Publications (123)
Can intrinsic alignments of elongated low-mass galaxies be used to map the cosmic web at high redshift?
Viraj Pandya, Joel Primack, Peter Behroozi +13
Hubble Space Telescope observations show that low-mass () galaxies at high redshift () tend to be elongated (prolate) rather than disky (oblat…
Optical alignment of contamination-sensitive Far-Ultraviolet spectrographs for Aspera SmallSat mission
Aafaque R. Khan, Erika Hamden, Haeun Chung +48
Aspera is a NASA Astrophysics Pioneers SmallSat mission designed to study diffuse OVI emission from the warm-hot phase gas in the halos of nearby galaxies. Its payload consists of…
UniverseMachine: The Correlation between Galaxy Growth and Dark Matter Halo Assembly from z=0-10
Peter Behroozi, Risa Wechsler, Andrew Hearin +1
We present a method to flexibly and self-consistently determine individual galaxies' star formation rates (SFRs) from their host haloes' potential well depths, assembly histories,…
Emission Line Mapping of the Circumgalactic Medium of Nearby Galaxies
Dennis Zaritsky, Peter Behroozi, Molly S. Peeples +3
The circumgalactic medium (CGM), which harbors > 50% of all the baryons in a galaxy, is both the reservoir of gas for subsequent star formation and the depository of chemically pro…
Illuminating the dark universe with a very high density galaxy redshift survey over a wide area
Yun Wang, Rachel Bean, Peter Behroozi +27
The nature of dark energy remains a profound mystery 20 years after the discovery of cosmic acceleration. A very high number density galaxy redshift survey over a wide area (HD GRS…
Sussing Merger Trees: the influence of the halo finder
Santiago Avila, Alexander Knebe, Frazer R. Pearce +9
Merger tree codes are routinely used to follow the growth and merger of dark matter haloes in simulations of cosmic structure formation. Whereas in Srisawat et. al. we compared the…
A Model Connecting Galaxy Masses, Star Formation Rates, and Dust Temperatures Across Cosmic Time
Nia Imara, Abraham Loeb, Benjamin D. Johnson +2
We investigate the evolution of dust content in galaxies from redshifts z=0 to z=9.5. Using empirically motivated prescriptions, we model galactic-scale properties -- including hal…
Photometric Mass Estimation and the Stellar Mass-Halo Mass Relation for Low Mass Galaxies
Dennis Zaritsky, Peter Behroozi
We present a photometric halo mass estimation technique for local galaxies that enables us to establish the stellar mass-halo mass (SMHM) relation down to stellar masses of 10…
Semi-analytic forecasts for Roman -- the beginning of a new era of deep-wide galaxy surveys
L. Y. Aaron Yung, Rachel S. Somerville, Steven L. Finkelstein +11
The Nancy Grace Roman Space Telescope, NASA's next flagship observatory, will redefine deep-field galaxy survey with a field of view two orders of magnitude larger than Hubble and…
Observing Galaxy Evolution in the Context of Large-Scale Structure
Mark Dickinson, Yun Wang, James Bartlett +26
Galaxies form and evolve in the context of their local and large-scale environments. Their baryonic content that we observe with imaging and spectroscopy is intimately connected to…
On The History and Future of Cosmic Planet Formation
Peter Behroozi, Molly Peeples
We combine constraints on galaxy formation histories with planet formation models, yielding the Earth-like and giant planet formation histories of the Milky Way and the Universe as…
ChemicalUniverseMachine I: Uncovering the Cosmic Evolution of Metals in the Galaxy-ISM-CGM Ecosystem
Moka Nishigaki, Peter Behroozi, Masami Ouchi +5
We present an empirical chemical evolution model that explains the distribution of metals in the interstellar medium (ISM) and the circumgalactic medium (CGM) of galaxies based on…
Structure Finding in Cosmological Simulations: The State of Affairs
Alexander Knebe, Frazer R. Pearce, Hanni Lux +32
The ever increasing size and complexity of data coming from simulations of cosmic structure formation demands equally sophisticated tools for their analysis. During the past decade…
An Empirical Determination of the Dependence of the Circumgalactic Mass Cooling Rate and Feedback Mass Loading Factor on Galactic Stellar Mass
Huanian Zhang, Dennis Zaritsky, Karen Pardos Olsen +9
Using our measurements of the H emission line flux originating in the cool (T K) gas that populates the halos of galaxies, we build a joint model to describe mass of…
The Ray Tracing Sampler: Bayesian Sampling of Neural Networks for Everyone
Peter Behroozi
We derive a family of Markov Chain Monte Carlo (MCMC) sampling methods based on following ray paths in a medium where the refractive index is a function of the desired likel…
TRINITY VI: Connection between Galaxy Star Formation Rates and Supermassive Black Hole Accretion Rates from z=0-10
Haowen Zhang, Peter Behroozi, Marta Volonteri +6
We infer supermassive black hole (SMBH) accretion rates and Eddington ratios as a function of SMBH/host galaxy mass and redshift with the empirical TRINITY model of dark matter hal…
Mock Lightcones and Theory Friendly Catalogs for the CANDELS Survey
Rachel S. Somerville, Charlotte Olsen, L. Y. Aaron Yung +9
We present mock catalogs created to support the interpretation of the CANDELS survey. We extract halos along past lightcones from the Bolshoi Planck dissipationless N-body simulati…
Measuring the conditional luminosity and stellar mass functions of galaxies by combining the DESI LS DR9, SV3 and Y1 data
Yirong Wang, Xiaohu Yang, Yizhou Gu +42
In this investigation, we leverage the combination of Dark Energy Spectroscopic Instrument Legacy imaging Surveys Data Release 9 (DESI LS DR9), Survey Validation 3 (SV3), and Year…
TRINITY IV: Predictions for Supermassive Black Holes at
Haowen Zhang, Peter Behroozi, Marta Volonteri +6
We present predictions for the high-redshift halo-galaxy-supermassive black hole (SMBH) connection from the TRINITY model. Constrained by a comprehensive compilation of galaxy ($0\…
The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Modeling the clustering and halo occupation distribution of BOSS-CMASS galaxies in the Final Data Release
Sergio A. RodrÃguez-Torres, Chia-Hsun Chuang, Francisco Prada +21
We present a study of the clustering and halo occupation distribution of BOSS CMASS galaxies in the redshift range 0.43 < z < 0.7 drawn from the Final SDSS-III Data Release. We com…
The stellar-to-halo mass relation of central galaxies across three orders of halo mass
Victoria Toptun, Paola Popesso, Ilaria Marini +9
The stellar content of galaxies is tightly connected to the mass and growth of their host dark matter halos. Observational constraints on this relation remain limited, particularly…
Halo Properties from Observable Measures of Environment: II. Central versus Satellite Classification
Haley Bowden, Peter Behroozi
A physical understanding of galaxy formation and evolution benefits from an understanding of the connections between galaxies, their host dark matter halos, and their environments.…
An Increasing Stellar Baryon Fraction in Bright Galaxies at High Redshift
Steven L. Finkelstein, Mimi Song, Peter Behroozi +12
Recent observations have shown that the characteristic luminosity of the rest-frame ultraviolet (UV) luminosity function does not significantly evolve at 4 < z < 7 and is approxima…
A z=1.85 galaxy group in CEERS: evolved, dustless, massive intra-halo light and a brightest group galaxy in the making
Rosemary T. Coogan, Emanuele Daddi, Aurélien Le Bail +25
We present CEERS JWST/NIRCam imaging of a massive galaxy group at z=1.85, to explore the early JWST view on massive group formation in the distant Universe. The group contains >16…
Using Cumulative Number Densities to Compare Galaxies across Cosmic Time
Peter Behroozi, Danilo Marchesini, Risa Wechsler +3
Comparing galaxies across redshifts at fixed cumulative number density is a popular way to estimate the evolution of specific galaxy populations. This method ignores scatter in mas…
Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations
Jorge A. Zavala, Veronique Buat, Caitlin M. Casey +121
Lyman Break Galaxy (LBG) candidates at z>10 are rapidly being identified in JWST/NIRCam observations. Due to the (redshifted) break produced by neutral hydrogen absorption of rest-…
SAPPHIRES: A Galaxy Over-Density in the Heart of Cosmic Reionization at
Yoshinobu Fudamoto, Jakob M. Helton, Xiaojing Lin +17
We report the discovery of a galaxy proto-cluster candidate (dubbed MACS0416-OD-z8p5) at a spectroscopic redshift of , dating back to Myr after the Big Bang. Th…
The evolution of star formation histories of quiescent galaxies
Camilla Pacifici, Susan A. Kassin, Benjamin J. Weiner +22
Although there has been much progress in understanding how galaxies evolve, we still do not understand how and when they stop forming stars and become quiescent. We address this by…
Lonely Little Red Dots: Challenges to the AGN-nature of little red dots through their clustering and spectral energy distributions
MarÃa Carranza-Escudero, Christopher J. Conselice, Nathan Adams +31
Observations with the James Webb Space Telescope (JWST) reveal a previously unseen population of compact red objects, known as ``little red dots`` (LRDs). We study a new photometri…
Star-forming and Quiescent Central Galaxies Cluster Similarly: Implications for the Galaxy-Halo Connection
James Kakos, Aldo Rodriguez-Puebla, Joel R. Primack +4
We measure the clustering of low-redshift SDSS galaxies as a function of stellar mass () and specific star formation rate (sSFR) and compare the result…
The Complete CEERS Early Universe Galaxy Sample: A Surprisingly Slow Evolution of the Space Density of Bright Galaxies at z ~ 8.5-14.5
Steven L. Finkelstein, Gene C. K. Leung, Micaela B. Bagley +52
We present a sample of 88 candidate z~8.5-14.5 galaxies selected from the completed NIRCam imaging from the Cosmic Evolution Early Release Science (CEERS) survey. These data cover…
Emission line ratios for the Circumgalactic Medium and the "Bimodal" Nature of Galaxies
Huanian Zhang, Dennis Zaritsky, Jessica Werk +1
We find significantly different diagnostic emission line ratios for the circumgalactic gas associated with galaxies of stellar masses above and below M using SD…
ATLAS Probe: Breakthrough Science of Galaxy Evolution, Cosmology, Milky Way, and the Solar System
Yun Wang, Massimo Robberto, Mark Dickinson +37
ATLAS (Astrophysics Telescope for Large Area Spectroscopy) Probe is a concept for a NASA probe-class space mission. It is the follow-up space mission to WFIRST, boosting its scient…
Sussing Merger Trees: Stability and Convergence
Yang Wang, Frazer R. Pearce, Alexander Knebe +15
Merger trees are routinely used to follow the growth and merging history of dark matter haloes and subhaloes in simulations of cosmic structure formation. Srisawat et al. (2013) co…
A Long Time Ago in a Galaxy Far, Far Away: A Candidate z ~ 12 Galaxy in Early JWST CEERS Imaging
Steven L. Finkelstein, Micaela B. Bagley, Pablo Arrabal Haro +117
We report the discovery of a candidate galaxy with a photo-z of z~12 in the first epoch of the JWST Cosmic Evolution Early Release Science (CEERS) Survey. Following conservative se…
On the intermediate-redshift central stellar mass-halo mass relation, and implications for the evolution of the most massive galaxies since z~1
Francesco Shankar, Hong Guo, Vincent Bouillot +20
The stellar mass-halo mass relation is a key constraint in all semi-analytic, numerical, and semi-empirical models of galaxy formation and evolution. However, its exact shape and r…
Dark Matter Halo Properties vs. Local Density and Cosmic Web Location
Tze Goh, Joel Primack, Christoph T. Lee +6
We study the effects of the local environmental density and the cosmic web environment (filaments, walls, and voids) on key properties of dark matter halos using the Bolshoi-Planck…
Confirmation of the standard cosmological model from red massive galaxies Myr after the Big Bang
Francisco Prada, Peter Behroozi, Tomoaki Ishiyama +2
In their recent study, Labbé et al. used multi-band infrared images captured by the James Webb Space Telescope (JWST) to discover a population of red massive galaxies that formed…
The Universe at z>10: Predictions for JWST from the UniverseMachine DR1
Peter Behroozi, Charlie Conroy, Risa H. Wechsler +8
The James Webb Space Telescope (JWST) is expected to observe galaxies at that are presently inaccessible. Here, we use a self-consistent empirical model, the UniverseMachine…
Characterising ultra-high-redshift dark matter halo demographics and assembly histories with the GUREFT simulations
L. Y. Aaron Yung, Rachel S. Somerville, Tri Nguyen +3
Dark matter halo demographics and assembly histories are a manifestation of cosmological structure formation and have profound implications for the formation and evolution of galax…
The Nature of Massive Transition Galaxies in CANDELS, GAMA, and Cosmological Simulations
Viraj Pandya, Ryan Brennan, Rachel S. Somerville +25
We explore observational and theoretical constraints on how galaxies might transition between the "star-forming main sequence" (SFMS) and varying "degrees of quiescence" out to $z=…
TRINITY III: Quasar Luminosity Functions Decomposed by Halo, Galaxy, and Black Hole Masses and Eddington Ratios from z=0-10
Haowen Zhang, Peter Behroozi, Marta Volonteri +5
We present the redshift evolution of quasar luminosity functions decomposed by halo mass, galaxy mass, supermassive black hole (SMBH) mass, and Eddington ratio, as well as SMBH kin…
Forward Modeling of Large-Scale Structure: An open-source approach with Halotools
Andrew Hearin, Duncan Campbell, Erik Tollerud +11
We present the first stable release of Halotools (v0.2), a community-driven Python package designed to build and test models of the galaxy-halo connection. Halotools provides a mod…
Astro2020: Empirically Constraining Galaxy Evolution
Peter Behroozi, Matthew R. Becker, Frank C. van den Bosch +22
Over the past decade, empirical constraints on the galaxy-dark matter halo connection have significantly advanced our understanding of galaxy evolution. Past techniques have focuse…
Reliable Determination of Contact Angle from the Height and Volume of Sessile Drops
Feredoon Behroozi, Peter Behroozi
Contact angle is an important parameter in characterizing the wetting properties of fluids. The most common methods for measuring the contact angle is to measure it directly from t…
Tidal Stripping and Post-Merger Relaxation of Dark Matter Halos: Causes and Consequences of Mass Loss
Christoph T. Lee, Joel R. Primack, Peter Behroozi +3
We study the properties of distinct dark matter halos (i.e., those that are not subhalos) that have a final virial mass at less than their peak mass ($M_…
Major Mergers Going Notts: Challenges for Modern Halo Finders
Peter Behroozi, Alexander Knebe, Frazer R. Pearce +7
Merging haloes with similar masses (i.e., major mergers) pose significant challenges for halo finders. We compare five halo finding algorithms' (AHF, HBT, Rockstar, SubFind, and VE…
A Promise for the JWST era: Massive black holes directly collapsed from wave dark matter haloes, and Star formation in and around their accretion flows
Xiaobo Dong, Yongda Zhu, Marcia Rieke +7
There are several puzzling phenomena from recent JWST observations, which seem to push the standard ÎCDM cosmology over the edge. All those puzzles can be understood in a coherent…
Evolution of the Stellar-to-Dark Matter Relation: Separating Star-Forming and Passive Galaxies from z=1 to 0
Jeremy L. Tinker, Alexie Leauthaud, Kevin Bundy +5
We use measurements of the stellar mass function, galaxy clustering, and galaxy-galaxy lensing within the COSMOS survey to constrain the stellar-to-halo mass relation (SHMR) of sta…
Galaxies at z > 10: ÎCDM predicts increased Star Formation Efficiency
Francisco Prada, Peter Behroozi, Tomoaki Ishiyama +4
We show that the rest-frame UV statistics and global properties of galaxies at 7 <= z <= 14 are naturally reproduced within the standard ÎCDM framework when galaxy formation is mo…
Weak Lensing Reveals a Tight Connection Between Dark Matter Halo Mass and the Distribution of Stellar Mass in Massive Galaxies
Song Huang, Alexie Leauthaud, Andrew Hearin +9
Using deep images from the Hyper Suprime-Cam (HSC) survey and taking advantage of its unprecedented weak lensing capabilities, we reveal a remarkably tight connection between the s…
ATLAS Probe: Breakthrough Science of Galaxy Evolution, Cosmology, Milky Way, and the Solar System
Yun Wang, Mark Dickinson, Lynne Hillenbrand +45
ATLAS (Astrophysics Telescope for Large Area Spectroscopy) is a concept for a NASA probe-class space mission. It is the spectroscopic follow-up mission to WFIRST, boosting its scie…
H Emission and the Dependence of the Circumgalactic Cool Gas Fraction on Halo Mass
Huanian Zhang, Xiaohu Yang, Dennis Zaritsky +2
We continue our empirical study of the emission line flux originating in the cool ( K) gas that populates the halos of galaxies and their environments. Specifically, we…
Observing the Effects of Galaxy Interactions on the Circumgalactic Medium
Huanian Zhang, Taotao Fang, Dennis Zaritsky +3
We continue our empirical study of the emission line flux originating in the cool ( K) gas that populates the halos of galaxies and their environments. Specifically, we…
TRINITY II: The Luminosity-dependent Bias of the Supermassive Black Hole Mass--Galaxy Mass Relation for Bright Quasars at
Haowen Zhang, Peter Behroozi, Marta Volonteri +5
Using recent empirical constraints on the dark matter halo--galaxy--supermassive black hole (SMBH) connection from , we infer how undermassive, typical, and overmassive SMBH…
NeutralUniverseMachine: An Empirical Model for the Evolution of HI and H Gas in the Universe
Hong Guo, Jing Wang, Michael G. Jones +1
Accurately modeling the cold gas content in the universe is challenging for current theoretical models. We propose a new empirical model NeutralUniverseMachine for the evolution of…
Recoiling Supermassive Black Hole Escape Velocities from Dark Matter Halos
Nick Choksi, Peter Behroozi, Marta Volonteri +4
We simulate recoiling black hole trajectories from to in dark matter halos, quantifying how parameter choices affect escape velocities. These choices include the stren…
The ALMA Spectroscopic Survey in the HUDF: A model to explain observed 1.1 and 0.85 millimeter dust continuum number counts
Gergö Popping, Fabian Walter, Peter Behroozi +17
We present a new semi-empirical model for the dust continuum number counts of galaxies at 1.1 millimeter and 850 \micron. Our approach couples an observationally motivated model fo…
Where do High-Velocity Dark Matter Particles come from in the Milky Way?
Aidan DeBrae, Peter Behroozi, Nicolas Garavito-Camargo
High-velocity particles ( ) in the Milky Way are rare but nonetheless important to characterize due to their impact on dark matter (DM) direct detection experimen…
Sussing Merger Trees : The Impact of Halo Merger Trees on Galaxy Properties in a Semi-Analytic Model
Jaehyun Lee, Sukyoung K. Yi, Pascal J. Elahi +13
A halo merger tree forms the essential backbone of a semi-analytic model for galaxy formation and evolution. Recent studies have pointed out that extracting merger trees from numer…
Hierarchical Galaxy Growth and Scatter in the Stellar Mass - Halo Mass Relation
Meng Gu, Charlie Conroy, Peter Behroozi
The relation between galaxies and dark matter halos reflects the combined effects of many distinct physical processes. Observations indicate that the stellar mass-halo mass (…
MPI-Rockstar: a Hybrid MPI and OpenMP Parallel Implementation of the Rockstar Halo finder
Tomoyuki Tokuue, Tomoaki Ishiyama, Ken Osato +2
MPI-Rockstar is a massively parallel halo finder based on the Rockstar phase-space temporal halo finder code, which is one of the most extensively used halo finding codes. Compared…
Semi-analytic forecasts for JWST -- IV. Implications for cosmic reionization and LyC escape fraction
L. Y. Aaron Yung, Rachel S. Somerville, Steven L. Finkelstein +5
Galaxies forming in low-mass halos are thought to be primarily responsible for reionizing the Universe during the first billion years after the Big Bang. Yet, these halos are extre…
Demographics of Star-forming Galaxies since . I. The Diagram in CANDELS
Jerome J. Fang, S. M. Faber, David C. Koo +41
This is the first in a series of papers examining the demographics of star-forming galaxies at in CANDELS. We study 9,100 galaxies from GOODS-S and UDS having published…
Characterizing the host galaxies and delay times of Ca-rich gap transients vs 91bg-like SNe and normal Type Ia SNe
Peter Scherbak, Abigail Polin, Mansi Kasliwal +4
Calcium-rich gap transients are a faint, fast-evolving class of supernovae that show strong nebular Ca emission lines. Their progenitor systems are uncertain, but they are often as…
The SAGA Survey. V. Modeling Satellite Systems around Milky Way-mass Galaxies with Updated UniverseMachine
Yunchong Wang, Ethan O. Nadler, Yao-Yuan Mao +11
Environment plays a critical role in shaping the assembly of low-mass galaxies. Here, we use the UniverseMachine (UM) galaxy-halo connection framework and the Data Release 3 of the…
Subhaloes gone Notts: Subhaloes as tracers of the dark matter halo shape
Kai Hoffmann, Susana Planelles, Enrique Gaztanaga +14
We study the shapes of subhalo distributions from four dark-matter-only simulations of Milky Way type haloes. Comparing the shapes derived from the subhalo distributions at high re…
CEERS Key Paper III: The Diversity of Galaxy Structure and Morphology at z=3-9 with JWST
Jeyhan S. Kartaltepe, Caitlin Rose, Brittany N. Vanderhoof +58
We present a comprehensive analysis of the evolution of the morphological and structural properties of a large sample of galaxies at z=3-9 using early JWST CEERS NIRCam observation…
The Uchuu-UniverseMachine dataset: Galaxies in and around Clusters
Han Aung, Daisuke Nagai, Anatoly Klypin +7
We present the public data release of the Uchuu-UM galaxy catalogues by applying the UniverseMachine algorithm to assign galaxies to the dark matter halos in the Uchuu -body cos…
Is Main Sequence Galaxy Star Formation Controlled by Halo Mass Accretion?
Aldo Rodriguez-Puebla, Joel R. Primack, Peter Behroozi +1
The galaxy stellar-to-halo mass relation (SHMR) is nearly time-independent for . We therefore construct a time-independent SHMR model for central galaxies, wherein the in-si…
On The Effect of Environment on Line Emission from the Circumgalactic Medium
Huanian Zhang, Dennis Zaritsky, Peter Behroozi +1
We measure differences in the emission line flux from the circumgalactic medium, CGM, of galaxies in different environments. Such differences could be a critical clue in explaining…
One Galaxy Sample to Rule Them All: Halo Occupation Distribution Modeling of DES Year 3 Source Galaxies
Andrés N. Salcedo, Tim Eifler, Peter Behroozi
For the joint analysis of second-order weak lensing and galaxy clustering statistics, so-called analyses, the selection and characterization of optimal galaxy samples…
Machine Learning the Dark Matter Halo Mass of Milky Way-Like Systems
Elaheh Hayati, Peter Behroozi, Ekta Patel
Despite the Milky Way's proximity to us, our knowledge of its dark matter halo is fairly limited, and there is still considerable uncertainty in its halo mass. Many past techniques…
Lensing is Low: Cosmology, Galaxy Formation, or New Physics?
Alexie Leauthaud, Shun Saito, Stefan Hilbert +19
We present high signal-to-noise galaxy-galaxy lensing measurements of the BOSS CMASS sample using 250 square degrees of weak lensing data from CFHTLenS and CS82. We compare this si…
Trinity VII. Predictions for the Observable Correlation Functions of Accreting Black Holes
Oddisey Knox, Haowen Zhang, Peter Behroozi
The quasar correlation function assesses the occurrence of quasar pairs as a function of separation, which is strongly influenced by quasar host halo masses. The empirical Trinity…
Physical Correlations of the Scatter between Galaxy Mass, Stellar Content, and Halo Mass
Christopher Bradshaw, Alexie Leauthaud, Andrew Hearin +2
We use the UniverseMachine to analyze the source of scatter between the central galaxy mass, the total stellar mass in the halo, and the dark matter halo mass. We also propose a ne…
Galaxies going MAD: The Galaxy-Finder Comparison Project
Alexander Knebe, Noam I. Libeskind, Frazer Pearce +8
With the ever increasing size and complexity of fully self-consistent simulations of galaxy formation within the framework of the cosmic web, the demands upon object finders for th…
Halo and Subhalo Demographics with Planck Cosmological Parameters: Bolshoi-Planck and MultiDark-Planck Simulations
Aldo Rodriguez-Puebla, Peter Behroozi, Joel Primack +3
We report and provide fitting functions for the abundance of dark matter halos and subhalos as a function of mass, circular velocity, and redshift from the new Bolshoi-Planck and M…
Machine Learning the Dark Matter Halo Mass of the Milky Way
Elaheh Hayati, Peter Behroozi, Ekta Patel +3
Although numerous dynamical techniques have been developed to estimate the total dark matter halo mass of the Milky Way, it remains poorly constrained, with typical systematic unce…
CEERS Key Paper I: An Early Look into the First 500 Myr of Galaxy Formation with JWST
Steven L. Finkelstein, Micaela B. Bagley, Henry C. Ferguson +64
We present an investigation into the first 500 Myr of galaxy evolution from the Cosmic Evolution Early Release Science (CEERS) survey. CEERS, one of 13 JWST ERS programs, targets g…
Halo Properties from Observable Measures of Environment: I. Halo and Subhalo Masses
Haley Bowden, Peter Behroozi, Andrew Hearin
The stellar mass - halo mass relation provides a strong basis for connecting galaxies to their host dark matter halos in both simulations and observations. Other observable informa…
Clustering Constraints on the Relative Sizes of Central and Satellite Galaxies
Andrew Hearin, Peter Behroozi, Andrey Kravtsov +1
We empirically constrain how galaxy size relates to halo virial radius using new measurements of the size- and stellar mass-dependent clustering of galaxies in the Sloan Digital Sk…
A CEERS Discovery of an Accreting Supermassive Black Hole 570 Myr after the Big Bang: Identifying a Progenitor of Massive z > 6 Quasars
Rebecca L. Larson, Steven L. Finkelstein, Dale D. Kocevski +49
We report the discovery of an accreting supermassive black hole at z=8.679, in CEERS_1019, a galaxy previously discovered via a Ly-break by Hubble and with a Ly redshift fr…
The Evolution of the Galaxy Rest-Frame Ultraviolet Luminosity Function Over the First Two Billion Years
Steven L. Finkelstein, Russell E. Ryan, Casey Papovich +26
We present a robust measurement and analysis of the rest-frame ultraviolet (UV) luminosity function at z=4-8. We use deep Hubble Space Telescope imaging over the CANDELS/GOODS fiel…
UniverseMachine: Predicting Galaxy Star Formation over Seven Decades of Halo Mass with Zoom-in Simulations
Yunchong Wang, Ethan O. Nadler, Yao-Yuan Mao +3
We apply the empirical galaxy--halo connection model UniverseMachine to dark matter-only zoom-in simulations of isolated Milky Way (MW)--mass halos along with their parent cosmolog…
MultiDark-Galaxies: data release and first results
Alexander Knebe, Doris Stoppacher, Francisco Prada +18
We present the public release of the MultiDark-Galaxies: three distinct galaxy catalogues derived from one of the Planck cosmology MultiDark simulations (i.e. MDPL2, with a volume…
Clustering of quasars in the First Year of the SDSS-IV eBOSS survey: Interpretation and halo occupation distribution
Sergio A. RodrÃguez-Torres, Johan Comparat, Francisco Prada +10
In current and future surveys, quasars play a key role. The new data will extend our knowledge of the Universe as it will be used to better constrain the cosmological model at reds…
Clustering and Halo Abundances in Early Dark Energy Cosmological Models
Anatoly Klypin, Vivian Poulin, Francisco Prada +7
LCDM cosmological models with Early Dark Energy (EDE) have been proposed to resolve tensions between the Hubble constant H0 = 100h km/s/Mpc measured locally, giving h ~ 0.73, and H…
Observing Correlations Between Dark Matter Accretion and Galaxy Growth: I. Recent Star Formation Activity in Isolated Milky Way-Mass Galaxies
Christine O'Donnell, Peter Behroozi, Surhud More
The correlation between fresh gas accretion onto haloes and galaxy star formation is critical to understanding galaxy formation. Different theoretical models have predicted differe…
A Census of the Bright z=8.5-11 Universe with the Hubble and Spitzer Space Telescopes in the CANDELS Fields
Steven L. Finkelstein, Micaela Bagley, Mimi Song +21
We present the results from a new search for candidate galaxies at z ~ 8.5-11 discovered over the 850 arcmin^2 area probed by the Cosmic Assembly Near-Infrared Deep Extragalactic L…
Sussing Merger Trees: The Merger Trees Comparison Project
Chaichalit Srisawat, Alexander Knebe, Frazer R. Pearce +15
Merger trees follow the growth and merger of dark-matter haloes over cosmic history. As well as giving important insights into the growth of cosmic structure in their own right, th…
Streams Going Notts: The tidal debris finder comparison project
Pascal J. Elahi, Jiaxin Han, Hanni Lux +6
While various codes exist to systematically and robustly find haloes and subhaloes in cosmological simulations (Knebe et al., 2011, Onions et al., 2012), this is the first work to…
Emission from the Ionized Gaseous Halos of Low Redshift Galaxies and Their Neighbors
Huanian Zhang, Dennis Zaritsky, Peter Behroozi
Using a sample of nearly half a million galaxies, intersected by over 8 million lines of sight from the Sloan Digital Sky Survey Data Release 12, we extend our previous study of th…
Subhaloes gone Notts: Spin across subhaloes and finders
Julian Onions, Yago Ascasibar, Peter Behroozi +15
We present a study of a comparison of spin distributions of subhaloes found associated with a host halo. The subhaloes are found within two cosmological simulation families of Milk…
Observing Correlations Between Dark Matter Accretion and Galaxy Growth: II. Testing the Impact of Galaxy Mass, Star Formation Indicator, and Neighbour Colours
Christine O'Donnell, Peter Behroozi, Surhud More
A crucial question in galaxy formation is what role new accretion has in star formation. Theoretical models have predicted a wide range of correlation strengths between halo accret…
Understanding the circumgalactic medium is critical for understanding galaxy evolution
Molly S. Peeples, Peter Behroozi, Rongmon Bordoloi +69
Galaxies evolve under the influence of gas flows between their interstellar medium and their surrounding gaseous halos known as the circumgalactic medium (CGM). The CGM is a major…
Clustering with JWST: Constraining Galaxy Host Halo Masses, Satellite Quenching Efficiencies, and Merger Rates at z=4-10
Ryan Endsley, Peter Behroozi, Daniel P. Stark +5
Galaxy clustering measurements can be used to constrain many aspects of galaxy evolution, including galaxy host halo masses, satellite quenching efficiencies, and merger rates. We…
The Most Massive Galaxies and Black Holes Allowed by CDM
Peter Behroozi, Joseph Silk
Given a galaxy's stellar mass, its host halo mass has a lower limit from the cosmic baryon fraction and known baryonic physics. At z>4, galaxy stellar mass functions place lower li…
CEERS Key Paper V: A triality on the nature of HST-dark galaxies
Pablo G. Pérez-González, Guillermo Barro, Marianna Annunziatella +52
The new capabilities that JWST offers in the near- and mid-infrared (IR) are used to investigate in unprecedented detail the nature of optical/near-IR faint, mid-IR bright sources,…
The Outer Stellar Mass of Massive Galaxies: A Simple Tracer of Halo Mass with Scatter Comparable to Richness and Reduced Projection Effects
Song Huang, Alexie Leauthaud, Christopher Bradshaw +7
Using the weak gravitational lensing data from the Hyper Suprime-Cam Subaru Strategic Program (HSC survey), we study the potential of different stellar mass estimates in tracing ha…