Publications (47)
Kickstarting Reionization with the First Black Holes: the effects of second-order perturbation theory in pre-reionization volumes
Kelly Holley-Bockelmann, John H. Wise, Manodeep Sinha
We explore structure formation in the dark ages () using two well-known methods for initializing cosmological -body simulations. Overall, both the Zel'dovich approxi…
The Secondary Spin Bias of Dark Matter Haloes
James W. Johnson, Ariyeh H. Maller, Andreas A. Berlind +2
We investigate the role of angular momentum in the clustering of dark matter haloes. We make use of data from two high-resolution N-body simulations spanning over four orders of ma…
Reversing Arrested Development: A New Method to Address Halo Assembly Bias
William Smith, Andreas Berlind, Manodeep Sinha
Halo assembly bias is a phenomenon whereby the clustering of dark matter halos is dependent on halo properties, such as age, at fixed mass. Understanding the origin of assembly bia…
The origin of dust in galaxies across cosmic time
Dian P. Triani, Manodeep Sinha, Darren J. Croton +2
We study the dust evolution in galaxies by implementing a detailed dust prescription in the SAGE semi-analytical model for galaxy formation. The new model, called Dusty SAGE, follo…
Method for Determining AGN Accretion Phase in Field Galaxies
Miroslav Micic, Nemanja Martinovic, Manodeep Sinha
Recent observations of AGN activity in massive galaxies (log Mstar / Msun > 10.4) show that: 1) at z < 1, AGN-hosting galaxies do not show enhanced merger signatures compared to no…
The Lives of High Redshift Mergers
Tom McCavana, Miroslav Micic, Geraint F. Lewis +4
We present a comparative study of recent works on merger-timescales with dynamical friction and find a strong contrast between idealized/isolated mergers (Boylan-Kolchin et al. 200…
Bar Formation from Galaxy Flybys
Meagan Lang, Kelly Holley-Bockelmann, Manodeep Sinha
Recently, both simulations and observations have revealed that flybys - fast, one-time interactions between two galaxy halos - are surprisingly common, nearing/comparable to galaxy…
Corrfunc --- A Suite of Blazing Fast Correlation Functions on the CPU
Manodeep Sinha, Lehman H. Garrison
The two-point correlation function (2PCF) is the most widely used tool for quantifying the spatial distribution of galaxies. Since the distribution of galaxies is determined by gal…
A First Look at Galaxy Flyby Interactions: I. Characterizing the Frequency of Flybys in a Cosmological Context
Manodeep Sinha, Kelly Holley-Bockelmann
Hierarchical structure formation theory is based on the notion that mergers drive galaxy evolution, so a considerable framework of semi-analytic models and N-body simulations has b…
Dust contribution to the panchromatic galaxy emission
Dian P. Triani, Darren J. Croton, Manodeep Sinha +3
We have developed a pipeline called \mentari to generate the far-ultraviolet to far-infrared spectral energy distribution (SED) of galaxies from the \dustysage semi-analytic galaxy…
A First Look at Galaxy Flyby Interactions: Characterizing the Frequency of Flybys in a Cosmological Context
Manodeep Sinha, Kelly Holley-Bockelmann
Hierarchical structure formation theory is based on the notion that mergers drive galaxy evolution, so a considerable framework of semi-analytic models and N-body simulations has b…
The Growing Importance of a Tech Savvy Astronomy and Astrophysics Workforce
Dara Norman, Kelle Cruz, Vandana Desai +26
Fundamental coding and software development skills are increasingly necessary for success in nearly every aspect of astronomical and astrophysical research as large surveys and hig…
The Uchuu Simulations: Data Release 1 and Dark Matter Halo Concentrations
Tomoaki Ishiyama, Francisco Prada, Anatoly A. Klypin +11
We introduce the Uchuu suite of large high-resolution cosmological -body simulations. The largest simulation, named Uchuu, consists of 2.1 trillion () dark matter parti…
Numerical Simulations of Hot Halo Gas in Galaxy Mergers
Manodeep Sinha, Kelly Holley-Bockelmann
Galaxy merger simulations have explored the behaviour of gas within the galactic disk, yet the dynamics of hot gas within the galaxy halo has been neglected. We report on the resul…
Machine Learning the Fates of Dark Matter Subhalos: A Fuzzy Crystal Ball
Abigail Petulante, Andreas A. Berlind, J. Kelly Holley-Bockelmann +1
The evolution of a dark matter halo in a dark matter only simulation is governed purely byNewtonian gravity, making a clean testbed to determine what halo properties drive its fate…
emcee v3: A Python ensemble sampling toolkit for affine-invariant MCMC
Daniel Foreman-Mackey, Will M. Farr, Manodeep Sinha +10
emcee is a Python library implementing a class of affine-invariant ensemble samplers for Markov chain Monte Carlo (MCMC). This package has been widely applied to probabilistic mode…
Toward Accurate Modeling of Galaxy Clustering on Small Scales: Constraining the Galaxy-Halo Connection with Optimal Statistics
Adam O. Szewciw, Gillian D. Beltz-Mohrmann, Andreas A. Berlind +1
Applying halo models to analyze the small-scale clustering of galaxies is a proven method for characterizing the connection between galaxies and their host halos. Such works are of…
The Astropy Problem
Demitri Muna, Michael Alexander, Alice Allen +151
The Astropy Project (http://astropy.org) is, in its own words, "a community effort to develop a single core package for Astronomy in Python and foster interoperability between Pyth…
Toward Accurate Modeling of Galaxy Clustering on Small Scales: Halo Model Extensions and Lingering Tension
Gillian D. Beltz-Mohrmann, Adam O. Szewciw, Andreas A. Berlind +1
This paper represents an effort to provide robust constraints on the galaxy-halo connection and simultaneously test the Planck LCDM cosmology using a fully numerical model of small…
The 21cm bispectrum during reionization: a tracer of the ionization topology
Anne Hutter, Catherine A. Watkinson, Jacob Seiler +3
We compute the bispectra of the 21cm signal during the Epoch of Reionization for three different reionization scenarios that are based on a dark matter N-body simulation combined w…
Can a Satellite Galaxy Merger Explain the Active Past of the Galactic Center?
Meagan Lang, Kelly Holley-Bockelmann, Tamara Bogdanovic +3
Observations of the Galactic Center (GC) have accumulated a multitude of "forensic" evidence indicating that several million years ago the center of the Milky Way galaxy was teamin…
Corrfunc: Blazing fast correlation functions with AVX512F SIMD Intrinsics
Manodeep Sinha, Lehman H. Garrison
Correlation functions are widely used in extra-galactic astrophysics to extract insights into how galaxies occupy dark matter halos and in cosmology to place stringent constraints…
Mentari: A pipeline to model the galaxy SED using semi analytic models
Dian Triani, Darren Croton, Manodeep Sinha
We build a theoretical picture of how the light from galaxies evolves across cosmic time. In particular, we predict the evolution of the galaxy spectral energy distribution (SED) b…
Towards Accurate Modelling of Galaxy Clustering on Small Scales: Testing the Standard + Halo Model
Manodeep Sinha, Andreas A. Berlind, Cameron K. McBride +3
Interpreting the small-scale clustering of galaxies with halo models can elucidate the connection between galaxies and dark matter halos. Unfortunately, the modelling is typically…
The Indirect Influence of Quasars on Reionization
Jacob Seiler, Anne Hutter, Manodeep Sinha +1
The exact role of quasars during the Epoch of Reionization remains uncertain. With consensus leaning towards quasars producing a negligible amount of ionizing photons, we pose an a…
Identification and Quenching of Nugget Galaxies in the RESOLVE Survey at z = 0
Derrick S. Carr, Sheila J. Kannappan, Mark A. Norris +7
We present a complete census of candidate nuggets, i.e., dense galaxies likely formed by compaction with intense gas influx, within the volume-limited REsolved Spectrosc…
Likelihood Non-Gaussianity in Large-Scale Structure Analyses
ChangHoon Hahn, Florian Beutler, Manodeep Sinha +3
Standard present day large-scale structure (LSS) analyses make a major assumption in their Bayesian parameter inference --- that the likelihood has a Gaussian form. For summary sta…
Connecting and dissecting galaxies' angular momenta and neutral gas in a hierarchical universe: cue DARK SAGE
Adam R. H. Stevens, Claudia del P. Lagos, Danail Obreschkow +1
We explore the connection between the atomic gas fraction, f_atm, and `global disc stability' parameter, q, of galaxies within a fully cosmological context by examining galaxies in…
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…
Uchuu-GC galaxies and AGN: Cosmic variance forecasts of high-redshift AGN for JWST, Euclid, and LSST
Taira Oogi, Tomoaki Ishiyama, Francisco Prada +10
Measurements of the luminosity function of active galactic nuclei (AGN) at high redshift () are expected to suffer from field-to-field variance, including cosmic and Po…
The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
The Astropy Collaboration, Adrian M. Price-Whelan, Pey Lian Lim +133
The Astropy Project supports and fosters the development of open-source and openly-developed Python packages that provide commonly needed functionality to the astronomical communit…
The Three Hundred project: a large catalogue of theoretically modelled galaxy clusters for cosmological and astrophysical applications
Weiguang Cui, Alexander Knebe, Gustavo Yepes +34
We introduce the THE THREE HUNDRED project, an endeavour to model 324 large galaxy clusters with full-physics hydrodynamical re-simulations. Here we present the data set and study…
Spatial Clustering of Dark Matter Halos: Secondary Bias, Neighbor Bias, and the Influence of Massive Neighbors on Halo Properties
Andrés N. Salcedo, Ariyeh H. Maller, Andreas A. Berlind +5
We explore the phenomenon commonly known as halo assembly bias, whereby dark matter halos of the same mass are found to be more or less clustered when a second halo property is con…
Void Galaxies Follow a Distinct Evolutionary Path in the Environmental COntext Catalog
Jonathan Florez, Andreas A. Berlind, Sheila J. Kannappan +6
We measure the environmental dependence, where environment is defined by the distance to the third nearest neighbor, of multiple galaxy properties inside the Environmental COntext…
Connecting massive galaxies to dark matter halos in BOSS - I. Is galaxy color a stochastic process in high-mass halos?
Shun Saito, Alexie Leauthaud, Andrew P. Hearin +9
We use subhalo abundance matching (SHAM) to model the stellar mass function (SMF) and clustering of the Baryon Oscillation Spectroscopic Survey (BOSS) "CMASS" sample at .…
Small- and Large-Scale Galactic Conformity in SDSS DR7
Victor F. Calderon, Andreas A. Berlind, Manodeep Sinha
Galactic conformity is the phenomenon whereby galaxy properties exhibit excess correlations across distance than that expected if these properties only depended on halo mass. We pe…
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…
Astro2020 APC White Paper: Elevating the Role of Software as a Product of the Research Enterprise
Arfon M. Smith, Dara Norman, Kelle Cruz +42
Software is a critical part of modern research, and yet there are insufficient mechanisms in the scholarly ecosystem to acknowledge, cite, and measure the impact of research softwa…
A First Look at Galaxy Flyby Interactions. II. Do Flybys matter?
Manodeep Sinha, Kelly Holley-Bockelmann
In the second paper of this series, we present results from cosmological simulations on the demographics of flyby interactions to gauge their potential impact on galaxy evolution.…
Using the Star Forming Main Sequence To Explore Quiescent Galaxies Across Cosmic Time
Tyler Houston, Darren J. Croton, Manodeep Sinha
In this letter, we explore the quiescent lives of central galaxies using the SAGE galaxy model and Uchuu dark matter simulation. We ask three questions: (1) How much of a galaxy's…
Balancing the Baryon Budget: The fraction of the IGM due to Galaxy Mergers
Manodeep Sinha, Kelly Holley-Bockelmann
Observations indicate that roughly 60% of the baryons may exist in a Warm-Hot Intergalactic Medium (WHIM) at low redshifts. Following up on previous results showing that gas is rel…
Dark Sage: Next-generation semi-analytic galaxy evolution with multidimensional structure and minimal free parameters
Adam R. H. Stevens, Manodeep Sinha, Alexander Rohl +4
After more than five years of development, we present a new version of Dark Sage, a semi-analytic model (SAM) of galaxy formation that breaks the mould for models of its kind. Incl…
Exploring the relation between dust mass and galaxy properties using Dusty SAGE
Dian P. Triani, Manodeep Sinha, Darren J. Croton +2
We explore the relation between dust and several fundamental properties of simulated galaxies using the Dusty SAGE semi-analytic model. In addition to tracing the standard galaxy p…
Model dispersion with PRISM; an alternative to MCMC for rapid analysis of models
Ellert van der Velden, Alan R. Duffy, Darren Croton +2
We have built PRISM, a "Probabilistic Regression Instrument for Simulating Models". PRISM uses the Bayes linear approach and history matching to construct an approximation ('emulat…
Early Growth in a Perturbed Universe: Exploring Dark Matter Halo Populations in 2LPT and ZA Simulations
Daniel J. Sissom, Kelly Holley-Bockelmann, Manodeep Sinha
We study the structure and evolution of dark matter halos from z = 300 to z = 6 for two cosmological N-body simulation initialization techniques. While the second order Lagrangian…
The Escape Fraction of Ionizing Photons During the Epoch of Reionization: observability with the Square Kilometre Array
Jacob Seiler, Anne Hutter, Manodeep Sinha +1
One of the most important parameters in characterizing the Epoch of Reionization, the escape fraction of ionizing photons, , remains unconstrained both observationa…
Voronoi Tessellation and Non-parametric Halo Concentration
Meagan Lang, Kelly Holley-Bockelmann, Manodeep Sinha
We present and test TesseRACt, a non-parametric technique for recovering the concentration of simulated dark matter halos using Voronoi tessellation. TesseRACt is tested on idealiz…