Publications (33)
The delay time distribution of Type-Ia supernovae in galaxy clusters: the impact of extended star-formation histories
Jonathan Freundlich, Dan Maoz
The delay time distribution (DTD) of Type-Ia supernovae (SNe Ia) is important for understanding chemical evolution, SN Ia progenitors, and SN Ia physics. Past estimates of the DTD…
Observations of Carbon Radio Recombination Lines with the NenuFAR telescope. I. Cassiopeia A and Cygnus A
Lucie Cros, Antoine Gusdorf, Philippe Salomé +26
Carbon Radio Recombination Lines (CRRLs) at decametre wavelengths trace the diffuse phase of the interstellar medium (ISM) of the Galaxy. Their observation allows to measure physic…
The Dekel-Zhao profile: A mass-dependent dark-matter density profile with flexible inner slope and analytic potential, velocity dispersion, and lensing properties
Jonathan Freundlich, Fangzhou Jiang, Avishai Dekel +6
We explore a function with two shape parameters for the dark-matter halo density profile subject to baryonic effects, which is a special case of the general Zhao family of models a…
SatGen: a semi-analytical satellite galaxy generator -- I. The model and its application to Local-Group satellite statistics
Fangzhou Jiang, Avishai Dekel, Jonathan Freundlich +5
We present a semi-analytic model of satellite galaxies, SatGen, which can generate large samples of satellite populations for a host halo of desired mass, redshift, and assembly hi…
Central star formation in double-peak gas rich radio galaxies
Daniel Maschmann, Anne-Laure Melchior, Francoise Combes +4
In a recent work, a large sample of double-peak (DP) emission line galaxies have been identified from the SDSS. While the two peaks could represent two kinematic components, they m…
Halo heating from fluctuating gas in a model dwarf
Mahmoud Hashim, Amr El-Zant, Jonathan Freundlich +2
The cold dark matter (CDM) structure formation scenario faces challenges on (sub)galactic scales, central among them being the `cusp-core' problem. A known remedy, driving CDM out…
The Response of Dark Matter Haloes to Gas Ejection: CuspCore II
Zhaozhou Li, Avishai Dekel, Nir Mandelker +2
We propose an analytic model, CuspCore II, for the response of dark matter (DM) haloes to central gas ejection, as a mechanism for generating DM-deficient cores in dwarfs and high-…
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…
A mass threshold for galactic gas discs by spin flips
Avishai Dekel, Omri Ginzburg, Fangzhou Jiang +4
We predict, analytically and by simulations, that gas discs tend to survive only in haloes above a threshold mass (stellar mass )…
Star formation across cosmic time
Jonathan Freundlich
The interstellar medium of galaxies is composed of multiple phases, including molecular, atomic, and ionized gas, as well as dust. Stars are formed within this medium from cold mol…
Emergence and cosmic evolution of the Kennicutt-Schmidt relation driven by interstellar turbulence
Katarina Kraljic, Florent Renaud, Yohan Dubois +12
The scaling relations between the gas content and star formation rate of galaxies provide useful insights into processes governing their formation and evolution. We investigate the…
Forming off-center massive black hole binaries in dwarf galaxies through Jacobi capture
Thibaut L. François, Christian M. Boily, Jonathan Freundlich +2
It is well established that black holes reside in the central regions of virtually all types of known galaxies. Recent observational and numerical studies however challenge this pi…
Measures of luminous and dark matter in galaxies across time
Jonathan Freundlich, Gauri Sharma, Sabine Thater +14
Dark matter is one of the pillars of the current standard model of structure formation: it is assumed to constitute most of the matter in the Universe. However, it can so far only…
Core Formation in High-z Massive Haloes: Heating by Post Compaction Satellites and Response to AGN Outflows
Avishai Dekel, Jonathan Freundlich, Fangzhou Jiang +6
Observed rotation curves in star-forming galaxies indicate a puzzling dearth of dark matter in extended flat cores within haloes of mass at . T…
A model for core formation in dark matter haloes and ultra diffuse galaxies by outflow episodes
Jonathan Freundlich, Avishai Dekel, Fangzhou Jiang +5
We present a simple model for the response of a dissipationless spherical system to an instantaneous mass change at its center, describing the formation of flat cores in dark matte…
Probing the molecular gas content of galaxies in an over-dense group at z~0.7: a test case for environmental quenching
Jonathan Freundlich, Benoît Epinat, Thierry Contini +14
To probe the impact of group environment on molecular gas reservoirs at intermediate redshift, we observed the CO(2-1) emission in the galaxy group COSMOS-Gr30 at with…
Evaluating Galaxy Dynamical Masses From Kinematics and Jeans Equilibrium in Simulations
Michael Kretschmer, Avishai Dekel, Jonathan Freundlich +3
We provide prescriptions to evaluate the dynamical mass () of galaxies from kinematic measurements of stars or gas using analytic considerations and the VELA suite of…
From cusps to cores: a stochastic model
Amr El-Zant, Jonathan Freundlich, Francoise Combes
The cold dark matter model of structure formation faces apparent problems on galactic scales. Several threads point to excessive halo concentration, including central densities tha…
Origin of Star-Forming Rings around Massive Centres in Massive Galaxies at
Avishai Dekel, Sharon Lapiner, Omri Ginzburg +9
Using analytic modeling and simulations, we address the origin of an abundance of star-forming, clumpy, extended gas rings about massive central bodies in massive galaxies at $z \!…
Local stability of a gravitating filament: a dispersion relation
Jonathan Freundlich, Chanda J. Jog, Françoise Combes
Filamentary structures are ubiquitous in astrophysics and are observed at various scales. On a cosmological scale, matter is usually distributed along filaments, and filaments are…
Starbursts hiding in the main sequence: a pathway toward quenching?
Florent Renaud, Katarina Kraljic, Jonathan Freundlich +10
Star-forming galaxies spend most of their lifetimes on the star-forming main sequence, which establishes a tight empirical and statistical relation between stellar mass and star-fo…
Matière noire et (ou) gravitation modifiée : une approche historique et épistémologique
Benoit Famaey, Jonathan Freundlich
The current standard model of cosmology assumes that the majority of matter in the Universe is made of dark matter, and that the latter is fundamentally different from ordinary mat…
The effect of fluctuating fuzzy axion haloes on stellar dynamics: a stochastic model
Amr El-Zant, Jonathan Freundlich, Francoise Combes +1
Fuzzy dark matter of ultra-light axions has gained attention, largely in light of the galactic scale problems associated with cold dark matter. But the large de Broglie wavelength,…
Simulations of cluster ultra-diffuse galaxies in MOND
Srikanth T. Nagesh, Jonathan Freundlich, Benoit Famaey +4
Ultra-diffuse galaxies (UDGs) in the Coma cluster have velocity dispersion profiles that are in full agreement with the predictions of Modified Newtonian Dynamics (MOND) in isolati…
Resolved molecular gas and star-formation in massive unquenched spirals : I. UGC 8179
Romane Cologni, Simon Flesch, Philippe Salomé +7
Recent studies have uncovered a rare population of super-massive (M* > 1e11 Msun) star-forming spiral galaxies, Super Spiral Galaxies (SSGs), whose existence challenges classical q…
Disk galaxies are self-similar: the universality of the HI-to-Halo mass ratio for isolated disks
Marie Korsaga, Benoit Famaey, Jonathan Freundlich +7
Observed scaling relations in galaxies between baryons and dark matter global properties are key to shed light on the process of galaxy formation and on the nature of dark matter.…
Wet Compaction to a Blue Nugget: a Critical Phase in Galaxy Evolution
Sharon Lapiner, Avishai Dekel, Jonathan Freundlich +6
We utilize high-resolution cosmological simulations to reveal that high-redshift galaxies tend to undergo a robust `wet compaction' event when near a `golden' stellar mass of $\sim…
Evolution of the Gas Mass Fraction of Progenitors to Today's Massive Galaxies: ALMA Observations in the CANDELS GOODS-S Field
Tommy Wiklind, Henry C. Ferguson, Yicheng Guo +12
We present an ALMA survey of dust continuum emission in a sample of 70 galaxies in the redshift range z=2-5 selected from the CANDELS GOODS-S field. Multi-Epoch Abundance Matching…
MUSE-DARK-II: 3D morpho-kinematic modelling of lensed galaxies. Tully-Fisher relation of star-forming galaxies
Alexandre Jeanneau, Johan Richard, Nicolas F. Bouché +5
In a series of papers on lensed kinematics, we seek to combine the sensitivity of 3D forward modelling to low signal-to-noise ratio outskirts with the enhanced spatial resolution o…
Formation of ultra-diffuse galaxies in the field and in galaxy groups
Fangzhou Jiang, Avishai Dekel, Jonathan Freundlich +4
We study ultra-diffuse galaxies (UDGs) in zoom in cosmological simulations, seeking the origin of UDGs in the field versus galaxy groups. We find that while field UDGs arise from d…
MusE GAs FLOw and Wind (MEGAFLOW) VII. A NOEMA pilot program to probe molecular gas in galaxies with measured circumgalactic gas flows
Jonathan Freundlich, Nicolas F. Bouché, Thierry Contini +5
We present a pilot program using IRAM's NOrthern Extended Millimeter Array (NOEMA) to probe the molecular gas reservoirs of six star-forming galaxies whose circumgalact…
PHIBSS: Exploring the Dependence of the CO-H Conversion Factor on Total Mass Surface Density at
Timothy Carleton, Michael C. Cooper, Alberto D. Bolatto +10
We present an analysis of the relationship between the CO-H conversion factor () and total mass surface density () in star-forming galaxies at $z <…
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-…