Publications (99)
CANDELS: Constraining the AGN-Merger Connection with Host Morphologies at z~2
Dale D. Kocevski, S. M. Faber, Mark Mozena +35
Using HST/WFC3 imaging taken as part of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS), we examine the role that major galaxy mergers play in triggeri…
The hidden side of cosmic star formation at z > 3: Bridging optically-dark and Lyman break galaxies with GOODS-ALMA
Mengyuan Xiao, David Elbaz, Carlos Gómez-Guijarro +37
Our current understanding of the cosmic star formation history at z>3 is primarily based on UV-selected galaxies (i.e., LBGs). Recent studies of H-dropouts have revealed that we ma…
Numerical simulations of galaxy evolution in cosmological context
Marie Martig, Frederic Bournaud, Romain Teyssier
Large volume cosmological simulations succeed in reproducing the large-scale structure of the Universe. However, they lack resolution and may not take into account all relevant phy…
Formation of Giant Clumps in High- Disc Galaxies by Compressive Turbulence
Nir Mandelker, Omry Ginzburg, Avishai Dekel +4
We address the formation of giant clumps in violently unstable gas-rich disc galaxies at cosmic noon. While these are commonly thought to originate from gravitational Toomre instab…
Hydrodynamics of high-redshift galaxy collisions: From gas-rich disks to dispersion-dominated mergers and compact spheroids
Frederic Bournaud, Damien Chapon, Romain Teyssier +7
Disk galaxies at high redshift (z~2) are characterized by high fractions of cold gas, strong turbulence, and giant star-forming clumps. Major mergers of disk galaxies at high redsh…
The thick disks of spiral galaxies as relics from gas-rich, turbulent, clumpy disks at high redshift
Frederic Bournaud, Bruce G. Elmegreen, Marie Martig
The formation of thick stellar disks in spiral galaxies is studied. Simulations of gas-rich young galaxies show formation of internal clumps by gravitational instabilities, clump c…
Unequal-mass galaxy merger remnants: spiral-like morphology but elliptical-like kinematics
Frederic Bournaud, Francoise Combes, Chanda J. Jog
It is generally believed that major galaxy mergers with mass ratios in the range 1:1-3:1 result in remnants that have properties similar to elliptical galaxies, and minor mergers b…
The Atlas3D project -- IV: the molecular gas content of early-type galaxies
Lisa M. Young, Martin Bureau, Timothy A. Davis +21
We have carried out a survey for 12CO J=1-0 and J=2-1 emission in the 260 early-type galaxies of the volume-limited Atlas3D sample, with the goal of connecting their star formation…
The Atlas3D project - V. The CO Tully-Fisher relation of early-type galaxies
Timothy A. Davis, Martin Bureau, Lisa M. Young +20
We demonstrate here using both single-dish and interferometric observations that CO molecules are an excellent kinematic tracer, even in high-mass galaxies, allowing us to investig…
Pearls on a string: Dark and bright galaxies on a strikingly straight and narrow filament
Maryam Arabsalmani, Sambit Roychowdhury, Benjamin Schneider +11
We identify a chain of galaxies along an almost straight line in the nearby Universe with a projected length of ~5 Mpc. The galaxies are distributed within projected distances of o…
Tidal debris from high-velocity collisions as fake dark galaxies: A numerical model of VirgoHI21
Pierre-Alain Duc, Frederic Bournaud
High speed collisions, although current in clusters of galaxies, have long been neglected, as they are believed to cause little damages to galaxies, except when they are repeated,…
Gemini GMOS and WHT SAURON integral-field spectrograph observations of the AGN driven outflow in NGC 1266
Timothy A. Davis, Davor Krajnovic, Richard M. McDermid +24
We use the SAURON and GMOS integral field spectrographs to observe the active galactic nucleus (AGN) powered outflow in NGC 1266. This unusual galaxy is relatively nearby (D=30 Mpc…
A Physical Approach to the Identification of High-z Mergers: Morphological Classification in the Stellar Mass Domain
Anna Cibinel, Emeric Le Floc'h, Valentin Perret +6
At z>1, the distinction between merging and 'normal' star-forming galaxies based on single band morphology is often hampered by the presence of large clumps which result in a distu…
The Atlas3D project - VII. A new look at the morphology of nearby galaxies: the kinematic morphology-density relation
Michele Cappellari, Eric Emsellem, Davor Krajnovic +20
We look at the morphology of fast and slow rotator early-type galaxies. Edge-on fast rotators are lenticular galaxies. They appear like spiral galaxies with the gas and dust remove…
Galaxy formation hydrodynamics: From cosmic flows to star-forming clouds
Frederic Bournaud
Major progress has been made over the last few years in understanding hydrodynamical processes on cosmological scales, in particular how galaxies get their baryons. There is increa…
Bulge growth through disk instabilities in high-redshift galaxies
Frederic Bournaud
The role of disk instabilities, such as bars and spiral arms, and the associated resonances, in growing bulges in the inner regions of disk galaxies have long been studied in the l…
The Global Star-Formation Law by Supernova Feedback
Avishai Dekel, Kartick C. Sarkar, Fangzhou Jiang +4
We address a simple model where the Kennicutt-Schmidt (KS) relation between the macroscopic densities of star-formation rate (SFR, ) and gas () in galactic discs e…
A Formation Scenario for the Disk of Satellites: Accretion of Satellites during Mergers
Rory Smith, Pierre-Alain Duc, Frederic Bournaud +1
The Disk of Satellites (DoS) observed in the Andromeda galaxy is a thin and extended group of satellites, nearly perpendicular to the disk plane, that share a common direction of r…
A systematic variation of the stellar initial mass function in early-type galaxies
Michele Cappellari, Richard M. McDermid, Katherine Alatalo +22
Much of our knowledge of galaxies comes from analysing the radiation emitted by their stars. It depends on the stellar initial mass function (IMF) describing the distribution of st…
Rotational Support of Giant Clumps in High-z Disc Galaxies
Daniel Ceverino, Avishai Dekel, Nir Mandelker +4
We address the internal support against total free-fall collapse of the giant clumps that form by violent gravitational instability in high-z disc galaxies. Guidance is provided by…
CANDELS Visual Classifications: Scheme, Data Release, and First Results
Jeyhan S. Kartaltepe, Mark Mozena, Dale Kocevski +49
We have undertaken an ambitious program to visually classify all galaxies in the five CANDELS fields down to H<24.5 involving the dedicated efforts of 65 individual classifiers. On…
Clump Survival and Migration in VDI Galaxies: an Analytic Model versus Simulations and Observations
Avishai Dekel, Nir Mandelker, Frederic Bournaud +3
We address the nature of the giant clumps in high-z galaxies that undergo Violent Disc Instability, attempting to distinguish between long-lived clumps that migrate inward and shor…
Starbursts in and out of the star-formation main sequence
David Elbaz, Roger Leiton, Neil Nagar +13
We use high-resolution continuum images obtained at 870microns with the Atacama Large Millimeter Array (ALMA) to probe the surface density of star-formation in z~2 galaxies and stu…
The driving mechanism of starbursts in galaxy mergers
Romain Teyssier, Damien Chapon, Frederic Bournaud
We present hydrodynamic simulations of a major merger of disk galaxies, and study the ISM dynamics and star formation properties. High spatial and mass resolutions of 12pc and 4x10…
A collisional origin for the Leo ring
Leo Michel-Dansac, Pierre-Alain Duc, Frederic Bournaud +6
Extended HI structures around galaxies are of prime importance to probe galaxy formation scenarios. The giant HI ring in the Leo group is one of the largest and most intriguing HI…
Massive star cluster formation and evolution in tidal dwarf galaxies
Jeremy Fensch, Pierre-Alain Duc, Mederic Boquien +8
The formation of globular clusters remains an open debate. Dwarf starburst galaxies are efficient at forming young massive clusters with similar masses as globular clusters and may…
Discovery of an AGN-Driven Molecular Outflow in the Local Early-Type Galaxy NGC 1266
Katherine Alatalo, Leo Blitz, Lisa M. Young +26
We report the discovery of a powerful molecular wind from the nucleus of the non-interacting nearby S0 field galaxy NGC 1266. The single-dish CO profile exhibits emission to +/- 40…
The long lives of giant clumps and the birth of outflows in gas-rich galaxies at high redshift
Frederic Bournaud, Valentin Perret, Florent Renaud +13
Star-forming disk galaxies at high redshift are often subject to violent disk instability, characterized by giant clumps whose fate is yet to be understood. The main question is wh…
The Atlas3D project - XII. Recovery of the mass-to-light ratio of simulated early-type barred galaxies with axisymmetric dynamical models
Pierre-Yves Lablanche, Michele Cappellari, Eric Emsellem +22
We investigate the accuracy in the recovery of the stellar dynamics of barred galaxies when using axisymmetric dynamical models. We do this by trying to recover the mass-to-light r…
High-redshift clumpy discs and bulges in cosmological simulations
Daniel Ceverino, Avishai Dekel, Frederic Bournaud
We analyze the first cosmological simulations that recover the fragmentation of high-redshift galactic discs driven by cold streams. The fragmentation is recovered owing to an AMR…
Bulge formation inside quiescent lopsided stellar disks: connecting accretion, star formation and morphological transformation in a z ~ 3 galaxy group
Boris S. Kalita, Emanuele Daddi, Frederic Bournaud +10
We present well-resolved near-IR and sub-mm analysis of the three highly star-forming massive () galaxies within the core of the RO-1001 galaxy group at $\…
Formation of late-type spiral galaxies: gas return from stellar populations regulates disk destruction and bulge growth
Marie Martig, Frederic Bournaud
Spiral galaxies have most of their stellar mass in a large rotating disk, and only a modest fraction in a central spheroidal bulge. This poses a major challenge for cosmological mo…
The Atlas3D Project - XXX. Star formation histories and stellar population scaling relations of early-type galaxies
Richard M. McDermid, Katherine Alatalo, Leo Blitz +20
We present the stellar population content of early-type galaxies from the Atlas3D survey. Using spectra integrated within apertures covering up to one effective radius, we apply tw…
Probing the star-formation modes in merging galaxies
Pierre-Alain Duc, Pierre-Emmanuel Belles, Elias Brinks +1
Merging systems at low redshift provide the unique opportunity to study the processes related to star formation in a variety of environments that presumably resemble those seen at…
Identifying old Tidal Dwarf Galaxies in Simulations and in the Nearby Universe
Pierre-Alain Duc, Frederic Bournaud, Frederic Masset
Most Tidal Dwarf Galaxies (TDGs) so-far discussed in the literature may be considered as young ones or even newborns, as they are still physically linked to their parent galaxies b…
Star formation and structure formation in galaxy collisions
Frederic Bournaud
A number of theoretical and simulation results on star and structure formation in galaxy interactions and mergers is reviewed, and recent hydrodynamic simulations are presented. Th…
Tidal Dwarf Galaxies as Laboratories of Star Formation and Cosmology
Pierre-Alain Duc, Frederic Bournaud, Mederic Boquien
Star formation may take place in a variety of locations in interacting systems: in the dense core of mergers, in the shock regions at the interface of the colliding galaxies and ev…
Molecular gas in Tidal Dwarf Galaxies: Exploring the conditions for star formation
Ute Lisenfeld, Frederic Bournaud, Elias Brinks +1
Tidal Dwarf Galaxies (TDGs), produced from material expelled in galactic interactions, are well--suited to test the laws of star formation (SF) due to their simple structure, high…
The Atlas3D project - XXIV. The intrinsic shape distribution of early-type galaxies
Anne-Marie Weijmans, P. T. de Zeeuw, Eric Emsellem +23
We use the Atlas3D sample to perform a study of the intrinsic shapes of early-type galaxies, taking advantage of the available combined photometric and kinematic data. Based on our…
Discovery of a giant HI tail in the galaxy group HCG 44
Paolo Serra, Baerbel Koribalski, Pierre-Alain Duc +25
We report the discovery of a giant HI tail in the intra-group medium of HCG 44 as part of the Atlas3D survey. The tail is ~300 kpc long in projection and contains ~5x10^8 M_sun of…
High star formation rates in turbulent atomic-dominated gas in the interacting galaxies IC 2163 and NGC 2207
Bruce G. Elmegreen, Michele Kaufman, Frederic Bournaud +4
CO observations of the interacting galaxies IC 2163 and NGC 2207 are combined with HI, Halpha and 24 microns to study the star formation rate (SFR) surface density as a function of…
The ATLAS3D Project - XXVIII. Dynamically-driven star formation suppression in early-type galaxies
Timothy A. Davis, Lisa M. Young, Alison F. Crocker +22
We present measurements of the star formation rate (SFR) in the early-type galaxies (ETGs) of the ATLAS3D sample, based on Wide-field Infrared Survey Explorer (WISE) 22um and Galax…
Starbursts with suppressed velocity dispersion revealed in a forming cluster at z=2.51
Mengyuan Xiao, Tao Wang, David Elbaz +19
One of the most prominent features of galaxy clusters is the presence of a dominant population of massive ellipticals in their cores. Stellar archaeology suggests that these gigant…
The Atlas3D project -- XIII. Mass and morphology of HI in early-type galaxies as a function of environment
Paolo Serra, Tom Oosterloo, Raffaella Morganti +23
We present the Atlas3D HI survey of 166 nearby early-type galaxies (ETGs) down to M(HI)~10^7 M_sun. We detect HI in ~40% of all ETGs outside the Virgo cluster and in ~10% of all ET…
A titanic interstellar medium ejection from a massive starburst galaxy at redshift 1.4
Annagrazia Puglisi, Emanuele Daddi, Marcella Brusa +12
Feedback-driven winds from star formation or active galactic nuclei might be a relevant channel for the abrupt quenching star formation in massive galaxies. However, both observati…
On the origin of compressive turbulence in protoclumps in high redshift disks
Omry Ginzburg, Avishai Dekel, Nir Mandelker +4
The giant, star forming clumps in gas-rich, high redshift disks are commonly assumed to form due to gravitational instabilities, in which protoclumps have a Toomre- parameter le…
The ATLAS3D project - II. Morphologies, kinemetric features and alignment between photometric and kinematic axes of early-type galaxies
Davor Krajnovic, Eric Emsellem, Michele Cappellari +20
[Abridged] We use the ATLAS3D sample of 260 early-type galaxies (ETGs) to study the apparent kinematic misalignment angle, Psi, defined as the angle between the photometric and kin…
Tidal Dwarf Galaxies and missing baryons
Frederic Bournaud
Tidal dwarf galaxies form during the interaction, collision or merger of massive spiral galaxies. They can resemble "normal" dwarf galaxies in terms of mass, size, and become dwarf…
An Observed Link between Active Galactic Nuclei and Violent Disk Instabilities in High-Redshift Galaxies
Frederic Bournaud, Stephanie Juneau, Emeric Le Floc'h +7
We provide evidence for a correlation between the presence of giant clumps and the occurrence of active galactic nuclei (AGN) in disk galaxies. Giant clumps of 10^8-9 Msun arise fr…
Polar ring galaxies: formation and properties
Frederic Bournaud, Francoise Combes
Formation scenarios for polar ring galaxies are studied through N-body simulatio ns that are compared with existing observations. It is shown that polar rings ar e likely to be for…
History and destiny of an emerging early-type galaxy: New IFU insights on the major-merger remnant NGC7252
John R. Weaver, Bernd Husemann, Harald Kuntschner +7
NGC7252, which is one of the nearest major-merger galaxy remnants, is an ideal laboratory to study the processes inherent to the transformation of disc galaxies to ellipticals as o…
Star formation in galaxy mergers: ISM turbulence, dense gas excess, and scaling relations for disks and starbusts
Frederic Bournaud, Leila C. Powell, Damien Chapon +1
Galaxy interactions and mergers play a significant, but still debated and poorly understood role in the star formation history of galaxies. Numerical and theoretical models cannot…
The Atlas3D project - XX. Mass-size and mass-sigma distributions of early-type galaxies: bulge fraction drives kinematics, mass-to-light ratio, molecular gas fraction and stellar initial mass function
Michele Cappellari, Richard M. McDermid, Katherine Alatalo +21
We study the (M,sigma) and (M,Re) projections of the thin Mass Plane (MP) (M,sigma,Re) which describes the distribution of the galaxy population. The distribution of galaxy propert…
Galactic star formation in parsec-scale resolution simulations
Leila C. Powell, Frederic Bournaud, Damien Chapon +3
The interstellar medium (ISM) in galaxies is multiphase and cloudy, with stars forming in the very dense, cold gas found in Giant Molecular Clouds (GMCs). Simulating the evolution…
Outflow from Outer-arm Starburst in a Grazing Collision between Galaxies
Michele Kaufman, Bruce G. Elmegreen, Morten Andersen +5
New ALMA CO, HCO+, and 100 GHz continuum observations and Gemini NIFS K-band spectra are combined with previous radio to X-ray data to study Feature i, a highly luminous starburst…
The Atlas-3D project - IX. The merger origin of a fast and a slow rotating Early-Type Galaxy revealed with deep optical imaging: first results
Pierre-Alain Duc, Jean-Charles Cuillandre, Paolo Serra +24
The mass assembly of galaxies leaves imprints in their outskirts, such as shells and tidal tails. The frequency and properties of such fine structures depend on the main acting mec…
ALMA CO Clouds and Young Star Complexes in the Interacting Galaxies IC 2163 and NGC 2207
Debra Meloy Elmegreen, Bruce G. Elmegreen, Michele Kaufman +5
ALMA observations of CO(1-0) emission in the interacting galaxies IC 2163 and NGC 2207 are used to determine the properties of molecular clouds and their association with star-form…
The Large Magellanic Cloud: A power spectral analysis of Spitzer images
Ivanio Puerari, David L. Block, Bruce G. Elmegreen +1
We present a power spectral analysis of Spitzer images of the Large Magellanic Cloud. The power spectra of the FIR emission show two different power laws. At larger scales (kpc) th…
Morphological quenching of star formation: making early-type galaxies red
Marie Martig, Frederic Bournaud, Romain Teyssier +1
We point out a natural mechanism for quenching of star formation in early-type galaxies. It automatically links the color of a galaxy with its morphology and does not require gas c…
The ATLAS3D Project -- XXIII. Angular momentum and nuclear surface brightness profiles
Davor Krajnovic, A. M. Karick, Roger L. Davies +22
[Abridged and Edited] We investigate nuclear light profiles in 135 ATLAS3D galaxies for which the Hubble Space Telescope (HST) imaging is available and compare them to the large sc…
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 <…
The Atlas3D project - XXVI. HI discs in real and simulated fast and slow rotators
Paolo Serra, Ludwig Oser, Davor Krajnovic +24
One quarter of all nearby early-type galaxies (ETGs) outside Virgo host a disc/ring of HI with size from a few to tens of kpc and mass up to ~1e+9 solar masses. Here we investigate…
The properties of the interstellar medium of galaxies across time as traced by the neutral atomic carbon [CI]
Francesco Valentino, Georgios E. Magdis, Emanuele Daddi +14
We report ALMA observations of the neutral atomic carbon transitions [CI] and multiple CO lines in a sample of main sequence galaxies at , including novel informat…
CO emission in distant galaxies on and above the main sequence
Francesco Valentino, Emanuele Daddi, Annagrazia Puglisi +17
We present the detection of multiple CO line transitions with ALMA in a few tens of infrared-selected galaxies on and above the main sequence at z=1.1-1.7. We reliably detected the…
Ocular Shock Front in the Colliding Galaxy IC 2163
Michele Kaufman, Bruce G. Elmegreen, Curtis Struck +5
ALMA observations in the CO 1 - 0 line of the interacting galaxies IC 2163 and NGC 2207 at 2" x 1.5" resolution reveal how the encounter drives gas to pile up in narrow, ~ 1 kpc wi…
The ATLAS3D Project - XXI. Correlations between gradients of local escape velocity and stellar populations in early-type galaxies
Nicholas Scott, Michele Cappellari, Roger L. Davies +22
We explore the connection between the local escape velocity, V_esc, and the stellar population properties in the ATLAS3D survey, a complete, volume-limited sample of nearby early-t…
A top-down scenario for the formation of massive Tidal Dwarf Galaxies
Pierre-Alain Duc, Frederic Bournaud, Frederic Masset
Among those objects formed out of collisional debris during galaxy mergers, the prominent gaseous accumulations observed near the tip of some long tidal tails are the most likely t…
Unstable disks at high redshift: Evidence for smooth accretion in galaxy formation
Frederic Bournaud, Bruce G. Elmegreen
Galaxies above redshift 1 can be very clumpy, with irregular morphologies dominated by star complexes as large as 2 kpc and as massive as a few 10^8 or 10^9 Mo. Their co-moving den…
GOODS-Herschel: Impact of Active Galactic Nuclei and Star Formation Activity on Infrared Spectral Energy Distributions at High Redshift
Allison Kirkpatrick, Alexandra Pope, David M. Alexander +25
We explore the effects of active galactic nuclei (AGN) and star formation activity on the infrared (0.3-1000 microns) spectral energy distributions of luminous infrared galaxies fr…
A diversity of progenitors and histories for isolated spiral galaxies
Marie Martig, Frederic Bournaud, Darren J. Croton +2
We analyze a suite of 33 cosmological simulations of the evolution of Milky Way-mass galaxies in low-density environments. Our sample spans a broad range of Hubble types at z=0, fr…
The impact of ISM turbulence, clustered star formation and feedback on galaxy mass assembly through cold flows and mergers
Leila C. Powell, Frederic Bournaud, Damien Chapon +3
Two of the dominant channels for galaxy mass assembly are cold flows (cold gas supplied via the filaments of the cosmic web) and mergers. How these processes combine in a cosmologi…
Multiple minor mergers: formation of elliptical galaxies and constraints for the growth of spiral disks
Frederic Bournaud, Chanda J. Jog, Francoise Combes
Multiple, sequential mergers are unavoidable in the hierarchical build-up picture of galaxies, in particular for the minor mergers that are frequent and highly likely to have occur…
Beyond the nuclear starburst? Clustered star formation in major mergers
Leila C. Powell, Frederic Bournaud, Damien Chapon +1
Recent simulation work has successfully captured the formation of the star clusters that have been observed in merging galaxies. These studies, however, tend to focus on studying e…
Black Hole growth and AGN obscuration by instability-driven inflows in high-redshift disk galaxies fed by cold streams
Frederic Bournaud, Avishai Dekel, Romain Teyssier +4
Disk galaxies at high redshift have been predicted to maintain high gas surface densities due to continuous feeding by intense cold streams leading to violent gravitational instabi…
Non-linear violent disc instability with high Toomre's Q in high-redshift clumpy disc galaxies
Shigeki Inoue, Avishai Dekel, Nir Mandelker +3
We utilize zoom-in cosmological simulations to study the nature of violent disc instability (VDI) in clumpy galaxies at high redshift, --. Our simulated galaxies are not in…
The Atlas3D project - XV. Benchmark for early-type galaxies scaling relations from 260 dynamical models: mass-to-light ratio, dark matter, Fundamental Plane and Mass Plane
Michele Cappellari, Nicholas Scott, Katherine Alatalo +21
We study the volume-limited and nearly mass selected (stellar mass M>6*10^9 Msun) Atlas3D sample of 260 early-type galaxies. We construct detailed axisymmetric dynamical models (JA…
The ATLAS3D project - XVII. Linking photometric and kinematic signatures of stellar discs in early-type galaxies
Davor Krajnovic, Katherine Alatalo, Leo Blitz +20
[Abridged] We analyse the morphological structures in galaxies of the ATLAS3D sample by fitting a single Sersic profile and decomposing all non-barred objects (180 of 260 objects)…
ISM properties in hydrodynamic galaxy simulations: Turbulence cascades, cloud formation, role of gravity and feedback
Frederic Bournaud, Bruce G. Elmegreen, Romain Teyssier +2
We study the properties of ISM substructure and turbulence in hydrodynamic (AMR) galaxy simulations with resolutions up to 0.8 pc and 5x10^3 Msun. We analyse the power spectrum of…
Tidal Debris posing as Dark Galaxies
Pierre-Alain Duc, Frederic Bournaud, Elias Brinks
Debris sent into the intergalactic medium during tidal collisions can tell us about several fundamental properties of galaxies, in particular their missing mass, both in the form o…
A deep search for molecular gas in two massive Lyman break galaxies at z=3 and 4: vanishing CO-emission due to low metallicity?
Qinghua Tan, Emanuele Daddi, Mark T. Sargent +14
We present deep IRAM Plateau de Bure Interferometer (PdBI) observations, searching for CO-emission toward two massive, non-lensed Lyman break galaxies (LBGs) at z=3.216 and 4.058.…
The Atlas3D project -- I. A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria
Michele Cappellari, Eric Emsellem, Davor Krajnovic +23
The Atlas3D project is a multi-wavelength survey combined with a theoretical modeling effort. The observations span from the radio to the millimeter and optical, and provide multi-…
Black hole growth and AGN feedback under clumpy accretion
Colin DeGraf, Avishai Dekel, Jared Gabor +1
High-resolution simulations of supermassive black holes in isolated galaxies have suggested the importance of short (~10 Myr) episodes of rapid accretion caused by interactions bet…
The Atlas3D project -- XXIX. The new look of early-type galaxies and surrounding fields disclosed by extremely deep optical images
Pierre-Alain Duc, Jean-Charles Cuillandre, Emin Karabal +24
Galactic archeology based on star counts is instrumental to reconstruct the past mass assembly of Local Group galaxies. The development of new observing techniques and data-reducti…
JWST/CEERS sheds light on dusty star-forming galaxies: forming bulges, lopsidedness and outside-in quenching at cosmic noon
Aurelien Le Bail, Emanuele Daddi, David Elbaz +26
We investigate the morphology and resolved physical properties of a sample of 22 IR-selected DSFG at cosmic noon using the JWST/NIRCam images obtained in the EGS field for the CEER…
The Atlas3D project - XIX. The hot-gas content of early-type galaxies: fast versus slow rotators
Marc Sarzi, Katherine Alatalo, Leo Blitz +20
For early-type galaxies, the ability to sustain a corona of hot, X-ray emitting gas could have played a key role in quenching their star-formation history. Yet, it is still unclear…
Gravitational torques in spiral galaxies: gas accretion as a driving mechanism of galactic evolution
David L. Block, Frederic Bournaud, Francoise Combes +2
The distribution of gravitational torques and bar strengths in the local Universe is derived from a detailed study of 163 galaxies observed in the near-infrared. The results are co…
Bulge Formation by the Coalescence of Giant Clumps in Primordial Disk Galaxies
Bruce G. Elmegreen, Frederic Bournaud, Debra Meloy Elmegreen
Gas-rich disks in the early universe are highly turbulent and have giant star-forming clumps. Models suggest the clumps form by gravitational instabilities, and if they resist disr…
The Atlas3D project -- XXXI. Nuclear radio emission in nearby early-type galaxies
Kristina Nyland, Lisa M. Young, Joan M. Wrobel +22
We present the results of a high-resolution, 5 GHz, Karl G. Jansky Very Large Array study of the nuclear radio emission in a representative subset of the Atlas3D survey of early-ty…
Triggering of merger-induced starbursts by the tidal field of galaxy groups and clusters
Marie Martig, Frederic Bournaud
Star formation in galaxies is for a part driven by galaxy mergers. At low redshift, star formation activity is low in high-density environments like groups and clusters, and the st…
Connection between dynamically derived IMF normalisation and stellar population parameters
Richard M. McDermid, Michele Cappellari, Katherine Alatalo +22
We report on empirical trends between the dynamically determined stellar initial mass function (IMF) and stellar population properties for a complete, volume-limited sample of 260…
The Atlas3D Project - VI. Simulations of binary galaxy mergers and the link with Fast Rotators, Slow Rotators, and Kinematically Distinct Cores
Maxime Bois, Eric Emsellem, Frederic Bournaud +21
We study the formation of early-type galaxies through mergers with a sample of 70 high-resolution (softening length < 60 pc and 12*10^6 particles) numerical simulations of binary m…
The role of turbulence in star formation laws and thresholds
Katarina Kraljic, Florent Renaud, Frederic Bournaud +4
The Schmidt-Kennicutt relation links the surface densities of gas to the star formation rate in galaxies. The physical origin of this relation, and in particular its break, i.e. th…
GOODS-Herschel and CANDELS: The Morphologies of Ultraluminous Infrared Galaxies at z~2
Jeyhan S. Kartaltepe, Mark Dickinson, David M. Alexander +40
Using deep 100-160 micron observations in GOODS-S from the GOODS-H survey, combined with HST/WFC3 NIR imaging from CANDELS, we present the first morphological analysis of a complet…
Sub-millimetre compactness as a critical dimension to understand the Main Sequence of star-forming galaxies
Annagrazia Puglisi, Emanuele Daddi, Francesco Valentino +11
We study the interstellar medium (ISM) properties as a function of the molecular gas size for 77 infrared-selected galaxies at . Molecular gas sizes are measured on ALM…
The ATLAS3D project - XXII. Low-efficiency star formation in early-type galaxies: hydrodynamic models and observations
Marie Martig, Alison F. Crocker, Frederic Bournaud +27
We study the global efficiency of star formation in high resolution hydrodynamical simulations of gas discs embedded in isolated early-type and spiral galaxies. Despite using a uni…
Nuclear Black Hole Formation in Clumpy Galaxies at High Redshift
Bruce G. Elmegreen, Frederic Bournaud, Debra Meloy Elmegreen
Massive stellar clumps in high redshift galaxies interact and migrate to the center to form a bulge and exponential disk in <1 Gyr. Here we consider the fate of intermediate mass b…
Star formation in galaxy interactions and mergers
Frederic Bournaud
This lecture reviews the fundamental physical processes involved in star formation in galaxy interactions and mergers. Interactions and mergers often drive intense starbursts, but…
A diversity of starburst-triggering mechanisms in interacting galaxies and their signatures in CO emission
Florent Renaud, Frederic Bournaud, Oscar Agertz +5
The physical origin of enhanced star formation activity in interacting galaxies remains an open question. Knowing whether starbursts are triggered by an increase of the quantity of…
The ATLAS3D Project-- VIII: Modelling the Formation and Evolution of Fast and Slow Rotator Early-Type Galaxies within CDM
Sadegh Khochfar, Eric Emsellem, Paolo Serra +22
We propose a simple model for the origin of fast and slow rotator early-type galaxies (ETG) within the hierarchical CDM scenario, that is based on the assumption that the mass…