957 citations · 14.3k across the 348 of their papers we have counts for
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Dynamical Influence of Bars on the Star Formation in Isolated Galaxies
S. Verley, F. Combes, L. Verdes-Montenegro +2
Star formation depends strongly on both the local environment of galaxies and the internal dynamics of the interstellar medium. To disentangle the two effects, we obtained, in the…
A multi-transition HCN and HCO+ study of 12 nearby active galaxies: AGN versus SB environments
M. Krips, R. Neri, S. Garcia-Burillo +4
Recent studies have indicated that the HCN-to-CO(J=1-0) and HCO+-to-HCN(J=1-0) ratios are significantly different between galaxies with AGN (active galactic nucleus) and SB (starbu…
The NUGA project: The Seyfert 2 galaxy NGC3147
V. Casasola, F. Combes, S. Garcia-Burillo +3
We present CO(1-0) and CO(2-1) maps of the Seyfert 2 galaxy NGC3147 of the NUclei of GAlaxies (NUGA) sample at 1.8'' x 1.6'' and 1.4'' x 1.2'' resolution respectively. Identifying…
Formation of cold filaments in cooling flow clusters
Y. Revaz, F. Combes, P. Salome
Emission-lines in the form of filamentary structures is common in bright clusters characterized by short cooling times. In the Perseus cluster, cold molecular gas, tightly linked t…
Old stellar counter-rotating components in elliptical-spiral mergers: exploring the GalMer database
P. Di Matteo, F. Combes, A. -L. Melchior +1
We investigate, by means of numerical simulations, the kinematics of elliptical-spiral merger remnants. Counterrotation can appear both in coplanar and in non-coplanar retrograde m…
CO investigation of z=0.4-1.5 galaxies
A. -L. Melchior, F. Combes
We report on the results of an IRAM-30m search for CO emission lines in three galaxies at intermediate redshifts. The idea was to investigate the molecular content of galaxies brig…
Velocity dispersion around ellipticals in MOND
O. Tiret, F. Combes, G. W. Angus +2
We investigate how different models that have been proposed for solving the dark matter problem can fit the velocity dispersion observed around elliptical galaxies, on either a sma…
Atomic Hydrogen Properties of AGN Host Galaxies: HI in 16 NUclei of GAlaxies (NUGA) Sources
S. Haan, E. Schinnerer, C. G. Mundell +2
We present a comprehensive spectroscopic imaging survey of the distribution and kinematics of atomic hydrogen (HI) in 16 nearby spiral galaxies hosting low luminosity AGN, observed…
Old stellar counter-rotating components in early-type galaxies from elliptical-spiral mergers
P. Di Matteo, F. Combes, A. -L. Melchior +1
We investigate, by means of numerical simulations, the possibility of forming counter-rotating old stellar components by major mergers between an elliptical and a spiral galaxy. We…
Disk Growth in Bulge-Dominated Galaxies: Molecular Gas and Morphological Evolution
Lisa Young, Martin Bureau, Alison Crocker +1
Substantial numbers of morphologically regular early-type (elliptical and lenticular) galaxies contain molecular gas, and the quantities of gas are probably sufficient to explain r…
Millimeter observations of HCM6A, a gravitationally lensed Lyman alpha emitting galaxy at z=6.56
Frédéric Boone, Daniel Schaerer, Roser Pello +2
The gravitationally lensed Lyman-alpha emitting galaxy, HCM6A, detected by Hu et al. (2002) at z=6.56 behind the Abell 370 cluster was observed with the MAMBO-2 array of bolometers…
The coupling of dynamics and molecular chemistry in galaxies
F. Combes
While the best tracer of the molecular component and its dynamics in galaxies is the CO molecule, which excitation is revealed by its isotopic and (2-1)/(1-0) ratios, the denser ga…
Bar formation and galaxy interactions in MOND
O. Tiret, F. Combes
The LCDM model is the most commonly admitted to describe our Universe. In spite of a great success with regard to the large scale structure formation, some problems are still unres…
Chemodynamical evolution of interacting galaxies: the GalMer view
P. Di Matteo, F. Combes, I. Chilingarian +2
We have undertaken a large set of simulations of galaxy interactions and mergers (GalMer Project) in order to study the physical processes related to galaxy encounters. All morphol…
The velocity distribution of SDSS satellites in MOND
Garry Angus, Benoit Famaey, Olivier Tiret +2
The recent SDSS measured velocity distribution of satellite galaxies has been modelled in the context of MOND. We show that even when the extra constraint of adhering to the projec…
Gaseous Flows in Galaxies
F. Combes
The gas component plays a major role in the dynamics of spiral galaxies, because of its dissipative character, and its ability to exchange angular momentum with stars in the disk.…
Molecular gas in high-velocity clouds: revisited scenario
M. Dessauges-Zavadsky, F. Combes, D. Pfenniger
We report a new search for 12CO(1-0) emission in high-velocity clouds (HVCs) performed with the IRAM 30 m telescope. This search was motivated by the recent detection of cold dust…
Molecular content of a type-Ia SN host galaxy at z=0.6
A. -L. Melchior, F. Combes
We study the properties and the molecular content of the host of a type-Ia supernova (SN1997ey). This z=0.575 host is the brightest submillimetre source of the sample of type-Ia su…
Tidal dwarf galaxies as a test of fundamental physics
G. Gentile, B. Famaey, F. Combes +3
Within the cold dark matter (CDM) framework tidal dwarf galaxies (TDGs) cannot contain dark matter, so the recent results by Bournaud et al. (2007) that 3 rotating TDGs do show sig…
Infall and accretion
F. Combes
Gas infall and accretion play a fundamental role in galaxy formation, and several processes of accretion are reviewed. In particular the cold accretion may solve to some extent the…
Loss of mass and stability of galaxies in MOND
Xufen Wu, HongSheng Zhao, Benoit Famaey +5
The self-binding energy and stability of a galaxy in MOND-based gravity are curiously decreasing functions of its center of mass acceleration towards neighbouring mass concentratio…
Molecular gas and star formation in M81
V. Casasola, F. Combes, G. Galletta +1
We present IRAM 30m observations of the central 1.6 kpc of the spiral M81 galaxy. The molecular gas appears weak and with an unusual excitation physics. We discuss a possible link…
Gas stripping in galaxy clusters: a new SPH simulation approach
P. Jachym, J. Palous, J. Koppen +1
The influence of a time-varying ram pressure on spiral galaxies in clusters is explored with a new simulation method based on the N-body SPH/tree code GADGET. We have adapted the c…
Keck spectroscopy and Spitzer Space Telescope analysis of the outer disk of the Triangulum Spiral Galaxy M33
David L. Block, Francoise Combes, Ivanio Puerari +11
In an earlier study of the spiral galaxy M33, we photometrically identified arcs or outer spiral arms of intermediate age (0.6 Gyr - 2 Gyr) carbon stars precisely at the commenceme…