A5030706214- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Astronomical Observations and Instrumentation
- Tribology and Lubrication Engineering
- Remote Sensing in Agriculture
- Human Pose and Action Recognition
- Radio Astronomy Observations and Technology
- Human Motion and Animation
- Mechanics and Biomechanics Studies
- Astrophysics and Star Formation Studies
- Gait Recognition and Analysis
Inter-University Centre for Astronomy and Astrophysics
2005-2009
Délégation Paris 7
2008
Centre National de la Recherche Scientifique
2008
Galaxies, Etoiles, Physique et Instrumentation
2005-2008
Observatoire de Paris
2005-2008
Université Paris Cité
2008
Using the multi-integral field spectrograph GIRAFFE at VLT, we have derived K-band Tully-Fisher relation (TFR) for a representative sample of 65 galaxies with emission lines ( Å). We confirm that scatter in TFR is caused by anomalous kinematics, and find positive strong correlation between complexity kinematics they contribute to TFR. Considering only relaxed-rotating disks, scatter, possibly also slope, TFR, do not appear evolve redshift. detect an evolution zero point , which, if...
Context.This paper prepares a series of papers analysing the Intermediate MAss Galaxy Evolution Sequence (IMAGES) up to redshift one. mass galaxies () are selected from Chandra Deep Field South (CDFS) for which we identify serious lack spectroscopically determined redshifts.
Nearly half the stellar mass of present-day spiral galaxies has formed since , and galaxy kinematics is an ideal tool to identify underlying mechanisms responsible for assembly that epoch. Here, we present first results ESO large program, "IMAGES", which aims at obtaining robust measurements distant using multi-IFU mode GIRAFFE on VLT. 3D spectroscopy essential robustly measure often distorted (e.g., Flores et al. 2006, A&A, 455, 107). We derive velocity fields σ-maps 36 from [ O ii]...
We present a first combined analysis of the morphological and dynamical properties for Intermediate MAss Galaxy Evolution Sequence (IMAGES) sample. It is representative sample 52 z~0.6 galaxies with Mstell from 1.5 to 15 10^10Msun possessing 3D resolved kinematics HST deep imaging in at least two broad band filters. aim evaluate robustly evolution rotating spirals since z~0.6, as well test different schemes classifying morphologically. used all information provided by multi-band images,...
Context. Intermediate mass galaxies (> 1010 ) at z ~ 0.6 are the likeliest progenitors of present-day, numerous population spirals. There is growing evidence that they have evolved rapidly in last 6 to 8 Gyr, and likely already formed a significant fraction their stellar mass, often showing perturbed morphologies kinematics.
We use a combination of deep, high angular resolution imaging data from the CDFS (HST/ACS GOODS survey) and ground-based near-IR Ks images to derive evolution galaxy major merger rate in redshift range 0.2 ⩽ z⩽ 1.2. select galaxies solely on basis their J-band rest-frame absolute magnitude, which is good tracer stellar mass. find steep with redshift, ∝(1 + z)3.43 ± 0.49 for optically selected pairs z)2.18 0.18 near-IR. Our result unlikely be affected by luminosity that relatively modest when...
To address how the galaxy Hubble sequence is established and what physical processes are involved, we studied morphological properties internal structures of field galaxies in past (0.4<z<1). In addition to structural parameters derived from bulge+disk decomposition, Zheng et al. (2004) introduced color maps recognizing properly classified morphologies 36 luminous infrared (LIRGs, Lir(8-1000um)>=10^11 L_sun). Here presented classification a parallel 75 non-LIRG sample. Our examination...
Context.Luminous Compact Galaxies (LCGs) (, 4.5 kpc and EW0(OII) ≥ 15 Å) constitute one of the most rapidly evolving galaxy populations over last ~8 Gyr history universe. Due to their inherently compact sizes, any detailed quantitative analysis morphologies has proved be difficult in past. Hence, thereby local counterparts these enigmatic sources have been hotly debated.
We show a comparison of the rest-frame UV morphologies sample 162 intermediate-redshift (zmedian = 1.02) galaxies with their optical morphologies. select our from deepest near-UV image obtained Hubble Space Telescope (HST) using Wide Field Planetary Camera 2 (WFPC2; F300W) as part parallel observations Ultra Deep campaign overlapping HST/ACS Great Observatories Origins Survey data set. perform single-component Sérsic fits in both WFPC2/F300W (rest-frame UV) and ACS/F850LP optical) bands...
Abstract We use a combination of deep, high angular resolution imaging data from the HST/ACS GOODS survey and ground based near-IR K s images to derive evolution galaxy major merger rate in redshift range 0.2 ≤ z 1.2. select galaxies on sole basis their J-band rest-frame, absolute magnitude, which is good tracer stellar mass. find steep with redshift, ∝ (1+ ) 2.44±0.39 for optically selected pairs, 2.07±0.74 pairs near-IR. Our result unlikely affected by luminosity relatively modest when...