A5105931540- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Scientific Research and Discoveries
- Spectroscopy and Laser Applications
- CCD and CMOS Imaging Sensors
- Pulsars and Gravitational Waves Research
- Remote Sensing in Agriculture
- Phase Equilibria and Thermodynamics
- Cosmology and Gravitation Theories
- Control Systems and Identification
- Laser-Plasma Interactions and Diagnostics
- Isotope Analysis in Ecology
- Statistical and numerical algorithms
- Mass Spectrometry Techniques and Applications
- Neutrino Physics Research
- Analytical Chemistry and Chromatography
- Sensor Technology and Measurement Systems
- Forensic Toxicology and Drug Analysis
- Satellite Image Processing and Photogrammetry
Centre National de la Recherche Scientifique
2014-2023
Université de Toulouse
2016-2023
Université Toulouse III - Paul Sabatier
2015-2023
Institut de Recherche en Astrophysique et Planétologie
2015-2023
Stockholm University
2018-2019
AlbaNova
2018-2019
Institut d'Astrophysique de Paris
2012-2015
Sorbonne Université
2012-2015
Drexel University
2011
Virginia Department of Forensic Science
1992
The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using original SDSS wide-field imager, and an upgraded multi-object fiber-fed optical spectrograph, a new near-infrared high-resolution novel interferometer. All SDSS-III are now made public. In particular, this paper describes Data Release 11 (DR11) including all acquired through 2013 July, 12 (DR12) adding July (including included in previous releases), marking end observing. Relative our public...
ABSTRACT The Sloan Digital Sky Survey III (SDSS-III) presents the first spectroscopic data from Baryon Oscillation Spectroscopic (BOSS). This ninth release (DR9) of SDSS project includes 535,995 new galaxy spectra (median z ∼ 0.52), 102,100 quasar 2.32), and 90,897 stellar spectra, along with presented in previous releases. These were obtained BOSS spectrograph taken between 2009 December 2011 July. In addition, parameters pipeline, which determines radial velocities, surface temperatures,...
The Baryon Oscillation Spectroscopic Survey (BOSS) is designed to measure the scale of baryon acoustic oscillations (BAO) in clustering matter over a larger volume than combined efforts all previous spectroscopic surveys large-scale structure. BOSS uses 1.5 million luminous galaxies as faint i = 19.9 10,000 deg2 BAO redshifts z < 0.7. Observations neutral hydrogen Lyα forest more 150,000 quasar spectra (g 22) will constrain redshift range 2.15 3.5. Early results from include first detection...
The Sloan Digital Sky Survey (SDSS) has been in operation since 2000 April. This paper presents the Tenth Public Data Release (DR10) from its current incarnation, SDSS-III. data release includes first spectroscopic Apache Point Observatory Galaxy Evolution Experiment (APOGEE), along with Baryon Oscillation Spectroscopic (BOSS) taken through 2012 July. APOGEE instrument is a near-infrared R ∼ 22,500 300 fiber spectrograph covering 1.514–1.696 μm. survey studying chemical abundances and radial...
We present the first results from an ongoing survey for damped Lyman-α systems (DLAs) in spectra of z > 2 quasars observed course Baryon Oscillation Spectroscopic Survey (BOSS), which is part Sloan Digital Sky (SDSS) III. Our full (non-statistical) sample, based on Data Release 9, comprises 12 081 with log N(H i) ≥ 20, out 6839 have 20.3. This largest DLA sample ever compiled, superseding that SDSS-II by a factor seven.
We present the Data Release 9 Quasar (DR9Q) catalog from Baryon Oscillation Spectroscopic Survey (BOSS) of Sloan Digital Sky III. The includes all BOSS objects that were targeted as quasar candidates during survey, are spectrocopically confirmed quasars via visual inspection, have luminosities Mi[z=2]<-20.5 (in a $\Lambda$CDM cosmology with H0 = 70 km/s/Mpc, $\Omega_{\rm M}$ 0.3, and $\Omega_{\Lambda}$ 0.7) either display at least one emission line full width half maximum (FWHM) larger than...
We present the Data Release 10 Quasar (DR10Q) catalog from Baryon Oscillation Spectroscopic Survey (BOSS) of Sloan Digital Sky III. The includes all BOSS objects that were targeted as quasar candidates during first 2.5 years survey and are confirmed quasars via visual inspection spectra. also known (mostly SDSS-I II) reobserved by BOSS. contains 166,583 (74,454 new discoveries since SDSS-DR9) detected over 6,373 deg$^{2}$ with robust identification redshift measured a combination principal...
Direct Ly $\alpha$ imaging of intergalactic gas at $z\sim2$ has recently revealed giant cosmological structures around quasars, e.g. the Slug Nebula (Cantalupo et al. 2014). Despite their high luminosity, detection rate such systems in narrow-band and spectroscopic surveys is less than 10%, possibly encoding crucial information on distribution quasars quasar emission properties. In this study, we use MUSE integral-field instrument to perform a blind survey for nebulae 17 bright radio-quiet...
We have conducted a two-layered spectroscopic survey (1'x1' ultra deep and 3'x3' regions) in the Hubble Ultra Deep Field (HUDF) with Multi Unit Spectroscopic Explorer (MUSE). The combination of large field view, high sensitivity, wide wavelength coverage provides an order magnitude improvement spectroscopically confirmed redshifts HUDF; i.e., 1206 secure for HST continuum selected objects, which corresponds to 15% total (7904). redshift distribution extends well beyond z>3 HST/F775W...
We use the MusE GAs FLOw and Wind (MEGAFLOW) survey to study kinematics of extended disk-like structures cold gas around $z\approx1$ star-forming galaxies. The combination VLT/MUSE VLT/UVES observations allows us connect measured through MgII quasar absorption spectroscopy orientation associated galaxies constrained integral field spectroscopy. Confirming previous results, we find that galaxy-absorber pairs MEGAFLOW follow a strong bimodal distribution, consistent with picture being...
We use a background quasar to detect the presence of circum-galactic gas around $z=0.91$ low-mass star forming galaxy. Data from new Multi Unit Spectroscopic Explorer (MUSE) on VLT show that host galaxy has dust-corrected star-formation rate (SFR) 4.7$\pm$0.2 Msun/yr, with no companion down 0.22 Msun/yr (5 $\sigma$) within 240 kpc (30"). Using high-resolution spectrum (UVES) quasar, which is fortuitously aligned major axis (with an azimuth angle $\alpha$ only $15^\circ$), we find, in...
ABSTRACT The physical properties of galactic winds are one the keys to understand galaxy formation and evolution. These can be constrained thanks background quasar lines sight (LOS) passing near star-forming galaxies (SFGs). We present first results MusE GAs FLOw Wind survey obtained from two fields, which have eight Mg ii absorbers three rest equivalent width greater than 0.8 Å. With new Multi Unit Spectroscopic Explorer (MUSE) spectrograph on Very Large Telescope (VLT), we detect six (75%)...
We present a study of ~100 high redshift (z~2-4) extremely strong damped Lyman-alpha systems (ESDLA, with N(HI)>0.5x10^22 cm^-2) detected in quasar spectra from the Baryon Oscillation Spectroscopic Survey SDSS-III DR11. neutral hydrogen, metal, and dust content this elusive population absorbers confirm our previous finding that column density end N(HI) frequency distribution has relatively shallow slope power-law index -3.6, similar to what is seen 21-cm maps nearby galaxies. The stacked...
Aims. Whereas the evolution of gas kinematics massive galaxies is now relatively well established up to redshift z ~ 3, little known about lower mass (M⋆≤ 1010M⊙) galaxies. We use MUSE, a powerful wide-field, optical integral-field spectrograph (IFS) recently mounted on VLT, characterize this galaxy population at intermediate redshift.
Galaxies at low-redshift typically possess negative gas-phase metallicity gradients (centres more metal-rich than their outskirts). Whereas, it is not uncommon to observe positive in higher-redshift galaxies ($z \gtrsim 0.6$). Bridging these epochs, we present of 84 star-forming between $0.08 < z 0.84$. Using the with reliably determined gradients, measure median gradient be ($-0.039^{+0.007}_{-0.009}$ dex/kpc). Underlying this, however, significant scatter: $(8\pm3)\%\ [7]$ have...
We report the first detection of asymmetry in a supernova (SN) photosphere based on SN light echo (LE) spectra Cas A from different perspectives dust concentrations its LE ellipsoid. New LEs are reported difference images, and optical these analyzed compared. After properly accounting for effects finite dust-filament extent inclination, we find one field where He I H alpha features blueshifted by an additional ~4000 km/s relative to other Type IIb 1993J. That same direction does not show any...
The physical properties of galactic winds are paramount importance for our understanding galaxy formation. Fortunately, they can be constrained using background quasars passing near star-forming galaxies (SFGs). From the 14 quasar$-$galaxy pairs in VLT/SINFONI Mgii Program Line Emitters (SIMPLE) sample, we reobserved 10 brightest H$_{\alpha}$ with 0.7" seeing and corresponding quasar VLT/UVES spectrograph. Applying geometrical arguments to these ten pairs, find that four likely probing...
Emission signatures from galactic winds provide an opportunity to directly map the outflowing gas, but this is traditionally challenging because of low surface brightness. Using deep observations (27 hours) Hubble Deep Field South Multi Unit Spectroscopic Explorer (MUSE) instrument, we identify outflow in both emission and absorption a spatially resolved galaxy at z = 1.29 with stellar mass M* 8 x 10^9 Msun, star formation rate SFR 77 Msun/yr, brightness 1.6 Msun/kpc^2 within [OII]...
Recent theoretical models suggest that the early phase of galaxy formation could involve an epoch when galaxies are gas-rich but inefficient at forming stars: a "dark galaxy" phase. Here, we report results our MUSE (Multi Unit Spectroscopic Explorer) survey for dark fluorescently illuminated by quasars $z>3$. Compared to previous studies which based on deep narrow-band (NB) imaging, integral field provides nearly uniform sensitivity coverage over large volume in redshift space around as well...
We analyse a sample of 8 highly magnified galaxies at redshift 0.6<z<1.5 observed with MUSE, exploring the resolved properties these sub-kiloparsec scales. Combining multi-band HST photometry and MUSE spectra, we derive stellar mass, global star formation rates, extinction metallicity from multiple nebular lines, concluding that our is representative z~1 star-forming galaxies. 2D kinematics [OII] emission model it new method accounts for lensing effects fits images simultaneously. use models...
We searched quasar spectra from the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS) for rare occurrences where a strong damped Lyman-α absorber (DLA) blocks Broad Line Region emission and acts as natural coronagraph to reveal narrow Lyα host galaxy. define statistical sample of 31 DLAs in Data Release 9 (DR9) with log N(H i) ≥ 21.3 cm-2 located at less than 1500 km s-1 redshift. In 25% (8) these DLAs, line is observed flux ~25 × 10-17 erg on average. For without this feature their...
The physical origin of the near-ultraviolet MgII emission remains an under-explored domain, contrary to more typical lines detected in spectra star-forming galaxies. We explore nebular and properties for a sample 381 galaxies between 0.70 < z 2.34 drawn from MUSE Hubble Ultra Deep Survey. these show wide variety profiles 2796,2803 resonant doublet, absorption emission. present study on main drivers detection galaxy spectra. By exploiting photoionization models we verified that...