A5068252137- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Adaptive optics and wavefront sensing
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Radio Astronomy Observations and Technology
- Cultural Insights and Digital Impacts
- CCD and CMOS Imaging Sensors
- Dark Matter and Cosmic Phenomena
- Spectroscopy and Laser Applications
- Scientific Research and Discoveries
- Plant Water Relations and Carbon Dynamics
- Geophysics and Gravity Measurements
- Remote Sensing in Agriculture
- Calibration and Measurement Techniques
- Molecular Junctions and Nanostructures
- Semiconductor Quantum Structures and Devices
- Advanced Fiber Laser Technologies
- Cosmology and Gravitation Theories
Centre National de la Recherche Scientifique
2015-2024
Centre de Recherche Astrophysique de Lyon
2018-2024
Université Claude Bernard Lyon 1
2013-2024
École Normale Supérieure de Lyon
2018-2024
Observatoire de Lyon
2024
Université Jean Moulin Lyon III
2013-2020
Équipe de droit international, européen et comparé
2011-2020
Université de Toulouse
2011-2019
Université Toulouse III - Paul Sabatier
2011-2019
Institut de Recherche en Astrophysique et Planétologie
2011-2019
We present the Spectroscopic Imaging survey in near-infrared (near-IR) with SINFONI (SINS) of high-redshift galaxies. With 80 objects observed and 63 detected at least one rest-frame optical nebular emission line, mainly Hα, SINS represents largest spatially resolved gas kinematics, morphologies, physical properties star-forming galaxies z ∼ 1–3. describe selection targets, observations, data reduction. then focus on "SINS Hα sample," consisting 62 rest-UV/optically selected sources 1.3 <...
We use the first systematic data sets of CO molecular line emission in z∼ 1–3 normal star-forming galaxies (SFGs) for a comparison dependence galaxy-averaged star formation rates on gas masses at low and high redshifts, different galactic environments. Although current high-z samples are still small biased towards luminous massive tail actively ‘main-sequence’, fairly clear picture is emerging. Independent whether galaxy-integrated quantities or surface densities considered, low- SFG...
This paper provides an update of our previous scaling relations (Genzel et al.2015) between galaxy integrated molecular gas masses, stellar masses and star formation rates, in the framework main-sequence (MS), with main goal to test for possible systematic effects. For this purpose new study combines three independent methods determining from CO line fluxes, far-infrared dust spectral energy distributions, ~1mm photometry, a large sample 1444 forming galaxies (SFGs) z=0 4. The covers mass...
We combine molecular gas masses inferred from CO emission in 500 star-forming galaxies (SFGs) between z = 0 and 3, the IRAM-COLDGASS, PHIBSS1/2, other surveys, with derived Herschel far-IR dust measurements 512 galaxy stacks over same stellar mass/redshift range. constrain scaling relations of depletion timescale (tdepl) to mass ratio (Mmol gas/M*) SFGs near star formation "main-sequence" redshift, specific star-formation rate (sSFR), (M*). The CO- dust-based agree remarkably well. This...
We present Hα integral field spectroscopy of well-resolved, UV/optically selected z ∼ 2 star-forming galaxies as part the SINS survey with SINFONI on ESO VLT. Our laser guide star adaptive optics and good seeing data show presence turbulent rotating outer rings/disks, plus central bulge/inner disk components, whose mass fractions relative to total dynamical appear scale [N II]/Hα flux ratio formation age. propose that buildup disks bulges massive at can be driven by early secular evolution...
This White Paper, submitted to the recent ESA call for science themes define its future large missions, advocates need a transformational leap in our understanding of two key questions astrophysics: 1) How does ordinary matter assemble into scale structures that we see today? 2) do black holes grow and shape Universe? Hot gas clusters, groups intergalactic medium dominates baryonic content local Universe. To understand astrophysical processes responsible formation assembly these structures,...
We have studied the properties of giant star-forming clumps in five z ∼ 2 disks with deep SINFONI AO spectroscopy at ESO VLT. The reside disk regions where Toomre Q-parameter is below unity, consistent their being bound and having formed from gravitational instability. Broad Hα/[N ii] line wings demonstrate that are launching sites powerful outflows. inferred outflow rates comparable to or exceed star formation rates, one case by a factor eight. Typical may lose fraction original gas...
We present 0.5" resolution near-IR integral field spectroscopy of the Ha line emission 14 z~2 UV-selected BM/BX galaxies obtained with SINFONI at ESO/VLT. The mean half-light radius r_1/2 is about 4kpc and detected over > ~20kpc in several sources. In 9 sources, we detect spatially-resolved velocity gradients, from 40 to 410 km/s ~10kpc. observed kinematics larger systems are consistent orbital motions. Four well described by rotating disks clumpy morphologies extract rotation curves out...
We present the MUSE Hubble Ultra Deep Survey, a mosaic of nine fields covering 90\% entire HUDF region with 10-hour deep exposure time, plus deeper 31-hour in single 1.15 arcmin2 field. The improved observing strategy and advanced data reduction results datacubes sub-arcsecond spatial resolution (0.65 arcsec at 7000 A) accurate astrometry (0.07 rms). compare broadband photometric properties to HST photometry, finding good agreement zeropoint up mAB=28 but an increasing scatter for faint...
We use the first systematic samples of CO millimeter emission in z>1 'main-sequence' star forming galaxies (SFGs) to study metallicity dependence conversion factor {\alpha}CO, from line luminosity molecular gas mass. The depletion rate inferred ratio formation (SFR) luminosity, is ~1 Gyr-1 for near-solar with stellar masses above M_S~1e11 M_sun. In this regime does not vary more than a two three as function surface density, or redshift between z~0 and 2. Below M_S increases rapidly...
Background quasars are potentially sensitive probes of galactic outflows provided that one can determine the origin absorbing material since both gaseous disks and strong bipolar contribute to absorption cross-section. Using a dozen passing near spectroscopically identified galaxies at $z\sim0.1$, we find azimuthal orientation quasar sight-lines with MgII (with EW>0.3 \AA) is bi-modal: about half aligned major axis other within 30deg. minor axis, showing significantly This bi-modality also...
Galaxies are thought to be fed by the continuous accretion of intergalactic gas, but direct observational evidence has been elusive. The accreted gas is expected orbit about galaxy's halo, delivering not just fuel for star-formation also angular momentum galaxy, leading distinct kinematic signatures. Here we report observations showing these signatures near a typical distant star-forming galaxy where detected using background quasar passing 26 kpc from host. Our indicate that plays major...
We present a simple set of kinematic criteria that can distinguish between galaxies dominated by ordered rotational motion and those involved in major merger events. Our are based on the dynamics warm ionized gas (as traced Hα) within galaxies, making this analysis accessible to high-redshift systems, whose kinematics primarily traceable through emission features. Using method kinemetry (developed Krajnović coworkers), we quantify asymmetries both velocity dispersion maps gas, resulting...
We present the modeling of SINFONI integral field dynamics 18 star forming galaxies at z ~ 2 from Halpha line emission. The are selected larger sample SINS survey, based on prominence ordered rotational motions with respect to more complex merger induced dynamics. quality data allows us carefully select systems kinematics dominated by rotation, and model gas across whole galaxy using suitable exponential disk models. obtain a good correlation between dynamical mass stellar mass, finding that...
We study the properties of luminous stellar "clumps" identified in deep, high-resolution Hubble Space Telescope NIC2/F160W imaging at 1.6 μm six z ∼ 2 star-forming galaxies with existing near-infrared integral field spectroscopy from SINFONI Very Large Telescope. Individual clumps contribute ∼0.5%–15% galaxy-integrated rest-frame ≈5000 Å emission, median ≈2%; total contribution clump light ranges 10% to 25%. The intrinsic size and mass are ∼1 kpc ∼109 M☉, for rest-UV or line emission other...
We report the detection of extended Lyα emission around individual star-forming galaxies at redshifts z = 3−6 in an ultradeep exposure Hubble Deep Field South obtained with MUSE on ESO-VLT. The data reach a limiting surface brightness (1σ) ~1 × 10-19 erg s-1 cm-2 arcsec-2 azimuthally averaged radial profiles, order magnitude improvement over previous narrowband imaging. Our sample consists 26 spectroscopically confirmed Lyα-emitting, but mostly continuum-faint (mAB ≳ 27) galaxies. In most...
Using SINFONI Hα, [N ii], and [S ii] AO data of 27 z ∼ 2 star-forming galaxies (SFGs) from the SINS zC-SINF surveys, we explore dependence outflow strength (via broad flux fraction) on various galaxy parameters. For that have evidence for strong outflows, find emission is spatially extended to at least half-light radius (∼a few kpc). Decomposition doublet into narrow components suggests this outflowing gas probably has a density ∼10–100 cm−3, less than (600 cm−3). There correlation Hα...
Recent observations of UV-/optically selected, massive star forming galaxies at z~2 indicate that the baryonic mass assembly and formation history is dominated by continuous rapid accretion gas internal secular evolution, rather than major mergers. We use Millennium Simulation to build new halo merger trees, extract fractions rates. find even for halos not undergoing mergers rates are plausibly sufficient account high observed in disks. On other hand, fraction number counts submillimeter...
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 present deep and high-resolution HST/NIC2 F160W imaging at 1.6micron of six z~2 star-forming galaxies with existing near-IR integral field spectroscopy from SINFONI the VLT. The unique combination rest-frame optical nebular emission-line maps provides simultaneous insight into morphologies dynamical properties. overall emission is characterized by shallow profiles in general (Sersic index n<1), median effective radii ~5kpc. are significantly clumpy irregular, which we quantify through a...