A5013649235- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- History and Developments in Astronomy
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Calibration and Measurement Techniques
- CCD and CMOS Imaging Sensors
- Geophysics and Gravity Measurements
- Scientific Research and Discoveries
- Advanced Vision and Imaging
- Historical Astronomy and Related Studies
- Historical, Religious, and Philosophical Studies
- Remote Sensing in Agriculture
- Iterative Methods for Nonlinear Equations
- Impact of Light on Environment and Health
- Advanced Measurement and Detection Methods
- Phase Equilibria and Thermodynamics
Institut de Recherche en Astrophysique et Planétologie
2012-2023
Université de Toulouse
2014-2023
Université Toulouse III - Paul Sabatier
2014-2023
Centre National de la Recherche Scientifique
2012-2023
Roche (France)
2015-2017
Observatoire Midi-Pyrénées
2001-2015
Laboratoire d'Astrophysique de Bordeaux
1994-2009
Génétique et Immunologie des Maladies Parasitaires
2002-2008
Office Médico Pédagogique
1998-1999
The Multi Unit Spectroscopic Explorer (MUSE) is a second-generation VLT panoramic integral-field spectrograph currently in manufacturing, assembly and integration phase. MUSE has field of 1x1 arcmin2 sampled at 0.2x0.2 arcsec2 assisted by the ground layer adaptive optics ESO facility using four laser guide stars. instrument large 24 identical high performance integral units, each one composed an advanced image slicer, 4kx4k detector. In this paper we review progress manufacturing report...
We present a reconstruction of the mass distribution galaxy cluster Abell 1689 at z = 0.18 using detected strong lensing features from deep ACS observations and extensive ground based spectroscopy. Earlier analyses have reported up to 32 multiply imaged systems in this cluster, which only 3 were spectroscopically confirmed. In work, we parametric 34 24 newly determined spectroscopic redshifts, is major step forward building robust model. turn, new data allows more secure identification...
We present an analysis of MUSE observations obtained on the massive Frontier Fields cluster Abell 2744. This new dataset covers entire multiply-imaged region around core. measure spectroscopic redshifts for HST-selected continuum sources together with line emitters blindly detected in datacube. The combined catalog consists 514 (with 414 identifications), including 156 members and 326 magnified background sources. use this redshift information to perform a strong-lensing all multiple images...
We present an analysis of 11 bright far-IR/submm sources discovered through a combination the Planck survey and follow-up Herschel-SPIRE imaging. Each source has redshift z=2.2-3.6 obtained blind search with EMIR at IRAM 30-m telescope. Interferometry SMA, optical/near-infrared imaging CFHT VLT reveal morphologies consistent strongly gravitationally lensed sources. Additional photometry was JCMT/SCUBA-2 IRAM/GISMO 850 um 2 mm, respectively. All objects are bright, isolated point in 18 arcsec...
Spectroscopic surveys of massive galaxy clusters reveal the properties faint background galaxies, thanks to magnification provided by strong gravitational lensing. We present a systematic analysis integral-field-spectroscopy observations 12 clusters, conducted with Multi Unit Explorer (MUSE). All data were taken under very good seeing conditions (0.6") in effective exposure times between two and 15 hrs per pointing, for total 125 hrs. Our cover solid angle ~23 arcmin$^2$ direction many which...
We present a strong lensing analysis on the massive cluster Abell 370 (A370; z = 0.375), using combination of deep multi-band Hubble Space Telescope (HST) imaging and Multi-Unit Spectroscopic Explorer (MUSE) spectroscopy. From only two hours MUSE data, we are able to measure 120 redshifts in Southern BCG area, including several multiply-imaged lens systems. In total, increase number systems with secure redshift from 4 15, nine which newly discovered. Of these, eight located at > 3, greatly...
Spatially resolved studies of high-redshift galaxies, an essential insight into galaxy formation processes, have been mostly limited to stacking or unusually bright objects. We present here the study a typical (L*, M⋆ = 6 × 109 M⊙) young lensed at z 3.5, observed with Multi Unit Spectroscopic Explorer (MUSE), for which we obtain 2D spatial information Lyα and, first time, C iii] emission. The exceptional signal-to-noise ratio data reveals UV emission and absorption lines rarely seen these...
Context. Quasi-periodic eruptions (QPEs) are repeating thermal X-ray bursts associated with accreting massive black holes, the precise underlying physical mechanisms of which still unclear. Aims. We present a new candidate QPE source, AT 2019vcb (nicknamed Tormund by Zwicky Transient Facility Collaboration), was found during an archival search for QPEs in XMM-Newton archive. It first discovered 2019 as optical tidal disruption event (TDE) at z = 0.088, and its follow-up exhibited QPE-like...
Aims.We present data from the CFHTLS Strong Lensing Legacy Survey (SL2S). Due to unsurpassed combined depth, area and image quality of Canada-France-Hawaii it is becoming possible uncover a large, statistically well-defined sample strong gravitational lenses which spans dark halo mass spectrum predicted by concordance model galaxy cluster haloes.
AIMS: We present data from the CFHTLS Strong Lensing Legacy Survey (SL2S). Due to unsurpassed combined depth, area and image quality of Canada-France-Hawaii it is becoming possible uncover a large, statistically well-defined sample strong gravitational lenses which spans dark halo mass spectrum predicted by concordance model galaxy cluster haloes. METHODS: describe development several automated procedures find various regimes in images. RESULTS: The preliminary about 40 lensing candidates...
Context. Morphology is the most accessible tracer of physical structure galaxies, but its interpretation in framework galaxy evolution still remains a problem. Its dependence on wavelength renders comparison between local and high redshift populations difficult. Furthermore, quality measured morphology being strongly dependent image resolution, different surveys also
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.
Abstract We present results from MUSE spatially resolved spectroscopy of 21 post-starburst galaxies in the centers eight clusters z ∼ 0.3 to 0.4. measure star formation histories (SFHs), time since quenching ( t Q ), and fraction stellar mass assembled past 1.5 Gyr μ ). The SFHs display a clear enhancement prior for 16 out objects, with at least 10% (and up >50%) being ranging less than 100 ∼800 Myr. By mapping , we analyze patterns galaxies. Most our sample have quenched their outside or...
For the last 30 yr many observational and theoretical evidences have shown that galaxy clusters are not spherical objects, their shape is much better described by a triaxial geometry. With advent of multiwavelength data increasing quality, investigations gathering growing interest from community, especially in time 'precision cosmology'. In this work, we aim to provide first statistically significant predictions unexplored mass range above 3 × 1014 M⊙h−1, using haloes two redshift snapshots...
We present an updated strong-lensing analysis of the massive cluster Abell 370 (A370), continuing work first presented in Lagattuta et al. (2017). In this new analysis, we take advantage deeper imaging data from Hubble Space Telescope (HST) Frontier Fields program, as well a large spectroscopic mosaic obtained with Multi-Unit Spectroscopic Explorer (MUSE). Thanks to extended coverage mosaic, probe full 3D distribution galaxies field, giving us unique picture structure and its surroundings....
It remains a challenge to assess the merger fraction of galaxies at different cosmic epochs in order probe evolution their mass assembly. Using I LLUSTRIS cosmological simulation project, we investigate relation between separation pair, both velocity and projected spatial space, probability that these interacting will merge future. From this analysis, propose new set criteria select close pairs along with corrective term be applied computation galaxy fraction. We then major minor using...
We present the X-ray properties and scaling relations of a flux-limited morphology-unbiased sample 12 luminous galaxy clusters at redshift around 0.2 based on XMM-Newton observations. The scaled radial profiles are characterized by self-similar behavior radii outside cluster cores (>) for temperature (), surface brightness, entropy gas mass total mass. contribute up to 70% bolometric luminosity. their scatter sensitive presence cool cores. Using luminosity corrected central region measured...
Aims.We present a wide-field multi-color survey of homogeneous sample eleven clusters galaxies for which we measure total masses and mass distributions from weak lensing. This sample, spanning small range in both X-ray luminosity redshift, is ideally suited to determining the normalisation scaling relations between properties their (the relations) also estimating scatter these at fixed luminosity.
The existence of strong lensing systems with Einstein radii covering the full mass spectrum, from <i>∼<i/> (produced by galaxy scale dark matter haloes) to > cluster have long been predicted. Many lenses around and above reported but very few in between. In this article, we present a sample 13 range (or image separations ), i.e. produced <i>galaxy group haloes<i/>. This spans redshift 0.3 0.8. opens new window exploration 10<sup>13<sup/>–10<sup>14<sup/> , crucial for understanding transition...
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...
ABSTRACT We have discovered an overdensity of Hα-emitting galaxies associated with a Planck compact source in the COSMOS field (PHz G237.0+42.5) through narrow-band imaging observations Subaru Multi-Object InfraRed Camera and Spectrograph (MOIRCS). This Planck-selected dusty proto-cluster at z = 2.16 has 38 Hα emitters including six spectroscopically confirmed observed MOIRCS 4 × 7 arcmin2 (corresponding to ∼2.0 3.5 Mpc2 physical scale). find that massive log (M⋆/M⊙) &gt;10.5 are...