M. Salvato
A5039049327- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- Radio Astronomy Observations and Technology
- CCD and CMOS Imaging Sensors
- Calibration and Measurement Techniques
- Adaptive optics and wavefront sensing
- Geophysics and Gravity Measurements
- Cosmology and Gravitation Theories
- Scientific Research and Discoveries
- Pulsars and Gravitational Waves Research
- Astro and Planetary Science
- Remote Sensing in Agriculture
- Solar and Space Plasma Dynamics
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Advanced Vision and Imaging
- Plant Water Relations and Carbon Dynamics
- Mechanics and Biomechanics Studies
- Nuclear Physics and Applications
California Institute of Technology
2006-2024
Max Planck Institute for Extraterrestrial Physics
2015-2024
Excellence Cluster Origins
2021-2024
Western Washington University
2024
University of Tübingen
2024
University of Warwick
2024
Excellence Cluster Universe
2011-2021
Max Planck Society
2010-2021
Max Planck Institute for Plasma Physics
2011-2020
Bayer (Germany)
2018-2019
AGN are known to have complex X-ray spectra that depend on both the properties of accreting SMBH (e.g. mass, accretion rate) and distribution obscuring material in its vicinity ("torus"). Often however, simple even unphysical models adopted represent AGN. In case blank field surveys particular, this should an impact e.g. determination luminosity function, inferred history Universe also our understanding relation between their host galaxies. We develop a Bayesian framework for model...
ABSTRACT We present the COSMOS2015 24 catalog, which contains precise photometric redshifts and stellar masses for more than half a million objects over 2deg 2 COSMOS field. Including new <?CDATA ${{YJHK}}_{{\rm{s}}}$?> images from UltraVISTA-DR2 survey, Y-band Subaru/Hyper-Suprime-Cam, infrared data Spitzer Large Area Survey with Hyper-Suprime-Cam legacy program, this near-infrared-selected catalog is highly optimized study of galaxy evolution environments in early universe. To maximize...
We present accurate photometric redshifts (photo-z) in the 2-deg2 COSMOS field. The are computed with 30 broad, intermediate, and narrowbands covering UV (Galaxy Evolution Explorer), visible near-IR (NIR; Subaru, Canada–France–Hawaii Telescope (CFHT), United Kingdom Infrared Telescope, National Optical Astronomy Observatory), mid-IR (Spitzer/IRAC). A χ2 template-fitting method (Le Phare) was used calibrated large spectroscopic samples from Very Large Visible Multi-Object Spectrograph Keck...
We present imaging data and photometry for the COSMOS survey in 15 photometric bands between 0.3 2.4 μm. These include taken on Subaru 8.3 m telescope, KPNO CTIO 4 telescopes, CFHT 3.6 telescope. Special techniques are used to ensure that relative calibration is better than 1% across field of view. The absolute accuracy from standard-star measurements found be 6%. corrected using galaxy spectra, providing colors accurate 2% or better. Stellar counts agree well with expected values. Finally,...
eROSITA (extended ROentgen Survey with an Imaging Telescope Array) is the primary instrument on Spectrum-Roentgen-Gamma (SRG) mission, which was successfully launched July 13, 2019, from Baikonour cosmodrome. After commissioning of and a subsequent calibration performance verification phase, started survey entire sky December 2019. By end 2023, eight complete scans celestial sphere will have been performed, each lasting six months. At this program, all-sky in soft X-ray band (0.2--2.3\,keV)...
We estimate the galaxy stellar mass function and density for star-forming quiescent galaxies with 0.2<z<4. construct a deep K<24 sample of 220000 selected using UltraVISTA DR1 data release. Our analysis is based on precise 30-band photometric redshifts. By comparing these redshifts 10800 spectroscopic from zCOSMOS bright faint surveys, we find precision sigma(dz/(1+z))=0.008 at i<22.5 sigma(dz/(1+zs))=0.03 1.5<z<4. derive correct Eddington bias. mass-dependent evolution global populations....
We follow the galaxy stellar mass assembly by morphological and spectral type in COSMOS 2 deg2 field. derive functions densities from z = to 0.2 using 196,000 galaxies selected at F3.6 μm > 1 μJy with accurate photometric redshifts ( i+ < 22.5). Using a classification, we find that ∼ is an epoch of transition quiescent galaxies. Their density increases 1.1 dex between 1.5–2 0.8–1 (Δt 2.5 Gyr), but only 0.3 0.1 6 Gyr). Then, add information 80%–90% massive have elliptical morphology 0.8....
We explore the redshift evolution of specific star formation rate (SSFR) for galaxies different stellar mass by drawing on a deep 3.6 μm selected sample >105 in 2 deg2 COSMOS field. The average (SFR) subsets these is estimated with stacked 1.4 GHz radio continuum emission. separately consider total and subset that shows evidence substantive recent rest-frame optical spectral energy distributions. At redshifts 0.2 < z 3 both populations show strong mass-independent decrease their SSFR toward...
The Spitzer-COSMOS survey (S-COSMOS) is a Legacy program (Cycles 2+3) designed to carry out uniform deep of the full 2 sq deg COSMOS field in all seven Spitzer bands (3.6, 4.5, 5.6, 8.0, 24.0, 70.0, 160.0 u). This paper describes parameters, mapping strategy, data reduction procedures, achieved sensitivities date, and complete set for future reference. We show that observed infrared backgrounds S-COSMOS are within 10% predicted background levels. fluctuations at 24u have been measured do not...
We present spectroscopic redshifts of a large sample galaxies with IAB < 22.5 in the COSMOS field, measured from spectra 10,644 objects that have been obtained first two years observations zCOSMOS-bright redshift survey. These include statistically complete subset 10,109 objects. The average accuracy individual is 110 km s−1, independent redshift. reliability described by Confidence Class has empirically calibrated through repeat over 600 galaxies. There very good agreement between and...
Spitzer IRAC selection is a powerful tool for identifying luminous AGN. For deep data, however, the AGN wedges currently in use are heavily contaminated by star-forming galaxies, especially at high redshift. Using large samples of and high-redshift galaxies COSMOS, we redefine criteria surveys. The new designed to be both highly complete reliable, incorporate best aspects current infrared power-law while excluding redshift selected via BzK, DRG, LBG, SMG criteria. At QSO-luminosities log...
We present a UV-to-mid infrared multi-wavelength catalog in the CANDELS/GOODS-S field, combining newly obtained CANDELS HST/WFC3 F105W, F125W, and F160W data with existing public data. The is based on source detection WFC3 band. mosaic includes from deep wide observations as well previous ERS HUDF09 programs. reaches 5$\sigma$ limiting depth (within an aperture of radius 0.17 arcsec) 27.4, 28.2, 29.7 AB for wide, deep, HUDF regions, respectively. contains 34930 sources representative 50%...
eROSITA is the primary instrument on Russian SRG mission. In first four years of scientific operation after its launch, foreseen for 2014, it will perform a deep survey entire X-ray sky. soft band (0.5-2 keV), this be about 20 times more sensitive than ROSAT all sky survey, while in hard (2-10 keV) provide ever true imaging at those energies. Such all-sky revolutionize our view high-energy sky, and calls major efforts synergic, multi-wavelength wide area surveys order to fully exploit...
The COSMOS-Legacy survey is a 4.6 Ms Chandra program that has imaged 2.2 deg$^2$ of the COSMOS field with an effective exposure $\simeq$160 ks over central 1.5 and $\simeq$80 in remaining area. combination 56 new observations, obtained as X-ray Visionary Project, previous C-COSMOS survey. We describe reduction analysis observations properties 2273 point sources detected above spurious probability 2$\times 10^{-5}$. also present updated data. whole includes 4016 (3814, 2920 2440 full, soft...
We combine high-resolution HST/WFC3 images with multi-wavelength photometry to track the evolution of structure and activity massive (log(M*) > 10) galaxies at redshifts z = 1.4 - 3 in two fields Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS). detect compact, star-forming (cSFGs) whose number densities, masses, sizes, star formation rates qualify them as likely progenitors quiescent, (cQGs) 1.5 3. At 2 most cSFGs have specific star-formation (sSFR 10^-9 yr^-1) half...
The Chandra COSMOS Survey (C-COSMOS) is a large, 1.8 Ms, Chandra} program that has imaged the central 0.5 sq.deg of field (centered at 10h, +02deg) with an effective exposure ~160ksec, and outer 0.4sq.deg. area ~80ksec. limiting source detection depths are 1.9e-16 erg cm(-2) s(-1) in Soft (0.5-2 keV) band, 7.3e(-16) cm^-2 s^-1 Hard (2-10 5.7e(-16) Full (0.5-10 band. Here we describe strategy, design execution C-COSMOS survey, present catalog 1761 point sources detected probability being...
Using data from the COSMOS survey, we perform first joint analysis of galaxy-galaxy weak lensing, galaxy spatial clustering, and number densities. Carefully accounting for sample variance scatter between stellar halo mass, model all three observables simultaneously using a novel self-consistent theoretical framework. Our results provide strong constraints on shape redshift evolution stellar-to-halo mass relation (SHMR) z=0.2 to z=1. At low find that scales as Mh M*^0.46 this scaling does not...
We present the final Sloan Digital Sky Survey IV (SDSS-IV) quasar catalog from Data Release 16 of extended Baryon Oscillation Spectroscopic (eBOSS). This comprises largest selection spectroscopically confirmed quasars to date. The full includes two sub-catalogs: a "superset" all SDSS-IV/eBOSS objects targeted as containing 1,440,615 observations and quasar-only 750,414 quasars, including 225,082 new appearing in an SDSS data release for first time, well known SDSS-I/II/III. automated...
We present ground-based spectroscopic verification of 6 Y dwarfs (see also Cushing et al.), 89 T dwarfs, 8 L and 1 M dwarf identified by the Wide-field Infrared Survey Explorer (WISE). Eighty these are cold brown with spectral types ⩾T6, six which have been announced earlier Mainzer al. Burgasser color–color color–type diagrams showing locus M, L, T, in WISE color space. Near-infrared and, a few cases, optical spectra presented for discoveries. classifications as late early objects peculiar...
We have analyzed the redshift-dependent fraction of galactic bars over 0.2
Bolometric luminosities and Eddington ratios of both X-ray selected broad-line (Type-1) narrow-line (Type-2) AGN from the XMM-Newton survey in COSMOS field are presented. The sample is composed by 929 (382 Type-1 547 Type-2 AGN) it covers a wide range redshifts, absorbing column densities. About 65% sources spectroscopically identified as either or (83% 52% respectively), while accurate photometric redshifts available for rest sample. study such large with high quality multi-wavelength...
What is the relevance of major mergers and interactions as triggering mechanisms for active galactic nuclei (AGNs) activity? To answer this long-standing question, we analyze 140 XMM-Newton-selected AGN host galaxies a matched control sample 1264 inactive over z ∼ 0.3–1.0 M* < 1011.7 M☉ with high-resolution Hubble Space Telescope/Advanced Camera Surveys imaging from COSMOS field. The visual analysis their morphologies by 10 independent human classifiers yields measure fraction distorted in...
We measure the stellar mass function (SMF) and density of galaxies in COSMOS field up to z ~ 6. select them near-IR bands COSMOS2015 catalogue, which includes ultra-deep photometry from UltraVISTA-DR2, SPLASH, Subaru/Hyper Suprime-Cam. At > 2.5 we use new precise photometric redshifts with error σ = 0.03(1 + ) an outlier fraction 12%, estimated by means unique spectroscopic sample (~100 000 measurements total, more than one thousand having robust spec 2.5). The increased exposure time...
We present photometric redshifts and spectral energy distribution (SED) classifications for a sample of 1542 optically identified sources detected with XMM in the COSMOS field. Our template fitting classifies 46 as stars 464 nonactive galaxies, while remaining 1032 require templates an active galactic nucleus (AGN) contribution. High accuracy derived was accomplished result (1) photometry up to 30 bands high-significance detections, (2) new set SED templates, including 18 hybrids covering...