A5081052936- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Adaptive optics and wavefront sensing
- Calibration and Measurement Techniques
- CCD and CMOS Imaging Sensors
- Scientific Research and Discoveries
- Remote Sensing in Agriculture
- Geophysics and Gravity Measurements
- Cosmology and Gravitation Theories
- Spacecraft and Cryogenic Technologies
- Advanced Vision and Imaging
- Superconducting and THz Device Technology
- Dark Matter and Cosmic Phenomena
- Astro and Planetary Science
- Quantum Mechanics and Non-Hermitian Physics
- History and Developments in Astronomy
- Nuclear Physics and Applications
- Pulsars and Gravitational Waves Research
California Institute of Technology
2015-2024
Infrared Processing and Analysis Center
2015-2024
University of Copenhagen
2018-2023
Helsinki Institute of Physics
2021
Technical University of Denmark
2020
Max Planck Institute for Astronomy
2008-2019
Fleet Science Center
2011-2019
Max Planck Society
2019
University College London
2019
University of Potsdam
2018
The Cosmic Evolution Survey (COSMOS) is designed to probe the correlated evolution of galaxies, star formation, active galactic nuclei (AGN) and dark matter (DM) with large-scale structure (LSS) over redshift range z $> 0.5 $ 6. survey includes multi-wavelength imaging spectroscopy from X-ray radio wavelengths covering a 2 $\sq$°area, including HST imaging. Given very high sensitivity resolution these datasets, COSMOS also provides unprecedented samples objects at greatly reduced cosmic...
Using a compilation of 25 studies from the literature, we investigate evolution star-forming galaxy (SFG) main sequence (MS) in stellar mass and star formation rate (SFR) out to z ∼ 6. After converting all observations common set calibrations, find remarkable consensus among MS (∼0.1 dex 1σ interpublication scatter). By fitting for time bins constant mass, deconvolve observed scatter about within each redshift bin. accounting between different SFR indicators, width distribution is ∼0.2...
This report describes the 2014 study by Science Definition Team (SDT) of Wide-Field Infrared Survey Telescope (WFIRST) mission. It is a space observatory that will address most compelling scientific problems in dark energy, exoplanets and general astrophysics using 2.4-m telescope with wide-field infrared instrument an optical coronagraph. The Astro2010 Decadal recommended Wide Field as its top priority for new large As conceived decadal survey, WFIRST would carry out energy science program,...
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...
Hyper Suprime-Cam (HSC) is a wide-field imaging camera on the prime focus of 8.2m Subaru telescope summit Maunakea in Hawaii. A team scientists from Japan, Taiwan and Princeton University using HSC to carry out 300-night multi-band survey high-latitude sky. The includes three layers: Wide layer will cover 1400 deg$^2$ five broad bands ($grizy$), with $5\,\sigma$ point-source depth $r \approx 26$. Deep covers total 26~deg$^2$ four fields, going roughly magnitude fainter, while UltraDeep goes...
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...
zCOSMOS is a large-redshift survey that being undertaken in the COSMOS field using 600 hr of observation with VIMOS spectrograph on 8 m VLT. The designed to characterize environments galaxies from 100 kpc scales galaxy groups up Mpc scale cosmic web and produce diagnostic information active galactic nuclei. consists two parts: (1) zCOSMOS-bright, magnitude-limited I-band IAB < 22.5 sample about 20,000 0.1 z 1.2 covering whole 1.7 deg2 ACS field, for which parameters at ~ 0.7 are be directly...
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,...
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 describe the details of Hubble Space Telescope (HST) Advanced Camera for Surveys / Wide Field Channel (ACS/WFC) observations COSMOS field, including data calibration and processing procedures. obtained a total 583 orbits HST ACS/WFC imaging in F814W filter, covering field that is 1.64 square degrees area, largest contiguous ever imaged with HST. The median exposure depth across 2028 seconds (one orbit), achieving limiting point-source AB(F814W) = 27.2 (5 sigma). also present about...
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...
The Spitzer Survey of Stellar Structure in Galaxies S^4G is an Exploration Science Legacy Program approved for the post-cryogenic mission. It a volume-, magnitude-, and size-limited (d < 40 Mpc, |b| > 30 degrees, m_(Bcorr) 15.5, D25>1') survey 2,331 galaxies using IRAC at 3.6 4.5 microns. Each galaxy observed 240 s mapped to 1.5 x D25. final mosaicked images have typical 1 sigma rms noise level 0.0072 0.0093 MJy / sr microns, respectively. Our azimuthally-averaged surface brightness profile...
The Cosmic Evolution Survey (COSMOS) was initiated with an extensive allocation (590 orbits in Cycles 12-13) using the Hubble Space Telescope (HST) for high resolution imaging. Here we review characteristics of HST imaging Advanced Camera Surveys (ACS) and parallel observations NICMOS WFPC2. A square field (1.8$\sq$\deg) has been imaged single-orbit ACS I-F814W exposures 50% completeness sources 0.5\arcsec diameter at I$_{AB} $ = 26.0 mag. is a key part COSMOS survey, providing very...
ALMA Cycle 2 observations of the long wavelength dust emission in 145 star-forming galaxies are used to probe evolution ISM. We also develop physical basis and empirical calibration (with 72 low-z z ~ galaxies) for using continuum as a quantitative interstellar medium (ISM) masses. The with highest star formation rates (SFRs) at <z> = 2.2 4.4 have gas masses up 100 times that Milky Way mass fractions reaching 50 80%, i.e. 1 - 4 their stellar find single high-z law: SFR 35 M_ mol^0.89 x...
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...
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 use highly spectroscopically complete deep and wide-area Chandra surveys to determine the cosmic evolution of hard X-ray-selected AGNs. X-ray luminosity functions (HXLFs) for all spectral types broad-line AGNs (BLAGNs) alone. At z<1.2, both are well described by pure evolution. Thus, drop in almost an order magnitude over this redshift range. show that observed is due AGN downsizing. directly compare our BLAGN HXLFs with optical QSO LFs find do not probe faint enough see downturn...
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...
With a primary goal of conducting precision weak lensing measurements from space, the COSMOS survey has imaged largest contiguous area observed by Hubble Space Telescope (HST) to date using Advanced Camera for Surveys (ACS). This is first paper in series where we describe our strategy addressing various technical challenges production data. The ACS catalog constructed 575 ACS/WFC tiles (1.64 deg^2) and contains total 1.2x10^6 objects limiting magnitude F814W=26.5. made publicly available....
We have analyzed the redshift-dependent fraction of galactic bars over 0.2