C. M. Urry
A5070191530- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Astronomical Observations and Instrumentation
- Particle Accelerators and Free-Electron Lasers
- Stellar, planetary, and galactic studies
- Solar and Space Plasma Dynamics
- Dark Matter and Cosmic Phenomena
- Particle accelerators and beam dynamics
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Adaptive optics and wavefront sensing
- Pulsars and Gravitational Waves Research
- Geophysics and Gravity Measurements
- Astrophysics and Star Formation Studies
- Particle physics theoretical and experimental studies
- Calibration and Measurement Techniques
- History and Developments in Astronomy
- Relativity and Gravitational Theory
- Computational Physics and Python Applications
- Neutrino Physics Research
- Superconducting Materials and Applications
Yale University
2015-2024
Goddard Space Flight Center
1982-2023
Istituto di Radioastronomia di Bologna
2023
Smithsonian Astrophysical Observatory
2019
Yale Cancer Center
2006-2019
Pennsylvania State University
2019
Princeton University
2019
Max Planck Society
2016-2019
Max Planck Institute for Astronomy
2009-2019
European Southern Observatory
2019
The appearance of active galactic nuclei (AGN) depends so strongly on orientation that our current classification schemes are dominated by random pointing directions instead more interesting physical properties. Light from the centers many AGN is obscrued optically thick circumstellar matter, particularly at optical and ultraviolet wavelengths. In radio-loud AGN, bipolar jets emanating nucleus emit radio through gamma-ray light relativistically beamed along jet axes. Understanding origin...
The Nuclear Spectroscopic Telescope Array (NuSTAR) mission, launched on 2012 June 13, is the first focusing high-energy X-ray telescope in orbit. NuSTAR operates band from 3 to 79 keV, extending sensitivity of far beyond ∼10 keV cutoff achieved by all previous satellites. inherently low background associated with concentrating light enables probe hard sky a more than 100-fold improvement over collimated or coded mask instruments that have operated this bandpass. Using its unprecedented...
This special issue of the Astrophysical Journal Letters is dedicated to presenting initial results from Great Observatories Origins Deep Survey (GOODS) that are primarily, but not exclusively, based on multiband imaging data obtained with Hubble Space Telescope and Advanced Camera for Surveys (ACS). The survey covers roughly 320 arcmin2 in ACS F435W, F606W, F814W, F850LP bands, divided into two well-studied fields. Existing deep observations Chandra X-Ray Observatory ground-based facilities...
▪ Abstract A large collective effort to study the variability of active galactic nuclei (AGN) over past decade has led a number fundamental results on radio-quiet AGN and blazars. In AGN, ultraviolet (UV) bump in low-luminosity objects is thermal emission from dense medium, very probably an accretion disk, irradiated by variable X-ray source. The validity this model for high-luminosity unclear because relevant UV observations are lacking. broad-line gas kinematics appears be dominated...
Black hole mass, along with mass accretion rate, is a fundamental property of active galactic nuclei (AGNs). sets an approximate upper limit to AGN energetics via the Eddington limit. We collect and compare all black estimates from literature; these 177 masses are mostly based on virial assumption for broad emission lines, broad-line region size determined either reverberation mapping or optical luminosity. introduce 200 additional properties host galaxy bulges, using observed stellar...
We use SDSS+\textit{GALEX}+Galaxy Zoo data to study the quenching of star formation in low-redshift galaxies. show that green valley between blue cloud star-forming galaxies and red sequence quiescent colour-mass diagram is not a single transitional state through which most evolve into Rather, an analysis takes morphology account makes clear only small population early-type move rapidly across after morphologies are transformed from disk spheroid quenched rapidly. In contrast, majority have...
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...
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...
view Abstract Citations (519) References (77) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Complete Sample of 1 Jansky BL Lacertae Objects. I. Summary Properties Stickel, M. ; Padovani, P. Urry, C. Fried, J. W. Kuehr, H. This paper describes the first homogeneous, flux-limited sample radio-selected Lac objects, taken from Jy survey Kuhr et al. These 34 objects comprise only well-defined outside X-ray band. selection criteria include flat radio spectra,...
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...
We investigate a class of rapidly growing emission line galaxies, known as ‘Green Peas’, first noted by volunteers in the Galaxy Zoo project because their peculiar bright green colour and small size, unresolved Sloan Digital Sky Survey imaging. Their appearance is due to very strong optical lines, namely [O iii]λ5007 Å, with an unusually large equivalent width up ∼1000 Å. discuss well-defined sample 251 colour-selected objects, most which are strongly star forming, although there some active...
SDSS J015957.64+003310.5 is an X-ray selected, $z=0.31$ AGN from the Stripe 82X survey that transitioned a Type 1 quasar to 1.9 between 2000 and 2010. This most distant AGN, first quasar, yet observed have undergone such dramatic change. We re-observed source with double spectrograph on Palomar 5m telescope in July 2014 found spectrum unchanged since From fitting optical spectra, we find flux dropped by factor of 6 2010 while broad H$\alpha$ emission faded broadened. Serendipitous...
We describe the results of an extremely deep, 0.28 deg2 survey for z = 3.1 Lyα emission-line galaxies in Extended Chandra Deep Field-South. By using a narrowband 5000 Å filter and complementary broadband photometry from MUSYC survey, we identify statistically complete sample 162 with monochromatic fluxes brighter than 1.5 × 10-17 ergs cm-2 s-1 observer's frame equivalent widths greater 80 Å. show that width distribution these objects follows exponential rest-frame scale length w0 76 In...
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...
Using multiwavelength surveys of active galactic nuclei across a wide range bolometric luminosities (10^{43}
We present the first set of XMM-Newton EPIC observations in 2 square degree COSMOS field. The strength project is unprecedented combination a large solid angle and sensitivity over whole multiwavelength spectrum. are very efficient localizing identifying active galactic nuclei (AGN) clusters as well groups galaxies. One primary goals Cosmos survey to study co-evolution function their environment Cosmic web. Here we log observations, images summary research highlights for pass 25 pointings...
We constrain the number density and evolution of Compton-thick Active Galactic Nuclei (AGN). In local Universe we use wide area surveys from Swift INTEGRAL satellites, while for high redshifts explore candidate selections based on a combination X-ray mid-IR parameters. find significantly lower space AGN in than expected published population synthesis models to explain background. This can be explained by numerous degeneracies parameters those models; high-energy described here remove...
We present multiwavelength data for twelve blazars observed from 2008-2010 as part of an ongoing optical-infrared photometric monitoring project. Sources were selected to be bright, southern (dec < 20 deg) by the Fermi Gamma-Ray Space Telescope, with daily and weekly gamma-ray fluxes made available start mission. Light curves are presented in BVRJK at near-daily cadence. find that optical infrared well correlated all sources. Gamma-ray bright flat spectrum radio quasars (FSRQs) our sample...
The Chandra COSMOS Survey (C-COSMOS) is a large, 1.8 Ms, program that has imaged the central 0.9 deg2 of field down to limiting depths 1.9 × 10−16 erg cm−2 s−1 in soft (0.5–2 keV) band, 7.3 hard (2–10 and 5.7 full (0.5–10 band. In this paper we report i, K, 3.6 μm identifications 1761 X-ray point sources. We use likelihood ratio technique derive association optical/infrared counterparts for 97% For most remaining 3%, presence multiple or faintness possible counterpart prevented unique...
ABSTRACT We present the catalog of optical and infrared counterparts Chandra COSMOS-Legacy Survey, a 4.6 Ms program on 2.2 deg 2 COSMOS field, combination 56 new overlapping observations obtained in Cycle 14 with previous C-COSMOS survey. In this Paper we report i , K 3.6 μ m identifications 2273 X-ray point sources detected observations. use likelihood ratio technique to derive association optical/infrared (IR) for 97% sources. also update information 1743 C-COSMOS, using not available when...
Abstract We present the survey design, implementation, and outlook for COSMOS-Web, a 255 hr treasury program conducted by James Webb Space Telescope in its first cycle of observations. COSMOS-Web is contiguous 0.54 deg 2 NIRCam imaging four filters (F115W, F150W, F277W, F444W) that will reach 5 σ point-source depths ranging ∼27.5–28.2 mag. In parallel, we obtain 0.19 MIRI one filter (F770W) reaching ∼25.3–26.0 build on rich heritage multiwavelength observations data products available COSMOS...
Context. In November 2019, eROSITA on board of the Spektrum-Roentgen-Gamma (SRG) observatory started to map entire sky in X-rays. After four-year survey program, it will reach a flux limit that is about 25 times deeper than ROSAT. During SRG performance verification phase, observed contiguous 140 deg 2 area down final depth all-sky (eROSITA Final Equatorial-Depth Survey; eFEDS), with goal obtaining census X-ray emitting populations (stars, compact objects, galaxies, clusters and active...
Abstract We present a search for extremely red, dust-obscured, z > 7 galaxies with JWST/NIRCam+MIRI imaging over the first 20 arcmin 2 of publicly available Cycle 1 data from COSMOS-Web, CEERS, and PRIMER surveys. Based on their red color in F277W−F444W (∼2.5 mag) detection MIRI/F770W (∼25 mag), we identify two galaxies, COS-z8M1 CEERS-z7M1, that have best-fit photometric redshifts <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>z</mml:mi>...
Abstract We study of the role galaxy–galaxy interactions and disk instabilities in producing starburst activity galaxies out to z = 4. For this, we use a sample 387 with robust total star formation rate measurements from Herschel, gas masses Atacama Large Millimeter/submillimeter Array, stellar redshifts multiband photometry, JWST/NIRCam rest-frame optical imaging. Using mass-controlled samples, find an increased fraction interacting regime at all This increase correlates efficiency (SFE)...