A5056881476- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Adaptive optics and wavefront sensing
- Scientific Computing and Data Management
- CCD and CMOS Imaging Sensors
- Astrophysics and Cosmic Phenomena
- Scientific Research and Discoveries
- Research Data Management Practices
- History and Developments in Astronomy
- Distributed and Parallel Computing Systems
- Calibration and Measurement Techniques
- Radio Astronomy Observations and Technology
- Spectroscopy and Laser Applications
- Advanced Vision and Imaging
- Particle Detector Development and Performance
- Big Data and Business Intelligence
- Geophysics and Gravity Measurements
- Advanced Image Processing Techniques
- Conferences and Exhibitions Management
- scientometrics and bibliometrics research
Max Planck Institute for Astronomy
2022-2024
Space Telescope Science Institute
2016-2023
Michigan Science Center
2021
Yale University
2012-2020
Whitney Museum of American Art
2014-2017
University College London
2017
University of California, Santa Cruz
2014
Carnegie Observatories
2009-2013
University of Wyoming
2010
Carnegie Institution for Science
2010
Spectroscopic+photometric redshifts, stellar mass estimates, and rest-frame colors from the 3D-HST survey are combined with structural parameter measurements CANDELS imaging to determine galaxy size–mass distribution over redshift range 0 < z 3. Separating early- late-type galaxies on basis of star-formation activity, we confirm that early-type average smaller than at all find a significantly different rate size evolution fixed mass, fast for population, Reff∝(1 + z)−1.48, moderate z)−0.75....
The 3D-HST and CANDELS programs have provided WFC3 ACS spectroscopy photometry over ~900 square arcminutes in five fields: AEGIS, COSMOS, GOODS-North, GOODS-South, the UKIDSS UDS field. All these fields a wealth of publicly available imaging datasets addition to HST data, which makes it possible construct spectral energy distributions (SEDs) objects wide wavelength range. In this paper we describe photometric analysis ancillary data at wavelengths 0.3um 8um. Objects were selected near-IR...
We constrain the slope of star formation rate (SFR; log Ψ) to stellar mass (log M⋆) relation down (M⋆/M☉) = 8.4 9.2) at z 0.5 (z 2.5) with a mass-complete sample 39,106 star-forming galaxies selected from 3D-HST photometric catalogs, using deep photometry in CANDELS fields. For first time, we find that is dependent on mass, such it steeper low masses Ψ∝log than high Ψ∝(0.3–0.6)log M⋆). These low-mass slopes are found for three different indicators: combination ultraviolet (UV) and infrared...
We present the KMOS^3D survey, a new integral field survey of over 600 galaxies at 0.7<z<2.7 using KMOS Very Large Telescope (VLT). The utilizes synergies with multi-wavelength ground and space-based surveys to trace evolution spatially-resolved kinematics star formation from homogeneous sample 5 Gyrs cosmic history. Targets, drawn mass-selected parent 3D-HST cover formation-stellar mass ($M_*$) rest-frame $(U-V)-M_*$ planes uniformly. describe selection targets, observations, data...
We present 3D-HST, a near-infrared spectroscopic Treasury program with the Hubble Space Telescope for studying processes that shape galaxies in distant Universe. 3D-HST provides rest-frame optical spectra sample of ~7000 at 1<z<3.5, epoch when 60% all star formation took place, number density quasars peaked, first stopped forming stars, and structural regularity we see today must have emerged. will cover 3/4 (625 sq.arcmin) CANDELS survey area two orbits primary WFC3/G141 grism coverage to...
In this paper we present the MOSFIRE Deep Evolution Field (MOSDEF) survey. The MOSDEF survey aims to obtain moderate-resolution (R=3000-3650) rest-frame optical spectra (~3700-7000 Angstrom) for ~1500 galaxies at 1.37<z<3.80 in three well-studied CANDELS fields: AEGIS, COSMOS, and GOODS-N. Targets are selected redshift intervals: 1.37<z<1.70, 2.09<z<2.61, 2.95<z<3.80, down fixed H_AB (F160W) magnitudes of 24.0, 24.5 25.0, respectively, using photometric spectroscopic catalogs from 3D-HST We...
We present reduced data and products from the 3D-HST survey, a 248-orbit HST Treasury program. The survey obtained WFC3 G141 grism spectroscopy in four of five CANDELS fields: AEGIS, COSMOS, GOODS-S, UDS, along with H140 imaging, parallel ACS G800L spectroscopy, I814 imaging. In previous paper, we presented photometric catalogs these fields GOODS-N, fifth field. Here describe spectroscopic data, again augmented GO-1600 GOODS-N (PI: B. Weiner). developed software to automatically optimally...
In this paper we study a key phase in the formation of massive galaxies: transition star forming galaxies into (M_stars~10^11 Msun), compact (r_e~1 kpc) quiescent galaxies, which takes place from z~3 to z~1.5. We use HST grism redshifts and extensive photometry all five 3D-HST/CANDELS fields, more than doubling area used previously for such studies, combine these data with Keck MOSFIRE NIRSPEC spectroscopy. first confirm that population massive, compact, exists at z~2, using K-band...
Exploiting the deep high-resolution imaging of all five CANDELS fields, and accurate redshift information provided by 3D-HST, we investigate relation between structure stellar populations for a mass-selected sample 6764 galaxies above 1010 M☉, spanning range 0.5 < z 2.5. For first time, fit two-dimensional models comprising single Sérsic two-component (i.e., bulge + disk) decompositions not only to H-band light distributions, but also mass maps reconstructed from resolved population...
We present a spectroscopic redshift measurement of very bright Lyman break galaxy at using the Keck/Multi-Object Spectrometer for Infra-Red Exploration. The source was pre-selected photometrically in EGS field as robust z ∼ 8 candidate with H = 25.0 mag based on optical non-detections and red Spitzer/IRAC [3.6]–[4.5] broad-band color driven by high equivalent width [O iii]+Hβ line emission. Lyα is reliably detected shows an asymmetric profile expected embedded relatively neutral...
In this paper we follow up on our previous detection of nuclear ionized outflows in the most massive (log(M*/Msun) >= 10.9) z~1-3 star-forming galaxies (Forster Schreiber et al.), by increasing sample size a factor six (to 44 above log(M*/Msun) from combination SINS/zC-SINF, LUCI, GNIRS, and KMOS^3D spectroscopic surveys. We find fairly sharp onset incidence broad emission (FWHM Ha, [NII], [SII] lines ~ 450-5300 km/s), with large [NII]/Ha ratios, 10.9, about two thirds mass range exhibiting...
Galaxy observations are influenced by many physical parameters: stellar masses, star formation rates (SFRs), histories (SFHs), metallicities, dust, black hole activity, and more. As a result, inferring accurate parameters requires high-dimensional models which capture or marginalize over this complexity. Here we re-assess inferences of galaxy masses SFRs using the 14-parameter model Prospector-$\alpha$ built in Prospector Bayesian inference framework. We fit photometry 58,461 galaxies from...
We present the discovery of four surprisingly bright (H160 ∼ 26–27 mag AB) galaxy candidates at z 9–10 in complete HST CANDELS WFC3/IR GOODS-N imaging data, doubling number 10 that are known, just ∼500 Myr after big bang. Two similarly sources also detected a reanalysis GOODS-S data set. Three galaxies significantly 4.5σ–6.2σ very deep Spitzer/IRAC 4.5 μm as is one candidates. Furthermore, brightest our (at = 10.2 ± 0.4) robustly 3.6 (6.9σ), revealing flat UV spectral energy distribution...
ABSTRACT We present Hubble WFC3/IR slitless grism spectra of a remarkably bright z ≳ 10 galaxy candidate, GN-z11, identified initially from CANDELS/GOODS-N imaging data. A significant spectroscopic continuum break is detected at <?CDATA $\lambda =1.47\pm 0.01\;\mu {\rm{m}}$?> <?MML <mml:math> <mml:mi>λ</mml:mi> <mml:mo>=</mml:mo> <mml:mn>1.47</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.01</mml:mn> <mml:mspace width="0.25em"/> <mml:mi>&mgr;</mml:mi> <mml:mi...
We present COSMOS-Drift And SHift (DASH), a Hubble Space Telescope WFC3 imaging survey of the COSMOS field in H_160 filter. The comprises 456 individual pointings corresponding to an area 0.49 deg^2 (0.66 when including archival data) and reaches 5 point-source limit =25.1 (0".3 aperture). COSMOS-DASH is widest HST/WFC3 filter, tripling extragalactic near-infrared at HST resolution. make reduced mosaic available community. use this dataset measure sizes 162 galaxies with log(M_star/M_sun) >...
We present a census of ionized gas outflows in 599 normal galaxies at redshift 0.6<z<2.7, mostly based on integral field spectroscopy Ha, [NII], and [SII] line emission. The sample fairly homogeneously covers the main sequence star-forming with masses 9.0<log(M*/Msun)<11.7, probes into regimes quiescent starburst outliers. About 1/3 exhibits high-velocity component indicative outflows, roughly equally split winds driven by star formation (SF) active galactic nuclei (AGN). incidence SF-driven...
We report the discovery of a galaxy cluster at z=1.62 located in Spitzer Wide-Area Infrared Extragalactic survey XMM-LSS field. This structure was selected solely as an overdensity galaxies with red Spitzer/IRAC colors, satisfying [3.6]-[4.5] > -0.1 AB mag. Photometric redshifts derived from Subaru XMM Deep Survey (BViz-bands), UKIRT Survey-Ultra-Deep (UKIDSS-UDS, JK-bands), and Public UDS (3.6-8.0 micron) show that this corresponds to surface density z ~ 1.6 is more than 20 sigma above mean...
We measure the rest-frame colors (dust-corrected), infrared luminosities, star formation rates, and stellar masses of 92 galaxies in a Spitzer-selected cluster at z=1.62. By fitting spectral energy distributions (SEDs) to 10-band photometry (0.4 micron < lambda(obs) <8 micron) measuring 24 fluxes for 12 spectroscopically confirmed 80 photometrically selected members, we discover an exceptionally high level core ~1700 Msun/yr per Mpc^2. The define strong blue sequence (U-V) color span range...
We analyze the resolved stellar populations of 473 massive star-forming galaxies at 0.7 < z 1.5, with multi-wavelength broad-band imaging from CANDELS and Halpha surface brightness profiles same kiloparsec resolution 3D-HST. Together, this unique data set sheds light on how assembled mass is distributed within galaxies, where new stars are being formed. find morphologies to resemble more closely those observed in ACS I band than WFC3 H band, especially for larger systems. next derive a novel...
Galaxies with the mass of Milky Way dominate stellar density Universe but it is uncertain how and when they were assembled. Here we study progenitors these galaxies out to z=2.5, using data from 3D-HST CANDELS Treasury surveys. We find that present-day masses log(M)~10.7 built ~90% their since most star formation occurring before z=1. In marked contrast assembly history massive elliptical galaxies, growth not limited large radii: in central 2 kpc increased by a factor 3.2+-0.8 between z=2.5...
The nature of dust in distant galaxies is not well understood, and until recently few direct measurements have been possible. We investigate star-forming using near-infrared grism spectra the 3D-HST survey combined with archival multi-wavelength photometry. These data allow us to make a comparison between around regions (AV, H ii) integrated content star). select sample 163 1.36 ⩽ z 1.5 Hα signal-to-noise ratio ⩾5 measure Balmer decrements from stacked calculate AV, ii. First, we stack bins...
We determine the intrinsic, 3-dimensional shape distribution of star-forming galaxies at 0<z<2.5, as inferred from their observed projected axis ratios. In present-day universe all masses 1e9 - 1e11 Msol are predominantly thin, nearly oblate disks, in line with previous studies. now extend this to higher redshifts, and find that among massive (M* > 1e10 Msol) disks most common geometric z < 2. Lower-mass z>1 possess a broad range shapes: fraction elongated (prolate) increases toward...
We present the $0.6
We present Ha maps at 1kpc spatial resolution for star-forming galaxies z~1, made possible by the WFC3 grism on HST. Employing this capability over all five 3D-HST/CANDELS fields provides a sample of 2676 galaxies. By creating deep stacked Halpha (Ha) images, we reach surface brightness limits 1x10^-18\erg\s\cm^2\arcsec^2, allowing us to map distribution ionized gas out >10kpc typical L* epoch. find that extent increases with stellar mass as r(Ha)[kpc]=1.5(Mstars/10^10Msun)^0.23....