Search Publications
X-UDS: The Chandra Legacy Survey of the UKIDSS Ultra Deep Survey Field
Papovich, Casey; Kocevski, Dale D.; Koekemoer, Anton M. +25 more
We present the X-UDS survey, a set of wide and deep Chandra observations of the Subaru-XMM Deep/UKIDSS Ultra Deep Survey (SXDS/UDS) field. The survey consists of 25 observations that cover a total area of 0.33 deg2. The observations are combined to provide a nominal depth of ∼600 ks in the central 100 arcmin2 region of the fi…
Far-ultraviolet Activity Levels of F, G, K, and M Dwarf Exoplanet Host Stars
Loyd, R. O. Parke; Redfield, Seth; France, Kevin +4 more
We present a survey of far-ultraviolet (FUV; 1150-1450 Å) emission line spectra from 71 planet-hosting and 33 non-planet-hosting F, G, K, and M dwarfs with the goals of characterizing their range of FUV activity levels, calibrating the FUV activity level to the 90-360 Å extreme-ultraviolet (EUV) stellar flux, and investigating the potential for FU…
HDUV: The Hubble Deep UV Legacy Survey
Oesch, P. A.; Carollo, C. M.; Nelson, E. J. +15 more
We present the Hubble Deep UV Legacy Survey (HDUV), a 132-orbit imaging program with the WFC3/UVIS camera on board the Hubble Space Telescope (HST). The HDUV extends and builds on the few previous UV imaging surveys in the two GOODS/CANDELS-Deep fields to provide deep images over a total area of ∼100 arcmin2 in the two filters F275W and…
The Herschel-PACS Legacy of Low-mass Protostars: The Properties of Warm and Hot Gas Components and Their Origin in Far-UV Illuminated Shocks
Herczeg, Gregory J.; van Dishoeck, Ewine F.; Green, Joel D. +11 more
Recent observations from Herschel allow the identification of important mechanisms responsible both for the heating of the gas that surrounds low-mass protostars and for its subsequent cooling in the far-infrared. Shocks are routinely invoked to reproduce some properties of the far-IR spectra, but standard models fail to reproduce the emission fro…
The TOP-SCOPE Survey of Planck Galactic Cold Clumps: Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17
Bernard, J. -P.; McGehee, P.; Montier, L. +153 more
The low dust temperatures (<14 K) of Planck Galactic cold clumps (PGCCs) make them ideal targets to probe the initial conditions and very early phase of star formation. “TOP-SCOPE” is a joint survey program targeting ∼2000 PGCCs in J = 1-0 transitions of CO isotopologues and ∼1000 PGCCs in 850 µm continuum emission. The objective of the “…
Spectral Properties of Cool Stars: Extended Abundance Analysis of Kepler Objects of Interest
Fischer, Debra A.; Brewer, John M.
Accurate stellar parameters and precise elemental abundances are vital pieces to correctly characterize discovered planetary systems, better understand planet formation, and trace galactic chemical evolution. We have performed a uniform spectroscopic analysis for 1127 stars, yielding accurate gravity, temperature, and projected rotational velocity…
Stellar Mass Distribution and Star Formation History of the Galactic Disk Revealed by Mono-age Stellar Populations from LAMOST
Shi, Jianrong; Wu, Yaqian; Xiang, Maosheng +9 more
We present a detailed determination and analysis of 3D stellar mass distribution of the Galactic disk for mono-age populations using a sample of 0.93 million main-sequence turnoff and subgiant stars from the LAMOST Galactic Surveys. Our results show the following. (1) All stellar populations younger than 10 Gyr exhibit strong disk flaring, which i…
hCOSMOS: A Dense Spectroscopic Survey of r ≤ 21.3 Galaxies in the COSMOS field
Hwang, Ho Seong; Geller, Margaret J.; Damjanov, Ivana +2 more
We describe the hCOSMOS redshift survey of the COSMOS field conducted with the Hectospec spectrograph on the MMT. In the central 1 deg2, the hCOS20.6 subset of the survey is > 90 % complete to a limiting magnitude r = 20.6. The hCOSMOS survey includes 1701 new redshifts in the COSMOS field. We also use the total of 4362 new and remea…
The Herschel-ATLAS Data Release 2. Paper II. Catalogs of Far-infrared and Submillimeter Sources in the Fields at the South and North Galactic Poles
Valtchanov, I.; Ivison, R. J.; de Zotti, G. +13 more
The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) is a survey of 660 deg2 with the PACS and SPIRE cameras in five photometric bands: 100, 160, 250, 350, and 500 µm. This is the second of three papers describing the data release for the large fields at the south and north Galactic poles (NGP and SGP). In this paper w…
Deep JVLA Imaging of GOODS-N at 20 cm
Owen, Frazer N.
New wideband continuum observations in the 1-2 GHz band of the GOODS-N field using NSF’s Karl G. Jansky Very Large Array (VLA) are presented. The best image with an effective frequency of 1525 MHz reaches an rms noise in the field center of 2.2 µJy, with 1.″6 resolution. A catalog of 795 sources is presented covering a radius of 9 arcminutes…