Search Publications
The Relation between Black Hole Mass and Host Spheroid Stellar Mass Out to z ~ 2
Treu, Tommaso; Auger, Matthew W.; Malkan, Matthew A. +2 more
We combine Hubble Space Telescope images from the Great Observatories Origins Deep Survey with archival Very Large Telescope and Keck spectra of a sample of 11 X-ray-selected broad-line active galactic nuclei in the redshift range 1 < z < 2 to study the black-hole-mass-stellar-mass relation out to a look-back time of 10 Gyr. Stellar masses o…
The Brightest of Reionizing Galaxies Survey: Design and Preliminary Results
Shull, J. M.; Treu, T.; Trenti, M. +7 more
We present the first results on the search for very bright (M AB ≈ -21) galaxies at redshift z ~ 8 from the Brightest of Reionizing Galaxies (BoRG) survey. BoRG is a Hubble Space Telescope Wide Field Camera 3 (WFC3) pure-parallel survey that is obtaining images on random lines of sight at high Galactic latitudes in four filters (F606W, …
Three Millisecond Pulsars in Fermi LAT Unassociated Bright Sources
Abdo, A. A.; Camilo, F.; Çelik, Ö. +33 more
We searched for radio pulsars in 25 of the non-variable, unassociated sources in the Fermi LAT Bright Source List with the Green Bank Telescope at 820 MHz. We report the discovery of three radio and γ-ray millisecond pulsars (MSPs) from a high Galactic latitude subset of these sources. All of the pulsars are in binary systems, which would have mad…
Extreme Emission-line Galaxies in CANDELS: Broadband-selected, Starbursting Dwarf Galaxies at z > 1
Wuyts, S.; Jahnke, K.; Dickinson, M. +29 more
We identify an abundant population of extreme emission-line galaxies (EELGs) at redshift z ~ 1.7 in the Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey imaging from Hubble Space Telescope/Wide Field Camera 3 (HST/WFC3). Sixty-nine EELG candidates are selected by the large contribution of exceptionally bright emission lines to their near-i…
z ~ 4 Hα Emitters in the Great Observatories Origins Deep Survey: Tracing the Dominant Mode for Growth of Galaxies
Dickinson, Mark; Yan, Chi-Hung; Chary, Ranga-Ram +4 more
We present evidence for strong Hα emission in galaxies with spectroscopic redshifts in the range of 3.8 < z < 5.0 over the Great Observatories Origins Deep Survey fields. Among 74 galaxies detected in the Spitzer IRAC 3.6 and 4.5 µm bands, more than 70% of the galaxies show clear excess at 3.6 µm compared to the expected flux den…
The Emission by Dust and Stars of Nearby Galaxies in the Herschel KINGFISH Survey
Murphy, Eric; Gordon, Karl D.; Johnson, Benjamin D. +29 more
Using new far-infrared imaging from the Herschel Space Observatory with ancillary data from ultraviolet (UV) to submillimeter wavelengths, we estimate the total emission from dust and stars of 62 nearby galaxies in the KINGFISH survey in a way that is as empirical and model independent as possible. We collect and exploit these data in order to mea…
The Diversity of Massive Star Outbursts. I. Observations of SN2009ip, UGC 2773 OT2009-1, and Their Progenitors
Foley, Ryan J.; Levesque, Emily M.; Berger, Edo +5 more
Despite both being outbursts of luminous blue variables (LBVs), SN 2009ip and UGC 2773 OT2009-1 have very different progenitors, spectra, circumstellar environments, and possibly physical mechanisms that generated the outbursts. From pre-eruption Hubble Space Telescope images, we determine that SN 2009ip and UGC 2773 OT2009-1 have initial masses o…
Black Hole Mass Estimates Based on C IV are Consistent with Those Based on the Balmer Lines
Stern, D.; Kozłowski, S.; Quirrenbach, A. +39 more
Using a sample of high-redshift lensed quasars from the CASTLES project with observed-frame ultraviolet or optical and near-infrared spectra, we have searched for possible biases between supermassive black hole (BH) mass estimates based on the C IV, Hα, and Hβ broad emission lines. Our sample is based upon that of Greene, Peng, & Ludwig, expan…
Red Nuggets at High Redshift: Structural Evolution of Quiescent Galaxies Over 10 Gyr of Cosmic History
Glazebrook, Karl; McCarthy, Patrick J.; Yan, Haojing +15 more
We present an analysis of the size growth seen in early-type galaxies over 10 Gyr of cosmic time. Our analysis is based on a homogeneous synthesis of published data from 16 spectroscopic surveys observed at similar spatial resolution, augmented by new measurements for galaxies in the Gemini Deep Deep Survey. In total, our sample contains structura…
Galaxies in X-Ray Groups. I. Robust Membership Assignment and the Impact of Group Environments on Quenching
Koekemoer, Anton M.; Coccato, Lodovico; Leauthaud, Alexie +19 more
Understanding the mechanisms that lead dense environments to host galaxies with redder colors, more spheroidal morphologies, and lower star formation rates than field populations remains an important problem. As most candidate processes ultimately depend on host halo mass, accurate characterizations of the local environment, ideally tied to halo m…