Search Publications
A Census of Star-forming Galaxies in the Z ~ 9-10 Universe based on HST+Spitzer Observations over 19 Clash Clusters: Three Candidate Z ~ 9-10 Galaxies and Improved Constraints on the Star Formation Rate Density at Z ~ 9.2
Kelson, D. D.; Infante, L.; Zheng, W. +34 more
We utilize a two-color Lyman-break selection criterion to search for z ~ 9-10 galaxies over the first 19 clusters in the CLASH program. A systematic search yields three z ~ 9-10 candidates. While we have already reported the most robust of these candidates, MACS1149-JD, two additional z ~ 9 candidates are also found and have H 160-band …
Physical Properties of Emission-line Galaxies at z ~ 2 from Near-infrared Spectroscopy with Magellan FIRE
Hathi, Nimish P.; Martin, Crystal L.; Bunker, Andrew J. +16 more
We present results from near-infrared spectroscopy of 26 emission-line galaxies at z ~ 2.2 and z ~ 1.5 obtained with the Folded-port InfraRed Echellette (FIRE) spectrometer on the 6.5 m Magellan Baade telescope. The sample was selected from the WFC3 Infrared Spectroscopic Parallels survey, which uses the near-infrared grism of the Hubble Space Tel…
The Long Lives of Giant Clumps and the Birth of Outflows in Gas-rich Galaxies at High Redshift
Amram, Philippe; Daddi, Emanuele; Juneau, Stéphanie +13 more
Star-forming disk galaxies at high redshift are often subject to violent disk instability, characterized by giant clumps whose fate is yet to be understood. The main question is whether the clumps disrupt within their dynamical timescale (<=50 Myr), like the molecular clouds in today's galaxies, or whether they survive stellar feedback for more…
Lens Models and Magnification Maps of the Six Hubble Frontier Fields Clusters
Coe, Dan; Sharon, Keren; Johnson, Traci L. +3 more
We present strong-lensing models as well as mass and magnification maps for the cores of the six Hubble Space Telescope (HST) Frontier Fields galaxy clusters. Our parametric lens models are constrained by the locations and redshifts of multiple image systems of lensed background galaxies. We use a combination of photometric redshifts and spectrosc…
The Typecasting of Active Galactic Nuclei: Mrk 590 no Longer Fits the Role
Martini, P.; Peterson, B. M.; Pogge, R. W. +9 more
We present multiwavelength observations that trace more than 40 yr in the life of the active galactic nucleus (AGN) in Mrk 590, traditionally known as a classic Seyfert 1 galaxy. From spectra recently obtained from Hubble Space Telescope, Chandra, and the Large Binocular Telescope, we find that the activity in the nucleus of Mrk 590 has diminished…
A Substantial Population of Massive Quiescent Galaxies at z ~ 4 from ZFOURGE
Papovich, Casey; Dickinson, Mark; Inami, Hanae +21 more
We report the likely identification of a substantial population of massive M ~ 1011 M ⊙ galaxies at z ~ 4 with suppressed star formation rates (SFRs), selected on rest-frame optical to near-IR colors from the FourStar Galaxy Evolution Survey (ZFOURGE). The observed spectral energy distributions show pronounced breaks, sampled…
Validation of Kepler's Multiple Planet Candidates. II. Refined Statistical Framework and Descriptions of Systems of Special Interest
Torres, Guillermo; Marcy, Geoffrey W.; Lissauer, Jack J. +11 more
We extend the statistical analysis performed by Lissauer et al. in 2012, which demonstrates that the overwhelming majority of Kepler candidate multiple transiting systems (multis) represents true transiting planets, and we develop therefrom a procedure to validate large numbers of planet candidates in multis as bona fide exoplanets. We show that t…
A Large Catalog of Accurate Distances to Molecular Clouds from PS1 Photometry
Price, P. A.; Rix, H. -W.; Chambers, K. C. +12 more
Distance measurements to molecular clouds are important but are often made separately for each cloud of interest, employing very different data and techniques. We present a large, homogeneous catalog of distances to molecular clouds, most of which are of unprecedented accuracy. We determine distances using optical photometry of stars along lines o…
Jellyfish: Evidence of Extreme Ram-pressure Stripping in Massive Galaxy Clusters
Edge, A. C.; Ebeling, H.; Stephenson, L. N.
Ram-pressure stripping by the gaseous intracluster medium has been proposed as the dominant physical mechanism driving the rapid evolution of galaxies in dense environments. Detailed studies of this process have, however, largely been limited to relatively modest examples affecting only the outermost gas layers of galaxies in nearby and/or low-mas…
The SINS/zC-SINF Survey of z ~ 2 Galaxy Kinematics: Evidence for Gravitational Quenching
Wuyts, E.; Lutz, D.; Wuyts, S. +25 more
As part of the SINS/zC-SINF surveys of high-z galaxy kinematics, we derive the radial distributions of Hα surface brightness, stellar mass surface density, and dynamical mass at ~2 kpc resolution in 19 z ~ 2 star-forming disks with deep SINFONI adaptive optics spectroscopy at the ESO Very Large Telescope. From these data we infer the radial distri…