4k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of California, Santa CruzUS948 papers
- Space Telescope Science InstituteUS207 papers
- Center for Astrophysics Harvard & SmithsonianUS153 papers
- Max Planck Institute for AstronomyDE138 papers
- University of ArizonaUS127 papers
- University of California, BerkeleyUS127 papers
- California Institute of TechnologyUS126 papers
- Carnegie ObservatoriesUS120 papers
- Carnegie Institution for ScienceUS113 papers
- Swinburne University of TechnologyAU107 papers
- European Southern ObservatoryCL103 papers
- Yale UniversityUS94 papers
43 papers · 1 filter
Probing the faint end of the quasar luminosity function at z ~ 4 in the COSMOS field
H. Ikeda, T. Nagao, K. Matsuoka +16
We searched for quasars that are ~ 3 mag fainter than the SDSS quasars in the redshift range 3.7 < z < 4.7 in the COSMOS field to constrain the faint end of the quasar luminosity f…
Direct Evidence for an Enhancement of Helium in Giant Stars in Omega Centauri
A. K. Dupree, Jay Strader, Graeme H. Smith
The double main sequence identified in the globular cluster Omega Centauri has been interpreted using isochrones to indicate a large variation in the abundance of helium. If true,…
Thermohaline Mixing and its Role in the Evolution of Carbon and Nitrogen Abundances in Globular Cluster Red Giants: The Test Case of Messier 3
George C. Angelou, Ross P. Church, Richard J. Stancliffe +2
We review the observational evidence for extra mixing in stars on the red giant branch (RGB) and discuss why thermohaline mixing is a strong candidate mechanism. We recall the simp…
The Lick-Carnegie Survey: Four New Exoplanet Candidates
Stefano Meschiari, Gregory Laughlin, Steven S. Vogt +4
We present new precise HIRES radial velocity (RV) data sets of five nearby stars obtained at Keck Observatory. HD 31253, HD 218566, HD 177830, HD 99492 and HD 74156 are host stars…
The Origin of [OII] Emission in Recently Quenched AGN Hosts
Dale D. Kocevski, Brian C. Lemaux, Lori M. Lubin +3
We have employed emission-line diagnostics derived from DEIMOS and NIRSPEC spectroscopy to determine the origin of the [OII] emission line observed in six AGN hosts at z~0.9. These…
Multi-Element Abundance Measurements from Medium-Resolution Spectra. III. Metallicity Distributions of Milky Way Dwarf Satellite Galaxies
Evan N. Kirby, Gustavo A. Lanfranchi, Joshua D. Simon +2
We present metallicity distribution functions (MDFs) for the central regions of eight dwarf satellite galaxies of the Milky Way: Fornax, Leo I and II, Sculptor, Sextans, Draco, Can…
Improving Transit Predictions of Known Exoplanets with TERMS
Stephen R. Kane, David Ciardi, Debra Fischer +7
Transiting planet discoveries have largely been restricted to the short-period or low-periastron distance regimes due to the bias inherent in the geometric transit probability. Thr…
Self-consistent evolution of gas and cosmic rays in Cygnus A and similar FR II classic double radio sources
William G. Mathews, Fulai Guo
In Cygnus A and other classical FR II double radio sources, powerful opposing jets from the cores of halo-centered galaxies drive out into the surrounding cluster gas, forming hots…
The Properties of X-ray Cold Fronts in a Statistical Sample of Simulated Galaxy Clusters
Eric J. Hallman, Samuel W. Skillman, Tesla E. Jeltema +4
We examine the incidence of cold fronts in a large sample of galaxy clusters extracted from a (512h^-1 Mpc) hydrodynamic/N-body cosmological simulation with adiabatic gas physics c…
Automated Morphological Classification of SDSS Red Sequence Galaxies
Judy Y. Cheng, S. M. Faber, Luc Simard +4
(abridged) In the last decade, the advent of enormous galaxy surveys has motivated the development of automated morphological classification schemes to deal with large data volumes…
Three-dimensional Disk-Planet Torques in a Locally Isothermal Disk
Gennaro D'Angelo, Stephen H. Lubow
We determine an expression for the Type I planet migration torque involving a locally isothermal disk, with moderate turbulent viscosity (~0.0005 < alpha < ~0.05), based on three-d…
Spitzer IRS 16 micron Observations of the GOODS Fields
Harry I. Teplitz, Ranga Chary, David Elbaz +13
We present Spitzer 16 micron imaging of the Great Observatories Origins Deep Survey (GOODS) fields. We survey 150 square arcminutes in each of the two GOODS fields (North and South…
High Dust Depletion in Two Intervening Quasar Absorption Line Systems with the 2175-Å Extinction Bump at
Peng Jiang, Jian Ge, J. Xavier Prochaska +3
We present the column densities of heavy-elements and dust depletion studies in twostrong Mg~II absorption systems at displaying the 2175-Å dust extinction feature. Colu…
Light-Element Abundance Variations at Low Metallicity: the Globular Cluster NGC 5466
Matthew Shetrone, Sarah L. Martell, Rachel Wilkerson +4
We present low-resolution (R~850) spectra for 67 asymptotic giant branch (AGB), horizontal branch and red giant branch (RGB) stars in the low-metallicity globular cluster NGC 5466,…
Constraints on Decaying Dark Matter from Fermi Observations of Nearby Galaxies and Clusters
Leanna Dugger, Tesla E. Jeltema, Stefano Profumo
We analyze the impact of Fermi gamma-ray observations (primarily non-detections) of selected nearby galaxies, including dwarf spheroidals, and of clusters of galaxies on decaying d…
Cosmic Ray-Dominated AGN Jets and the Formation of X-ray Cavities in Galaxy Clusters
Fulai Guo, William G. Mathews
It is widely accepted that feedback from active galactic nuclei (AGN) plays a key role in the evolution of gas in groups and clusters of galaxies. Unequivocal evidence comes from q…
A High-Velocity Narrow Absorption Line Outflow in the Quasar J212329.46-005052.9
F. Hamann, N. Kanekar, J. X. Prochaska +5
We report on a variable high-velocity narrow absorption line outflow in the redshift 2.3 quasar J2123-0050. Five distinct outflow systems are detected with velocity shifts from -97…
Low-ionization Line Emission from Starburst Galaxies: A New Probe of Galactic-Scale Outflows
Kate H. R. Rubin, J. Xavier Prochaska, Brice Ménard +4
We study the kinematically narrow, low-ionization line emission from a bright, starburst galaxy at z = 0.69 using slit spectroscopy obtained with Keck/LRIS. The spectrum reveals st…
Retired A Stars and Their Companions VI. A Pair of Interacting Exoplanet Pairs Around the Subgiants 24 Sextanis and HD200964
John Asher Johnson, Matthew Payne, Andrew W. Howard +10
We report radial velocity measurements of the G-type subgiants 24 Sextanis (=HD90043) and HD200964. Both are massive, evolved stars that exhibit periodic variations due to the pres…
Dissecting the Red Sequence. IV. The Role of Truncation in the Two-Dimensional Family of Early-Type Galaxy Star Formation Histories
Genevieve J. Graves, S. M. Faber, Ricardo P. Schiavon
In the three-dimensional parameter space defined by velocity dispersion, effective radius (R_e), and effective surface brightness (I_e), early-type galaxies are observed to populat…
Performance of MEMS-based visible-light adaptive optics at Lick Observatory: Closed- and open-loop control
Katie Morzinski, Luke C. Johnson, Donald T. Gavel +4
At the University of California's Lick Observatory, we have implemented an on-sky testbed for next-generation adaptive optics (AO) technologies. The Visible-Light Laser Guidestar E…
The Infrared Imaging Spectrograph (IRIS) for TMT: Instrument Overview
James E. Larkin, Anna M. Moore, Elizabeth J. Barton +16
We present an overview of the design of IRIS, an infrared (0.85 - 2.5 micron) integral field spectrograph and imaging camera for the Thirty Meter Telescope (TMT). With extremely lo…
Dark Matter decay and annihilation in the Local Universe: CLUES from Fermi
A. J. Cuesta, T. E. Jeltema, F. Zandanel +9
We present all-sky simulated Fermi maps of gamma-rays from dark matter decay and annihilation in the Local Universe. The dark matter distribution is obtained from a constrained cos…
Cosmological concordance or chemical coincidence? Deuterated molecular hydrogen abundances at high redshift
J. Tumlinson, A. L. Malec, R. F. Carswell +8
We report two detections of deuterated molecular hydrogen (HD) in QSO absorption-line systems at . Toward J2123-0500, we find (HD) for a sub-DLA with me…