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
407 papers · 1 filter
The Connection between a Lyman Limit System, a very strong OVI Absorber, and Galaxies at z~0.203
N. Lehner, J. X. Prochaska, H. A. Kobulnicky +4
With a column density log N(OVI) = 14.95+/-0.05, the OVI absorber at z_abs~0.2028 observed toward the QSO PKS0312-77 (z_em=0.223) is the strongest yet detected at z<0.5. At nearly…
Evidence of Star Formation in Local S0 Galaxies: Spitzer Observations of the SAURON Sample
Pasquale Temi, Fabrizio Brighenti, William G. Mathews +1
We discuss infrared Spitzer observations of early type galaxies in the SAURON sample at 24, 60 and 170 microns. When compared with 2MASS Ks band luminosities, lenticular (S0) galax…
HATNet Field G205: Follow-Up Observations of 28 Transiting-Planet candidates and Confirmation of the Planet HAT-P-8b
David W. Latham, Gáspár Á. Bakos, Guillermo Torres +16
We report the identification of 32 transiting-planet candidates in HATNet field G205. We describe the procedures that we have used to follow up these candidates with spectroscopic…
Characterization of the HD 17156 planetary system
M. Barbieri, R. Alonso, S. Desidera +11
AIMS : To improve the parameters of the HD 17156 system (peculiar due to the eccentric and long orbital period of its transiting planet) and constrain the presence of stellar compa…
Constraining the energy budget of GRB 080721
R. L. C. Starling, E. Rol, A. J. van der Horst +17
We follow the bright, highly energetic afterglow of Swift-discovered GRB 080721 at z=2.591 out to 36 days or 3e6 s since the trigger in the optical and X-ray bands. We do not detec…
The Ellipticities of Cluster Early-type Galaxies from z~1 to z~0: No Evolution in the Overall Distribution of Bulge-to-Disk Ratios
B. P. Holden, M. Franx, G. D. Illingworth +7
We have compiled a sample of early-type cluster galaxies from 0 < z < 1.3 and measured the evolution of their ellipticity distributions. Our sample contains 487 galaxies in 17 z>0.…
Models of Jupiter's Growth Incorporating Thermal and Hydrodynamic Constraints
Jack J. Lissauer, Olenka Hubickyj, Gennaro D'Angelo +1
[Abridged] We model the growth of Jupiter via core nucleated accretion, applying constraints from hydrodynamical processes that result from the disk-planet interaction. We compute…
Recent Structural Evolution of Early-Type Galaxies: Size Growth from z=1 to z=0
Arjen van der Wel, Bradford P. Holden, Andrew W. Zirm +4
Strong size and internal density evolution of early-type galaxies between z~2 and the present has been reported by several authors. Here we analyze samples of nearby and distant (z…
Inspiralling Supermassive Black Holes: A New Signpost for Galaxy Mergers
Julia M. Comerford, Brian F. Gerke, Jeffrey A. Newman +8
We present a new technique for observationally identifying galaxy mergers spectroscopically rather than through host galaxy imaging. Our technique exploits the dynamics of supermas…
Dust Extinction in High-z Galaxies with GRB Afterglow Spectroscopy - The 2175Å Feature at z=2.45
Á. Elíasdóttir, J. P. U. Fynbo, J. Hjorth +8
We report the clear detection of the 2175A dust absorption feature in the optical afterglow spectrum of the gamma-ray burst (GRB) GRB070802 at a redshift of z=2.45. This is the hig…
The Least Luminous Galaxy: Spectroscopy of the Milky Way Satellite Segue 1
Marla Geha, Beth Willman, Josh D. Simon +4
We present Keck/DEIMOS spectroscopy of Segue 1, an ultra-low luminosity (M_V = -1.5) Milky Way satellite companion. While the combined size and luminosity of Segue 1 are consistent…
Uncovering Extremely Metal-Poor Stars in the Milky Way's Ultra-Faint Dwarf Spheroidal Satellite Galaxies
Evan N. Kirby, Joshua D. Simon, Marla Geha +2
We present new metallicity measurements for 298 individual red giant branch stars in eight of the least luminous dwarf spheroidal galaxies (dSphs) in the Milky Way (MW) system. Our…
The X-ray cavities, filaments and cold fronts in the core of the galaxy group NGC 5044
Fabio Gastaldello, David A. Buote, Pasquale Temi +3
We present a two-dimensional analysis of the bright nearby galaxy group NGC 5044 using the currently available Chandra and XMM data. In the inner 10 kpc a pair of cavities are evid…
Baryons: What, When and Where?
Jason X. Prochaska, Jason Tumlinson
We review the current state of empirical knowledge of the total budget of baryonic matter in the Universe as observed since the epoch of reionization. Our summary examines on three…
Evolution of the First Stars with Dark Matter Burning
Sung-Chul Yoon, Fabio Iocco, Shizuka Akiyama
Recent theoretical studies have revealed the possibly important role of the capture and annihilation process of weakly interacting massive particles (WIMPs) for the first stars. Us…
AEGIS: The Nature of the Host Galaxies of Low-ionization Outflows at z < 0.6
Taro Sato, Crystal L. Martin, Kai G. Noeske +2
We report on a S/N-limited search for low-ionization gas outflows in the spectra of the 0.11 < z < 0.54 objects in the EGS portion of the DEEP2 survey. Doppler shifts from the host…
A Deep HST Study of the Globular Cluster NGC 6397: Reduction Methods
Jay Anderson, Ivan R. King, Harvey B. Richer +6
We describe here the reduction methods that we developed to study the faintest red dwarfs and white dwarfs in an outer field of NGC6397, which was observed by \hst for 126 orbits i…
The binary fraction in the globular cluster NGC 6397
D. S. Davis, H. B. Richer, J. Anderson +5
Using Hubble Space Telescope (HST) observations of the globular cluster NGC6397, we constrain the cluster's binary fraction. The observations consist of two fields: the primary sci…
Confirmation of the remarkable compactness of massive quiescent galaxies at z~2.3: early-type galaxies did not form in a simple monolithic collapse
Pieter van Dokkum, Marijn Franx, Mariska Kriek +9
Using deep near-infrared spectroscopy Kriek et al. (2006) found that ~45% of massive galaxies at z~2.3 have evolved stellar populations and little or no ongoing star formation. Her…
A New Constraint on the Escape Fraction in Distant Galaxies Using Gamma-ray Burst Afterglow Spectroscopy
Hsiao-Wen Chen, Jason X. Prochaska, Nickolay Y. Gnedin
We describe a new method to measure the escape fraction fesc of ionizing radiation from distant star-forming galaxies using the afterglow spectra of long-duration gamma-ray bursts…
HST and Spitzer imaging of red and blue galaxies at z~2.5: A correlation between size and star formation activity from compact quiescent galaxies to extended star forming galaxies
S. Toft, P. van Dokkum, M. Franx +13
We present HST NICMOS+ACS and Spitzer IRAC+MIPS observations of 41 galaxies at 2<z<3.5 in the FIRES MS1054 field with red and blue rest-frame optical colors. About half of the gala…
Selection Bias in Observing the Cosmological Evolution of the Mbh-sigma and Mbh-L Relationships
Tod R. Lauer, Scott Tremaine, Douglas Richstone +1
Programs to observe evolution in the Mbh-sigma or Mbh-L relations typically compare black-hole masses, Mbh, in high-redshift galaxies selected by nuclear activity to Mbh in local g…
Stellar Evolution in NGC 6791: Mass Loss on the Red Giant Branch and the Formation of Low Mass White Dwarfs
Jasonjot S. Kalirai, P. Bergeron, Brad M. S. Hansen +4
We present the first detailed study of the properties (temperatures, gravities, and masses) of the NGC 6791 white dwarf population. This unique stellar system is both one of the ol…
Looking for Giant Earths in the HD 209458 System: A Search for Transits in MOST Space-based Photometry
Bryce Croll, Jaymie M. Matthews, Jason F. Rowe +11
We have made a comprehensive transit search for exoplanets down to about 2 Earth radii in the HD 209458 system, based on nearly uninterrupted broadband optical photometry obtained…