594 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Center for Astrophysics Harvard & SmithsonianUS25 papers
- California Institute of TechnologyUS16 papers
- University of California, BerkeleyUS16 papers
- Massachusetts Institute of TechnologyUS13 papers
- University of ArizonaUS12 papers
- University of California, Santa BarbaraUS12 papers
- University of Hawaii SystemUS8 papers
- Hewlett-Packard (United States)US7 papers
- University of California, Santa CruzUS7 papers
- Durham UniversityGB6 papers
- Planetary Science InstituteUS6 papers
- Space Telescope Science InstituteUS6 papers
55 papers · 1 filter
T-Lyr1-17236: A Long-Period Low-Mass Eclipsing Binary
Jonathan Devor, David Charbonneau, Guillermo Torres +8
We describe the discovery of a 0.68+0.52 solar mass eclipsing binary (EB) with an 8.4-day orbital period, found through a systematic search of ten fields of the Trans-atlantic Exop…
Keck Laser Guide Star Adaptive Optics Monitoring of 2MASS J1534-2952AB: First Dynamical Mass Determination of a Binary T Dwarf
Michael C. Liu, Trent J. Dupuy, Michael J. Ireland
(Abridged) We present multi-epoch imaging of the T5.0+T5.5 binary 2MASS J1534-2952AB obtained with the Keck laser guide star adaptive optics system. Combined with an extensive (re-…
A Precise Estimate of the Radius of HD 149026b
Philip Nutzman, David Charbonneau, Joshua N. Winn +4
We present Spitzer 8 micron transit observations of the extrasolar planet system HD 149026. At this wavelength, transit light curves are weakly affected by stellar limb-darkening,…
Stellar proper motion and the timing of planetary transits
Roman R. Rafikov
Duration and period of transits in extrasolar planetary systems can exhibit long-term variations for a variety of reasons. Here we investigate how systemic proper motion, which ste…
Submillimeter Observations of the Young Low-Mass Object IRAS 04158+2805
Sean M. Andrews, Michael C. Liu, Jonathan P. Williams +1
We present high spatial resolution Submillimeter Array observations and supplementary single-dish photometry of the molecular gas and dust around IRAS 04158+2805, a young source wi…
BD-22 5866: A Low-mass Quadruple-lined Spectroscopic AND Eclipsing Binary
Evgenya Shkolnik, Michael C. Liu, I. Neill Reid +4
We report our discovery of an extremely rare, low mass, quadruple-lined spectroscopic binary BD-22 5866 (=NLTT 53279, integrated spectral type = M0 V), found during an ongoing sear…
GRB 071003: Broadband Follow-up Observations of a Very Bright Gamma-Ray Burst in a Galactic Halo
D. A. Perley, W. Li, R. Chornock +26
The optical afterglow of long-duration GRB 071003 is among the brightest yet to be detected from any GRB, with R ~ 12 mag in KAIT observations starting 42 s after the GRB trigger,…
A Spectroscopic Binary at the M/L Transition
Cullen H. Blake, David Charbonneau, Russel J. White +3
We report the discovery of a single-lined spectroscopic binary with an Ultra Cool Dwarf (UCD) primary with a spectral type between M8 and L0.5. This system was discovered during th…
Subtle Signatures of Multiplicity in Late-type Dwarf Spectra: The Unresolved M8.5 + T5 Binary 2MASS J03202839-0446358
Adam J. Burgasser, Michael C. Liu, Michael J. Ireland +2
Evidence is presented that 2MASS J03202839-0446358, a late-type dwarf with discrepant optical (M8:) and near-infrared (L1) spectral types, is an as-yet unresolved stellar/brown dwa…
The Origin and Kinematics of Cold Gas in Galactic Winds: Insight from Numerical Simulations
Akimi Fujita, Crystal L. Martin, Mordecai-Mark Mac Low +2
We study the origin of Na I absorbing gas in ultraluminous infrared galaxies motivated by the recent observations by Martin of extremely superthermal linewidths in this cool gas. W…
Late-time observations of SN2006gy: Still Going Strong
Nathan Smith, Ryan J. Foley, Joshua S. Bloom +9
Owing to its extremely high luminosity and long duration, SN2006gy radiated more energy in visual light than any other known SN. Two hypotheses to explain its high luminosity -- th…
The Broadband Infrared Emission Spectrum of the Exoplanet HD 189733b
David Charbonneau, Heather A. Knutson, Travis Barman +5
We present Spitzer Space Telescope time series photometry of the exoplanet system HD 189733 spanning two times of secondary eclipse, when the planet passes out of view behind the p…
The Sloan Lens ACS Survey. VI: Discovery and analysis of a double Einstein ring
Raphael Gavazzi, Tommaso Treu, Leon V. E. Koopmans +4
We report the discovery of two concentric Einstein rings around the gravitational lens SDSSJ0946+1006, as part of the Sloan Lens ACS Survey. The main lens is at redshift zl=0.222,…
Metallicities and Physical Conditions in Star-forming Galaxies at z~1.0-1.5
Xin Liu, Alice E. Shapley, Alison L. Coil +2
We present a study of the mass-metallicity (M-Z) relation and H II region physical conditions in a sample of 20 star-forming galaxies at 1.0<z<1.5 drawn from the DEEP2 Galaxy Redsh…
Parameters and Predictions for the Long-Period Transiting Planet HD 17156b
Jonathan Irwin, David Charbonneau, Philip Nutzman +8
We report high-cadence time-series photometry of the recently-discovered transiting exoplanet system HD 17156, spanning the time of transit on UT 2007 October 1, from three separat…
The Evolutionary History of Galactic Bulges: Photometric and Spectroscopic Studies of Distant Spheroids in the GOODS Fields
Lauren A. MacArthur, Richard S. Ellis, Tommaso Treu +3
We report on the first results of a new study aimed at understanding the diversity and evolutionary history of distant galactic bulges in the context of now well-established trends…
Type Ia Supernovae are Good Standard Candles in the Near Infrared: Evidence from PAIRITEL
W. Michael Wood-Vasey, Andrew S. Friedman, Joshua S. Bloom +11
We have obtained 1087 NIR (JHKs) measurements of 21 SNe Ia using PAIRITEL, nearly doubling the number of well-sampled NIR SN Ia light curves. These data strengthen the evidence tha…
The Varied Fates of z~2 Star-forming Galaxies
Charlie Conroy, Alice E. Shapley, Jeremy L. Tinker +2
Star-forming galaxies constitute the majority of galaxies with stellar masses >10^10 M_Sun/h^2 at z~2 and dominate the star-formation rate density of the Universe at this early epo…
Separating baryons and dark matter in cluster cores: a full 2-D lensing and dynamic analysis of Abell 383 and MS2137-23
D. J. Sand, T. Treu, R. S. Ellis +2
(abridged) We utilize existing imaging and spectroscopic data for the galaxy clusters MS2137-23 and Abell 383 to present improved measures of the distribution of dark and baryonic…
Super-resolving distant galaxies with gravitational telescopes: Keck-LGSAO and Hubble imaging of the lens system SDSSJ0737+3216
P. J. Marshall, T. Treu, J. Melbourne +13
We combine high-resolution images in four optical/infra-red bands, obtained with the laser guide star adaptive optics system on the Keck Telescope and with the Hubble Space Telesco…
TrES-4: A Transiting Hot Jupiter of Very Low Density
Georgi Mandushev, Francis T. O'Donovan, David Charbonneau +12
We report the discovery of TrES-4, a hot Jupiter that transits the star GSC 02620-00648 every 3.55 days. From high-resolution spectroscopy of the star we estimate a stellar effecti…
A Wide-field Survey of Two Z~0.5 Galaxy Clusters: Identifying the Physical Processes Responsible for the Observed Transformation of Spirals into S0s
Sean M. Moran, Richard S. Ellis, Tommaso Treu +3
We present new results from our comprehensive comparative survey of two massive, intermediate redshift galaxy clusters, Cl0024+17 (z=0.39) and MS0451-03 (z=0.54). We identify and s…
Super Star Cluster NGC1705-1: A Local Analogue to the Birthsite of Long-duration Gamma-ray Bursts
Hsiao-Wen Chen, J. X. Prochaska, Joshua S. Bloom
Recent observations suggest that global properties of the host galaxies for long-duration gamma-ray bursts (GRBs) are particularly well-suited for creating the massive star progeni…
The Compact X-ray Source 1E 1547.0-5408 and the Radio Shell G327.24-0.13: A New Proposed Association between a Candidate Magnetar and a Candidate Supernova Remnant
Joseph D. Gelfand, B. M. Gaensler
We present X-ray, infrared and radio observations of the field centered on X-ray source 1E 1547.0-5408 in the Galactic Plane. A new Chandra observation of this source shows it is u…