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15 papers · 2 filters
The Discovery of HD 37605c and a Dispositive Null Detection of Transits of HD 37605b
Sharon Xuesong Wang, Jason T. Wright, William Cochran +15
We report the radial-velocity discovery of a second planetary mass companion to the K0 V star HD 37605, which was already known to host an eccentric, P~55 days Jovian planet, HD 37…
The TRENDS High-Contrast Imaging Survey. I. Three Benchmark M-dwarfs Orbiting Solar-type Stars
Justin R. Crepp, John Asher Johnson, Andrew W. Howard +8
We present initial results from a new high-contrast imaging program dedicated to stars that exhibit long-term Doppler radial velocity accelerations (or "trends"). The goal of the T…
The TRENDS High-Contrast Imaging Survey. II. Direct Detection of the HD 8375 Tertiary
Justin R. Crepp, John Asher Johnson, Andrew W. Howard +6
We present the direct imaging detection of a faint tertiary companion to the single-lined spectroscopic binary HD 8375 AB. Initially noticed as an 53 m/s/yr Doppler acceleration by…
Planet Hunters: A Transiting Circumbinary Planet in a Quadruple Star System
Megan E. Schwamb, Jerome A. Orosz, Joshua A. Carter +17
We report the discovery and confirmation of a transiting circumbinary planet (PH1b) around KIC 4862625, an eclipsing binary in the Kepler field. The planet was discovered by volunt…
Precise Doppler Monitoring of Barnard's Star
Jieun Choi, Chris McCarthy, Geoffrey W. Marcy +5
We present 248 precise Doppler measurements of Barnard's Star (Gl 699), the second nearest star system to Earth, obtained from Lick and Keck Observatories during 25 years between 1…
Alignment of the stellar spin with the orbits of a three-planet system
Roberto Sanchis-Ojeda, Daniel C. Fabrycky, Josh N. Winn +16
The Sun's equator and the planets' orbital planes are nearly aligned, which is presumably a consequence of their formation from a single spinning gaseous disk. For exoplanetary sys…