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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…
Rotational and Cyclical Variability in gamma Cassiopeiae. II. Fifteen Seasons
Gregory W. Henry, Myron A. Smith
The B0.5IVe star gam Cas is of great interest because it is the prototype of a small group of classical Be stars having hard X-ray emission of unknown origin. We discuss results fr…
The Stellar Activity - Rotation Relationship
Nicholas J. Wright, Jeremy J. Drake, Eric E. Mamajek +1
Using a new catalog of 824 solar and late-type stars with X-ray luminosities and rotation periods we have studied the relationship between rotation and stellar activity. From an un…
3.6 and 4.5 Micron Phase Curves and Evidence for Non-Equilibrium Chemistry in the Atmosphere of Extrasolar Planet HD 189733b
Heather A. Knutson, Nikole Lewis, Jonathan J. Fortney +11
We present new, full-orbit observations of the infrared phase variations of the canonical hot Jupiter HD 189733b obtained in the 3.6 and 4.5 micron bands using the Spitzer Space Te…
The HD 192263 system: planetary orbital period and stellar variability disentangled
Diana Dragomir, Stephen R. Kane, Gregory W. Henry +11
As part of the Transit Ephemeris Refinement and Monitoring Survey (TERMS), we present new radial velocities and photometry of the HD 192263 system. Our analysis of the already avai…
Non-detection of previously reported transits of HD 97658b with MOST photometry
Diana Dragomir, Jaymie M. Matthews, Andrew W. Howard +11
The radial velocity-discovered exoplanet HD 97658b was recently announced to transit, with a derived planetary radius of 2.93 \pm 0.28 R_{Earth}. As a transiting super-Earth orbiti…