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Orbital Dynamics Of A Possible Second Planet In HD 17156
Donald Short, William F. Welsh, Jerome A. Orosz +1
In this letter we report the possible existence of a second planet in the transiting extrasolar planet system HD 17156 and its interactive dynamics with the previously known planet…
The Intermediate Polar EI UMa: A Pre-Polar Cataclysmic Variable
Tamara W. Reimer, William F. Welsh, Koji Mukai +1
We present optical and X-ray time-series photometry of EI UMa that reveal modulation at 746 and 770 s, which we interpret as the white dwarf spin and spin-orbit sidebands. These de…
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…