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arxiv: 1001.3420 · v3 · pith:NCDCGV5Vnew · submitted 2010-01-19 · 🌌 astro-ph.SR

Kepler Observations of Transiting Hot Compact Objects

Jason F. Rowe (NASA Postdoctoral Program Fellow , NASA Ames Research Center) , William J. Borucki (NASA Ames Research Center) , David Koch (NASA Ames Research Center) , Steve B. Howell (National Optical Astronomy Observatory) , Gibor Basri (University of California , Berkeley) , Natalie Batalha (San Jose State University)
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Timothy M. Brown (Las Cumbres Observatory Global Telescope) Douglas Caldwell (SETI Institute) William D. Cochran (University of Texas) Edward Dunham (Lowell Observatory) Andrea K. Dupree (Harvard-Smithsonian Center for Astrophysics) Jonathan J. Fortney (University of California Santa Cruz) Thomas N. Gautier III (Jet Propulsion Laboratory/California Institute of Technology) Ronald L. Gilliland (Space Telescope Science Institute) Jon Jenkins (SETI Institute) David W. Latham (Harvard-Smithsonian Center for Astrophysics) Jack .J. Lissauer (NASA Ames Research Center) Geoff Marcy (University of California David G. Monet (US Naval Observatory) Dimitar Sasselov (Harvard-Smithsonian Center for Astrophysics) William F. Welsh (San Diego State University)
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classification 🌌 astro-ph.SR
keywords companiona-starb-starearlykeplerlateoccultationorbit
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Kepler photometry has revealed two unusual transiting companions orbiting an early A-star and a late B-star. In both cases the occultation of the companion is deeper than the transit. The occultation and transit with follow-up optical spectroscopy reveal a 9400 K early A-star, KOI-74 (KIC 6889235), with a companion in a 5.2 day orbit with a radius of 0.08 Rsun and a 10000 K late B-star KOI-81 (KIC 8823868) that has a companion in a 24 day orbit with a radius of 0.2 Rsun. We infer a temperature of 12250 K for KOI-74b and 13500 K for KOI-81b. We present 43 days of high duty cycle, 30 minute cadence photometry, with models demonstrating the intriguing properties of these object, and speculate on their nature.

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