Kepler observations of transiting hot compact objects

Jason F. Rowe, William J. Borucki, David Koch, Steve B. Howell, Gibor Basri, Natalie Batalha, Timothy M. Brown, Douglas Caldwell, William D. Cochran, Edward Dunham, Andrea K. Dupree, Jonathan J. Fortney, Thomas N. Gautier, Ronald L. Gilliland, Jon Jenkins, David W. Latham, Jack J. Lissauer, Geoff Marcy, David G. Monet, Dimitar SasselovWilliam F. Welsh

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


Kepler photometry has revealed two unusual transiting companions: one orbiting an early A-star and the other orbiting 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 R and a 10,000 K late B-star KOI-81 (KIC 8823868) that has a companion in a 24 day orbit with a radius of 0.2 R. We infer a temperature of 12,250 K for KOI-74b and 13,500 K for KOI-81b. We present 43 days of high duty cycle, 30 minute cadence photometry, with models demonstrating the intriguing properties of these objects, and speculate on their nature.

Original languageEnglish (US)
Pages (from-to)L150-L154
JournalAstrophysical Journal Letters
Issue number2 PART 2
StatePublished - 2010

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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