Kepler Observations of Transiting Hot Compact Objects

Abstract

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 solar radius 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 solar radius. 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.

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Document Details

Document Type
Technical Report
Publication Date
Apr 20, 2010
Accession Number
ADA560102

Entities

People

  • David G. Monet
  • David Koch
  • Douglas Caldwell
  • Edward Dunham
  • Gibor Basri
  • Jason F. Rowe
  • Natalie Batalha
  • Steve B. Howell
  • Timothy M. Brown
  • William D. Cochran
  • William J. Borucki

Organizations

  • United States Naval Observatory Flagstaff Station

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Amplitude
  • Brightness
  • Diagrams
  • Gravity
  • Instructions
  • Jet Propulsion
  • Luminosity
  • Mass Transfer
  • Observation
  • Observatories
  • Periodic Variations
  • Photometry
  • Physical Properties
  • Radial Velocity
  • Spectroscopy
  • Temperature Gradients

Fields of Study

  • Physics

Readers

  • Psychological Intervention/Treatment for Stress, Anxiety, PTSD, and Related Emotional and Cognitive Health Symptoms.
  • Space Exploration and Orbital Mechanics.

Technology Areas

  • AI & ML
  • Space