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KOI-3278 : 쌍성계의 자체렌즈효과

KOI-3278: A Self-Lensing Binary Star System
  • 작성자 : KASI
  • 작성일 : 2014-04-29
  • 조회수 : 3328
  • 저자Ethan Kruse, Eric Agol
  • AbsractOver 40% of Sun-like stars are bound in binary or multistar systems. Stellar
    remnants in edge-on binary systems can gravitationally magnify their companions,
    as predicted 40 years ago. By using data from the Kepler spacecraft, we report
    the detection of such a “self-lensing” system, in which a 5-hour pulse of 0.1%
    amplitude occurs every orbital period. The white dwarf stellar remnant and its
    Sun-like companion orbit one another every 88.18 days, a long period for a white
    dwarf–eclipsing binary. By modeling the pulse as gravitational magnification
    (microlensing) along with Kepler’s laws and stellar models, we constrain the
    mass of the white dwarf to be ~63% of the mass of our Sun. Further study of this
    system, and any others discovered like it, will help to constrain the physics of
    white dwarfs and binary star evolution.

     




  • 게재정보SCIENCE(2014.4.18)에 실린 천문우주분야 연구논문을 게시함
  • 첨부파일
  • 원 문http://www.sciencemag.org/content/344/6181/275.full
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