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LkCa15 전이 디스크에서 발견된 강착 중에 있는 원시 행성

Accreting protoplanets in the LkCa 15 transition disk
  • 작성자 : KASI
  • 작성일 : 2015-11-23
  • 조회수 : 2266
  • 저자S. Sallum, K. B. Follette et. al.,
  • Absract

     

    Exoplanet detections have revolutionized astronomy, offering new insights into solar system architecture and planet demographics. While nearly 1,900 exoplanets have now been discovered and confirmed, none are still in the process of formation. Transition disks, protoplanetary disks with inner clearings best explained by the influence of accreting planets, are natural laboratories for the study of planet formation. Some transition disks show evidence for the presence of young planets in the form of disk asymmetries or infrared sources detected within their clearings, as in the case of LkCa 15. Attempts to observe directly signatures of accretion onto protoplanets have hitherto proven unsuccessful. Here we report adaptive optics observations of LkCa 15 that probe
    within the disk clearing. With accurate source positions over multiple epochs spanning 2009–2015, we infer the presence of multiple companions on Keplerian orbits. We directly detect Hα emission from the innermost companion, LkCa 15 b, evincing hot (about 10,000 kelvin) gas falling deep into the potential well of an accreting protoplanet.​ 


  • 게재정보NATURE(2015.11.19)에 게재된 논문임
  • 첨부파일
  • 원 문http://www.nature.com/nature/journal/v527/n7578/pdf/nature15761.pdf
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