COROT-1b

 CoRoT-Exo-1 b

항성 앞을 지나가는 COROT-1b의 상상화.
모항성
이름  CoRoT-Exo-1
별자리 외뿔소자리
적경 06h 48m 19s
적위 -03° 06′ 08″
거리 > 460 파섹
겉보기 등급 13.6
궤도요소
평균거리(AU) 0.0254
이심률 0
공전주기 1.5089557 일
궤도경사각 85.1 도
각거리 0.000055 초각
물리적 특징
질량 1.03 MJ
반지름 1.49 RJ
중원소함량 -0.3 [Fe/H]
발견 정보
발견일 2007 년
상태 전문가 회의 발표
외계 행성 목록

COROT-Exo-1b(CoRoT-Exo-1b, GSC 04804-02268b로도 불린다)는 외뿔소자리에 있는, 지구에서 1560광년 떨어진 곳에 있는 외계 행성이다. 이 행성은 황색 왜성 COROT-Exo-1 주위를 돌고 있다. 이 행성은 프랑스가 주관하는 COROT 미션이 찾아낸 최초의 외계 행성이다.

발견

이 행성은 COROT 미션이 발견한 것으로 공포된 존재이다.(COROT은 유럽 우주국이 참여한 CNES 프로젝트이다) 이 행성의 반지름은 지금까지 발견된 뜨거운 목성들 중 매우 큰 편에 속하는데, 구체적 크기는 목성의 1.49배이다. 질량은 목성보다 근소하게 무거운 1.03배이다. 질량에 비해 이처럼 부피가 큰 이유로, 어머니 항성에 가까이 붙어 있기 때문에, 대기 외포부가 가열되어 부풀어 올랐기 때문으로 생각하고 있다.

위상 촬영

2009년 5월 28일자 네이처 지에 천문학자들이 이 행성이 항성 주위를 돌면서 차고 지는 모습을 촬영하는 데 성공했다는 기사가 실렸다. 예전부터 과학자들은 COROT-Exo-1b처럼 항성에 가까이 붙어 돌고 있는 가스 행성은 항성에 조석고정이 되어버려 한 쪽 면이 항성만을 계속 보게 되며, 그로 말미암아 한 쪽은 지나치게 뜨거워지고 다른 한 쪽은 상대적으로 차갑다고 믿어 왔다. 촬영 결과 밤의 부분은 완전히 검어 보이지 않았으며 이는 빛이 비치지 않는 곳의 온도가 그리 높지 않다는 것을 의미한다. 반면 낮 부분은 섭씨 2,000도까지 가열되는 것으로 밝혀졌다.[1]

같이 보기

참고 문헌

  1. Exoplanet phases seen in visible light. msnbc. 2009년 5월 27일 작성, 2009년 6월 16일 확인.

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