H band Image of a Planetary Companion around HR 8799 in 2002

Details H band Image of a Planetary Companion around HR 8799 in 2002 H band Image of a Planetary Companion around HR 8799 in 2002

2009-03-11

arxiv.org/abs/0903.1919v1

Astrophys.J.696:L1-L5,2009

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

14 pages, 4 figures, accepted for publication in ApJ Letter

Scientific paper

10.1088/0004-637X/696/1/L1

The discovery of three planetary companions around HR 8799 (Marois et al. 2008) marked a significant epoch in direct imaging of extrasolar planets. Given the importance of this system, we re-analyzed H band images of HR 8799 obtained with the Subaru 36-elements adaptive optics (AO) in July 2002. The low-order AO imaging combined with the classical PSF-subtraction methods even revealed the extrasolar planet, HR 8799b. Our observations in 2002 confirmed that it has been orbiting HR 8799 in a counter-clockwise direction. The flux of HR 8799b was consistent with those in the later epochs within the uncertainty of 0.25 mag, further supporting the planetary mass estimate by Marois et al. (2008).

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