THE GEMINI NICI PLANET-FINDING CAMPAIGN: DISCOVERY OF A CLOSE SUBSTELLAR COMPANION TO THE YOUNG DEBRIS DISK STAR PZ Tel
THE GEMINI NICI PLANET-FINDING CAMPAIGN: DISCOVERY OF A CLOSE SUBSTELLAR COMPANION TO THE YOUNG DEBRIS DISK STAR PZ Tel
复制标题
双子座 NICI 行星搜寻活动:发现年轻碎片盘恒星 PZ Tel 的近恒星伴星
DOI:
10.1088/2041-8205/720/1/l82
复制
发表时间:
2010
期刊:
影响因子:
--
通讯作者:
Biller B
中科院分区:
文献类型:
--
作者:
Biller B
We report the discovery of a tight substellar companion to the young solar analog PZ Tel, a member of the β Pic moving group observed with high-contrast adaptive optics imaging as part of the Gemini Near-Infrared Coronagraphic Imager Planet-Finding Campaign. The companion was detected at a projected separation of 16.4±1.0 AU (0 farcs 33±0 farcs 01) in 2009 April. Second-epoch observations in 2010 May demonstrate that the companion is physically associated and shows significant orbital motion. Monte Carlo modeling constrains the orbit of PZ Tel B to eccentricities> 0.6. The near-IR colors of PZ Tel B indicate a spectral type of M7±2 and thus this object will be a new benchmark companion for studies of ultracool, low-gravity photospheres. Adopting an age of 12+ 8− 4 Myr for the system, we estimate a mass of 36±6 M Jup based on the Lyon/DUSTY evolutionary models. PZ Tel B is one of the few young substellar companions directly imaged at orbital separations similar to those of giant planets in our own solar system. Additionally, the primary star PZ Tel A shows a 70 μm emission excess, evidence for a significant quantity of circumstellar dust that has not been disrupted by the orbital motion of the companion.
登录
查看更多内容
影响因子:
56.9
作者:
Michael C. Liu
通讯作者:
Michael C. Liu
DOI:
10.1086/501431
发表时间:
2006-01
期刊:
The Astronomical Journal
影响因子:
--
作者:
K. Chiu;X. Fan;S. Leggett;D. Golimowski;W. Zheng;T. Geballe;D. Schneider;J. Brinkmann
通讯作者:
K. Chiu;X. Fan;S. Leggett;D. Golimowski;W. Zheng;T. Geballe;D. Schneider;J. Brinkmann
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
B. Zuckerman;I. Song
通讯作者:
I. Song
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
Michael C. Liu;D. Fischer;J. Graham;J. Lloyd;G. Marcy;R. P. Butler
通讯作者:
R. P. Butler
DOI:
10.1086/522826
发表时间:
2007
期刊:
The Astrophysical Journal
影响因子:
--
作者:
D. Lafreniére;R. Doyon;C. Marois;D. Nadeau;B. Oppenheimer;P. Roche;F. Rigaut;J. Graham;R. Jayawardhana;D. Johnstone;P. Kalas;B. Macintosh;R. Racine
通讯作者:
R. Racine