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CHAOS: The Cornell High-order Adaptive Optics Survey for brown dwarfs | |
Carson, J; Eikenberry, S; Brandl, B; Wilson, JC | |
通讯作者 | Carson, J |
会议名称 | 211th Symposium of the International-Astronomical-Union |
会议日期 | MAY 20-24, 2002 |
会议地点 | BIG ISL, HAWAII |
英文摘要 | The Cornell High-order Adaptive Optics Survey for brown dwarfs (CHAOS), currently about 90% complete, uses the Palomar Hale Telescope's adaptive optics system to survey 80 bright stars out to 13 parsecs. Using the telescope's AO Science camera; brown dwarf companions 4-200 AU can be identified using coronagraphic imaging and spectroscopic modes. We will be using monte carlo simulations to create population models consistent with the CHAOS data set. Currently, we have observed 70 systems out of a target sample of 80. Five candidate companions await follow-up observations. As of now, no systems in the target sample have shown strong evidence of having brown dwarf companions. These early results support previous speculations of a "brown dwarf desert" at orbital separations out to 200 AU. While the target sources revealed no evidence of brown dwarf companions, accompanying observations of calibration stars provided evidence of an early methane dwarf candidate around the, binary system HD150451AB. Forty seven parsecs from earth, the candidate indicated a projected orbital separation of 280 AU. |
来源出版物 | BROWN DWARFS |
ISSN | 0074-1809 |
出版年 | 2003 |
期号 | 211 |
页码 | 271-274 |
ISBN | 1-58381-132-X |
出版者 | ASTRONOMICAL SOC PACIFIC |
类型 | Article;Proceedings Paper |
语种 | 英语 |
国家 | USA;Chile |
收录类别 | CPCI-S ; SCI-E |
WOS记录号 | WOS:000184043700056 |
WOS类目 | Astronomy & Astrophysics |
WOS研究方向 | Astronomy & Astrophysics |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/294109 |
作者单位 | (1)Cornell Univ, Ithaca, NY 14853 USA;(2)AURA, Gemini Observ, La Serena, Chile |
推荐引用方式 GB/T 7714 | Carson, J,Eikenberry, S,Brandl, B,et al. CHAOS: The Cornell High-order Adaptive Optics Survey for brown dwarfs[C]:ASTRONOMICAL SOC PACIFIC,2003:271-274. |
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