DODO巡天的最新结果：对白矮星周围的行星进行成像
Latest Results from the DODO Survey: Imaging Planets around White Dwarfs
摘要：
简并天体周围的简并天体巡天（DODO）的目的是通过直接成像在白矮星周围的宽轨道上寻找质量很低的棕矮星和太阳系外行星。直接探测到这些伴星将允许对温度低于（< 500 K）的物体进行光谱研究，这些物体的温度低于目前观测到的最冷的棕矮星。在白矮星周围发现行星将证明这类天体能够在恒星演化的最后阶段幸存下来，并对其祖先周围的行星系的频率施加限制（质量在1. 5 - 8 M* 之间，即，早B到中F）。越来越多的行星质量伴星在年轻的主序星周围的宽轨道上被直接成像。例如，HR 8799和1 RXS J160929.1 - 210524周围的行星分别在24 - 68 AU和330 AU的宽轨道上。DODO巡天有能力直接对这些系统的主序后类似物中的行星进行成像。这些会议记录介绍了我们对邻近白矮星进行的多历元J波段共同自行巡天的最新结果。
英文摘要：
The aim of the Degenerate Objects around Degenerate Objects (DODO) survey is to search for very low mass brown dwarfs and extrasolar planets in wide orbits around white dwarfs via direct imaging. The direct detection of such companions would allow the spectroscopic investigation of objects with temperatures lower (< 500 K) than the coolest brown dwarfs currently observed. The discovery of planets around white dwarfs would prove that such objects can survive the final stages of stellar evolution and place constraints on the frequency of planetary systems around their progenitors (with masses between 1.5 - 8 M*, i.e., early B to mid-F). An increasing number of planetary mass companions have been directly imaged in wide orbits around young main sequence stars. For example, the planets around HR 8799 and 1RXS J160929.1 - 210524 are in wide orbits of 24 - 68 AU and 330 AU, respectively. The DODO survey has the ability to directly image planets in post-main sequence analogues of these systems. These proceedings present the latest results of our multi-epoch J band common proper motion survey of nearby white dwarfs.
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