| タイトル | Signposts of Planet Formation in the Disk of GM Aur |
| 本文（外部サイト） | http://hdl.handle.net/2060/20120001860 |
| 著者（英） | Williger, Gerard; Grady, Carol; Perrin, M.; Brown, A.; Hornbeck, Jeremy; Wisniewski, J. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2011-10-18 |
| 言語 | eng |
| 内容記述 | Rice et al. noted that transitional disks hosting massive Jovian-mass planets should have suppressed accretion onto the star, while bringing about an absence of silicate emission. Their models also predict systems with less massive planets should permit small grain dust and some gas to filter into the cavity, leaving larger grains confined to the outer disk. Such systems are expected to have polarized light originating within the cavity, silicate emission, and small-grain reflection nebulosity detectable in FUV high-contrast imagery. A further consequence is that molecular gas should be less abundant in the inner disk due to photodissociation by the stellar FUV radiation field. GM Aur is a T-Tauri star/transitional disk system, where both silicate emission and a 24 AU cavity has been detected. We continue the analysis of GM Aur with FUV and optical HST imagery and report the presence of small-grain reflection nebulosity detected from 1400 - 2000 A in the cavity region, as well as a molecular outflow that has an inner radius corresponding to the cavity wall. These data, together with the presence of silicate emission, suggest that GM Aur hosts a planet with likely mass between 1 and 5 Mass of Jupiter |
| NASA分類 | Astronomy |
| レポートNO | GSFC.ABS.5541.2011 |
| 権利 | Copyright, Distribution under U.S. Government purpose rights |
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