Bright Debris Disk Candidates Observed with AKARI/Far-Infrared Surveyor (FIS)

Дата и время публикации : 2013-08-26T14:19:27Z

Авторы публикации и институты :
Qiong Liu
Tinggui Wang
Peng Jiang

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 29 pages, 5 figures
Первичная категория: astro-ph.EP

Все категории : astro-ph.EP

Краткий обзор статьи: We cross-correlate hip main-sequence star catalog with fis catalog, and identify 136 stars (at $>90$% reliability) with far-infrared detections at least in one band. After rejecting 51 stars classified as young stellar objects, Be stars, other type stars with known dust disks or with potential contaminations and 2 stars without infrared excess emission, we obtain a sample of 83 candidate stars with debris disks. Stars in our sample cover spectral types from B to K-types with most being early types. This represents an unique sample of luminous debris disks that derived uniformly from all sky survey with a spatial resolution a factor of two better than the previous such survey by iras. Moreover, by collecting the infrared photometric data from other public archives, 85% of them have infrared excesses in more than one bands, allowing the estimate of the dust temperatures. We fit the blackbody model to the broad band spectral energy distribution of these stars to derive the statistical distribution of the disk parameters. 7 stars require an additional warm component of temperature around 200 K. While a substantial fraction of our sample(58 stars) have weak 12 micron excess indicating that a warm dust component maybe common among these bright debris disk systems.

Category: Physics