A TREND BETWEEN COLD DEBRIS DISK TEMPERATURE AND STELLAR TYPE: IMPLICATIONS FOR THE FORMATION AND EVOLUTION OF WIDE-ORBIT PLANETS

被引:68
作者
Ballering, Nicholas P. [1 ]
Rieke, George H. [1 ]
Su, Kate Y. L. [1 ]
Montiel, Edward [1 ]
机构
[1] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA
关键词
circumstellar matter; infrared: stars; interplanetary medium; SPITZER-SPACE-TELESCOPE; MAIN-SEQUENCE STARS; LOW-MASS STARS; MULTIBAND IMAGING PHOTOMETER; SOLAR-TYPE DWARFS; CA-II H; NEARBY STARS; CHROMOSPHERIC-ACTIVITY; INFRARED SPECTROGRAPH; GIANT PLANETS;
D O I
10.1088/0004-637X/775/1/55
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Cold debris disks trace the limits of planet formation or migration in the outer regions of planetary systems, and thus have the potential to answer many of the outstanding questions in wide-orbit planet formation and evolution. We characterized the infrared excess spectral energy distributions of 174 cold debris disks around 546 main-sequence stars observed by both the Spitzer Infrared Spectrograph and the Multiband Imaging Photometer for Spitzer. We found a trend between the temperature of the inner edges of cold debris disks and the stellar type of the stars they orbit. This argues against the importance of strictly temperature-dependent processes (e.g., non-water ice lines) in setting the dimensions of cold debris disks. Also, we found no evidence that delayed stirring causes the trend. The trend may result from outward planet migration that traces the extent of the primordial protoplanetary disk, or it may result from planet formation that halts at an orbital radius limited by the efficiency of core accretion.
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页数:14
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