Properties Of Transitional Disks In Five Young Clusters

Details Properties Of Transitional Disks In Five Young Clusters Properties Of Transitional Disks In Five Young Clusters

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542813k&link_type=abstract

American Astronomical Society, AAS Meeting #215, #428.13; Bulletin of the American Astronomical Society, Vol. 42, p.347

Astronomy and Astrophysics

Astronomy

Scientific paper

Transitional disks are protoplanetary disks around T Tauri stars, with inner holes or gaps which are surrounded by optically thick outer, and often inner, disks. With the Spitzer Space Telescope Infrared Spectrograph, we have observed spectra of more than 60 transitional disks, and several hundred full disks, identified in the Taurus-Auriga, Chamaeleon I, Ophiuchus, and Orion A regions. With these data we have identified several correlations between system properties -- stellar mass, mass accretion rate, and X-ray luminosity -- and disk properties -- the location of the outer wall (the inner edge of the optically thick outer disk), and dust components of the disk, in the wide variety of environments represented by these regions. Details of the structure of the transitional disks, and the trends among the system and disk properties, support strongly the idea that they are created by the gravitational influence of one or more companions, usually of substellar mass. There seems to be no tendency for the transitional-disk fraction of the Class II YSO population to increase greatly with age in the range covered by our sample, 0.5-3 Myr.

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