On The Nature Of The Transition Disk Around Lkca 15

Details On The Nature Of The Transition Disk Around Lkca 15 On The Nature Of The Transition Disk Around Lkca 15

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934407i&link_type=abstract

American Astronomical Society, AAS Meeting #219, #344.07

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Scientific paper

CARMA 1.3 mm continuum observations resolve the LkCa 15 circumstellar disk on a spatial scale of 25 AU and reveal a large inner gap in the dust emission. By comparing the observations with theoretical disk models, we calculate that the dust emission arises from an azimuthally symmetric ring that extends between 40-120 AU. The continuum cavity is consistent with either a sharp drop of the 1.3 mm dust optical depth at 42.5 AU or a smooth inward decrease between 3-85 AU. We argue that distinguishing between these two scenarios is a crucial step to understand the nature of dust continuum cavity, and of transition disks in general. We show that our forthcoming Band 9 Cycle 0 ALMA observations will be able to disentangle these two scenarios with high significance. These observations will ultimately enable us to understand whether the cavities observed in transition disks are formed by the presence of Jupiter size planets or by other physical processes.

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