Unveiling the Innermost Regions of Protoplanetary Disks with Gaps and Holes

Details Unveiling the Innermost Regions of Protoplanetary Disks with Gaps and Holes Unveiling the Innermost Regions of Protoplanetary Disks with Gaps and Holes

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21534607e&link_type=abstract

American Astronomical Society, AAS Meeting #215, #346.07; Bulletin of the American Astronomical Society, Vol. 42, p.528

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Scientific paper

In their initial stages of formation planets should interact with the accretion disk surrounding the newborn star, clearing the material around themselves and leaving behind an observational signature in the form of gaps in the primordial disk. Stars surrounded by disks with inner holes have been detected with Spitzer IRS spectra and are now labeled as "transitional disks." Our analysis of IRAC broad-band photometry and IRS spectra with irradiated accretion disk models isolated the earliest stages of planet formation in the disk. This new class of "pre-transitional disks" has an inner optically thick disk separated from an outer optically thick disk by an optically thin gap. Near-infrared spectra with SpeX provided the first confirmation of a gap in the pre-transitional disk of LkCa 15 by verifying that the near-infrared excess emission in this object was due to an optically thick inner disk. Here we present similar data for several other pre-transitional disk candidates, demonstrating that they have optically thick inner disks as well. We also present SpeX spectra of transitional disks and illustrate the differences between the inner disks of pre-transitional and transitional disks.

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