Radial dust size gradient in the HD100546 disk

Details Radial dust size gradient in the HD100546 disk Radial dust size gradient in the HD100546 disk

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atnf.prop.2456w&link_type=abstract

ATNF proposal C996, Semester: July, 2009

Computer Science

Stellar, Atca

Scientific paper

Multiple lines of evidence suggest that planet formation is proceeding in the disk around the several Myr old Herbig Be star HD100546. The relative proximity of this star at 100 pc allows spatial resolution with ATCA down to several tens of AU. Our previous ATCA observations have indeed allowed us to detect structure in the disk, including two subsidiary emission peaks accompanying the central peak at 3 mm, and a possible higher proportion of larger grains in the inner disk (inferred from different disk sizes at 3, 7 and 16 mm). What we have thus far failed to do however is obtain a spectral index image of the disk. The CABB on ATCA now offers this opportunity. This could provide unambiguous evidence of a radial grain size dependence, and hence stringently test models of planet formation whereby the larger particles are predicted to settle to the disk midplane and migrate inwards.

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