Submillimeter Spectropolarimetry of DG Tau: Probe of Protoplanetary Environments

Details Submillimeter Spectropolarimetry of DG Tau: Probe of Protoplanetary Environments Submillimeter Spectropolarimetry of DG Tau: Probe of Protoplanetary Environments

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21335802k&link_type=abstract

American Astronomical Society, AAS Meeting #213, #358.02; Bulletin of the American Astronomical Society, Vol. 41, p.501

Astronomy and Astrophysics

Astronomy

Scientific paper

SED analyses support the theory that planet formation in circumstellar disks begins with dust coagulation up to about a centimeter in size. However, this method of detecting grain growth is not definitive, as the models suffer degeneracies due to uncertainty in the disk optical depth. We discuss the method of submillimeter spectropolarimetry as a means to probe protoplanetary disks.
We present 350 micron polarization data of DG Tau, collected with the SHARP polarimeter at the Caltech Submillimeter Observatory. This result, combined with a previous measurement obtained at 850 microns by Tamura et. al, represents the first exploration of the submillimeter polarization spectrum of protoplanetary disk emission. Our results suggest considerable structure in the submillimeter polarization spectrum, which is not predicted by current models.

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