Physics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006noao.prop..461c&link_type=abstract
NOAO Proposal ID #2006B-0461
Physics
Scientific paper
We propose to use the Keck Interferometer to investigate the origin of CO bandhead emission from DG Tau. The CO emission traces the hot (~3000 K), dense (n ⪆ 10^10 cm^-3), neutral material in the inner regions of circumstellar accretion disks, and as such potentially provides important information about the physical, chemical, and dynamical state of the gas in the region where jet production and accretion take place during the formation of solar-type stars. Here we propose to determine whether the CO emission originates inside the dust destruction radius in the disk, or from a more extended, externally- heated surface layer in the disk photosphere, by comparing the visibility of the 2 (micron) continuum with the visibility of a pixel containing the CO emission.
Akeson Rachel
Chandler Claire
Creech-Eakman Michelle
Moellenbrock George
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