Early Results From The Herschel Key Program: Dust, Ice, And Gas In Time (DIGIT)

Details Early Results From The Herschel Key Program: Dust, Ice, And Gas In Time (DIGIT) Early Results From The Herschel Key Program: Dust, Ice, And Gas In Time (DIGIT)

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21720204e&link_type=abstract

American Astronomical Society, AAS Meeting #217, #202.04; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

I will present results that are in hand by the time of the meeting from the DIGIT Key Program. The program includes full PACS spectroscopy of both embedded objects and disks around stars, as well as some HIFI observations and PACS photometry of selected wTTs. Results so far show that embedded sources very commonly have emission from highly excited states of CO, OH, and water, as well as fine structure lines from OI. The analysis of the CO data via rotation diagrams indicates that there are both warm (T around 300 K) and hot (T above 1000 K) components. The OH and water lines primarily arise in somewhat lower temperature regions. The limited data on disks reveals a nearly pure forsterite feature and highly excited CO lines in the disk around HD100546. This work is supported by JPL Contract No. 1358118.

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