Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-07-13
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
5 pages, 3 figures. Accepted for publication in the Herschel HIFI special issue of A&A
Scientific paper
We performed a sensitive search for the ground-state emission lines of ortho- and para-water vapor in the DM Tau protoplanetary disk using the Herschel/HIFI instrument. No strong lines are detected down to 3sigma levels in 0.5 km/s channels of 4.2 mK for the 1_{10}--1_{01} line and 12.6 mK for the 1_{11}--0_{00} line. We report a very tentative detection, however, of the 1_{10}--1_{01} line in the Wide Band Spectrometer, with a strength of T_{mb}=2.7 mK, a width of 5.6 km/s and an integrated intensity of 16.0 mK km/s. The latter constitutes a 6sigma detection. Regardless of the reality of this tentative detection, model calculations indicate that our sensitive limits on the line strengths preclude efficient desorption of water in the UV illuminated regions of the disk. We hypothesize that more than 95-99% of the water ice is locked up in coagulated grains that have settled to the midplane.
Bachiller Rafael
Baudry Alain
Bell Thomas A.
Benedettini Milena
Benz Arnold O.
No associations
LandOfFree
Sensitive limits on the abundance of cold water vapor in the DM Tau protoplanetary disk does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Sensitive limits on the abundance of cold water vapor in the DM Tau protoplanetary disk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensitive limits on the abundance of cold water vapor in the DM Tau protoplanetary disk will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-351020