Observations of HDO in the high-mass formation regions
- Others:
- Rozanska, A.
- Bejger, M.
Abstract
Deuterated species are powerful tools to study the physical structure and dynamics of protostellar envelopes, yet their observations are still scarce. We present observations of the ground state 1(0),(1)-0(0,0) rotational transition of HDO at 464.925 GHz and the 1(1,0)-1(0,1) transition at 509.292 towards three high-mass star forming regions, carried out with the Caltech Submillimeter Observatory. The latter transition is observed for the first time from the ground. The HDO lines are modeled using a spherically symmetric radiative transfer code to derive the radial distribution of the HDO abundance in the target sources. The abundance profile is divided into an inner hot core region, with T > 100 K and a cold outer envelope with T < 100 K. The El(2)(18)O observations from Flagey et al. (2013) are used to calculate the H_2O abundance profile and thus, allow us to constrain the HDO/H_2O ratio in the envelopes of high-mass star forming regions.
Additional Information
© 2016 Polish Astronomical Society.Additional details
- Eprint ID
- 83439
- Resolver ID
- CaltechAUTHORS:20171127-091234807
- Created
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2017-11-27Created from EPrint's datestamp field
- Updated
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2019-10-03Created from EPrint's last_modified field
- Series Name
- Proceedings of the Polish Astronomical Society