Search for solid HDO in low-mass protostars

Parise, Berengere, Simon, T., Caux, E., Dartois, E., Ceccarelli, C., Rayner, J. and Tielens, A. G. G. M. 2003. Search for solid HDO in low-mass protostars. Astronomy and Astrophysics 410 (3) , pp. 897-904. 10.1051/0004-6361:20031277

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Abstract

We present ground-based 2.1 to 4.2 mu m observations of four low-mass protostars. We searched for the 4.1 mu m OD stretch band, characteristic of solid HDO in grain mantles. We did not detect solid HDO in any of the four sources, but we derive 3 sigma upper limits from 0.5% to 2% for the HDO/H 2O ratio depending on the source. These ratios provide strong constraints to solid-state deuteration models when compared to deuterium fractionation values observed in the gas phase. We discuss various scenarios that could lead to such a low water deuteration compared to the high formaldehyde and methanol deuteration observed in the gas-phase.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	astrochemistry; ISM: abundances, molecules, lines and bands; stars: formation; individual objects: NGC 1333 SVS12, SVS13, L1489 IRS, TMR1
Additional Information:	Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0004-6361/ (accessed 17/04/2014)
Publisher:	EDP Sciences
ISSN:	0004-6361
Date of First Compliant Deposit:	30 March 2016
Last Modified:	08 May 2023 15:51
URI:	https://orca.cardiff.ac.uk/id/eprint/52832

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