EDP Sciences
Free access
Volume 410, Number 3, November II 2003
Page(s) 897 - 904
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20031277

A&A 410, 897-904 (2003)
DOI: 10.1051/0004-6361:20031277

Search for solid HDO in low-mass protostars

B. Parise1, T. Simon2, E. Caux1, E. Dartois3, C. Ceccarelli4, J. Rayner2 and A. G. G. M. Tielens5

1  CESR CNRS-UPS, BP 4346, 31028 Toulouse Cedex 04, France
2  Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
3  IAS-CNRS, Bât. 121, Université Paris Sud, 91405 Orsay Cedex, France
4  Laboratoire d'Astrophysique, Observatoire de Grenoble, BP 53, 38041 Grenoble Cedex 09, France
5  SRON, PO Box 800, 9700 AV Groningen, The Netherlands

(Received 21 May 2003 / Accepted 11 August 2003)

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.

Key words: astrochemistry -- ISM: abundances, molecules, lines and bands -- stars: formation -- individual objects: NGC 1333 SVS12, SVS13, L1489 IRS, TMR1

Offprint request: B. Parise, Parise@cesr.fr

SIMBAD Objects

© ESO 2003

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access.

An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account.
    In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.