The abundance of C¹⁸8O and HDO in the envelope and hot core of the intermediate mass protostar NGC 7129 FIRS 2

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DOIResolve DOI: http://doi.org/10.1051/0004-6361/201118478
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TypeArticle
Journal titleAstronomy & Astrophysics
ISSN0004-6361
1432-0746
Volume540
Article numberA75
AbstractContext. NGC 7129 FIRS 2 is a young intermediate-mass (IM) protostar, which is associated with two energetic bipolar outflows and displays clear signs of the presence of a hot core. It has been extensively observed with ground based telescopes and within the WISH guaranteed time Herschel key program. Aims. This paper is dedicated to the modeling of the C18O and HDO lines in NGC 7129 FIRS 2. Our goal is to investigate the chemistry in the envelope and hot core of this IM protostar. Conclusions.Herschel data combined with ground based observations have allowed us to estimate the C18O and HDO abundance in the protostellar envelope and hot core of an IM protostar. The HDO abundance in the hot core is ~0.4−1 × 10^-7, similar to that found in the hot corinos NGC 1333 IRAS 2A and IRAS 16293−2422. The C18O abundance, at ≈ 1.6 × 10^-8, is a factor of 10 lower than the reference value.
Publication date
LanguageEnglish
AffiliationNRC Herzberg Institute of Astrophysics; National Research Council Canada
Peer reviewedYes
NPARC number21268987
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Record identifiere91c2e84-9b21-4f8a-b742-35053fdbe7d7
Record created2013-11-29
Record modified2016-05-09
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