Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/2635
Share/Export:
logo share SHARE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Title

The abundance of 36S in IRC+10216 and its production in the Galaxy

AuthorsGallino, R.; Cernicharo, José CSIC ORCID; Henkel, C.; Ott, U.; Mauersberger, R.
KeywordsStars: abundances
Stars: AGB and post-AGB
Stars: individual: IRC+10216
ISM: abundances
Radio lines: stars
Issue Date30-Jun-2004
PublisherEuropean Southern Observatory
CitationarXiv:astro-ph/0407003v1
Astron.Astrophys. 426 (2004) 219-227
AbstractThe J=2-1 and 3-2 rotational lines of the rare isotopomer C36S and the J=5-4 and 6-5 transitions of Si36S were detected in the carbon star IRC+10216 (CW Leo). These are the first detections of 36S bearing molecules in a star and the first spectroscopic detection of Si36S. From a comparison of 34S and 36S bearing isotopomers, th 34S/36S isotopic ratio is 107(+-15). This value is comparable to values in the interstellar medium of the inner Galactic disk (115) but is smaller than the solar value of 288 (Ding et al. 2001). The increase of the 36S abundance relative to 34S only qualitatively follows model predictions of a low mass AGB star. Quantitative agreement of the observed 34S/36S ratio with the stellar models can be reached if the age of IRC+10216 and Galactic chemical evolution are taken into account. Other less likely possibilities are the presence of considerable inhomogeneities in the interstellar medium and either IRC+10216 or the Sun started with a peculiar 36S abundance. Other production mechanisms potentially capable of enhancing the Galactic interstellar medium are discussed. From the observed line density toward IRC+10216 and toward Galactic star forming regions, we estimate the confusion limit toward those sources.
URIhttp://hdl.handle.net/10261/2635
DOI10.1051/0004-6361:20040451
ISSN1432-0746
Appears in Collections:(CFMAC-IEM) Artículos

Files in This Item:
File Description SizeFormat
26.pdf524,1 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work

WEB OF SCIENCETM
Citations

34
checked on Dec 2, 2021

Page view(s)

328
checked on Jan 25, 2022

Download(s)

104
checked on Jan 25, 2022

Google ScholarTM

Check

Altmetric

Dimensions


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.