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Detection of CH3SH in protostar IRAS 16293-2422

hal.structure.identifierAMOR 2016
dc.contributor.authorMAJUMDAR, Liton
hal.structure.identifierAMOR 2016
dc.contributor.authorGRATIER, P.
hal.structure.identifierAMOR 2016
dc.contributor.authorVIDAL, Thomas
hal.structure.identifierAMOR 2016
dc.contributor.authorWAKELAM, Valentine
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorLOISON, Jean-Christophe,
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorHICKSON, Kevin M.,
hal.structure.identifierCentre d'étude spatiale des rayonnements [CESR]
hal.structure.identifierCentre d'étude spatiale des rayonnements [CESR]
dc.contributor.authorCAUX, Emmanuel,
dc.date.issued2016-02
dc.identifier.issn0035-8711
dc.description.abstractEnThe nature of the main sulphur reservoir in star forming regions is a long standing mystery. The observed abundance of sulphur-bearing species in dense clouds is only about 0.1 per cent of the same quantity in diffuse clouds. Therefore, the main sulphur species in star forming regions of the interstellar medium are still unknown. IRAS 16293-2422 is one of the regions where production of S-bearing species is favourable due to its conditions which allows the evaporation of ice mantles. We carried out observations in the 3 mm band towards the solar type protostar IRAS 16293-2422 with the IRAM 30m telescope. We observed a single frequency setup with the EMIR heterodyne 3 mm receiver with an Lower Inner (LI) tuning frequency of 89.98 GHz. Several lines of the complex sulphur species CH3SH were detected. Observed abundances are compared with simulations using the NAUTILUS gas-grain chemical model. Modelling results suggest that CH3SH has the constant abundance of 4e-9 (compared to H2) for radii lower than 200 AU and is mostly formed on the surfaces. Detection of CH3SH indicates that there may be several new families of S-bearing molecules (which could form starting from CH3SH) which have not been detected or looked for yet.
dc.language.isoen
dc.publisherOxford University Press (OUP): Policy P - Oxford Open Option A
dc.subject.enAstrophysics - Astrophysics of Galaxies
dc.title.enDetection of CH3SH in protostar IRAS 16293-2422
dc.typeArticle de revue
dc.identifier.doi10.1093/mnras/stw457
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.identifier.arxiv1602.07619
bordeaux.journalMonthly Notices of the Royal Astronomical Society
bordeaux.page1859-1865
bordeaux.volume458
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-01278887
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01278887v1
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