MAJUMDAR, Liton; GRATIER, P.; VIDAL, Thomas; WAKELAM, Valentine; LOISON, Jean-Christophe,; HICKSON, Kevin M.,; CAUX, Emmanuel,

doi:10.1093/mnras/stw457

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

MAJUMDAR, Liton
AMOR 2016

GRATIER, P.
AMOR 2016

VIDAL, Thomas
AMOR 2016

Langue

Article de revue

Ce document a été publié dans

Monthly Notices of the Royal Astronomical Society. 2016-02, vol. 458, n° 2, p. 1859-1865

Oxford University Press (OUP): Policy P - Oxford Open Option A

Résumé en anglais

The 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.< Réduire

Mots clés en anglais

Astrophysics - Astrophysics of Galaxies

Métadonnées

Licence d’utilisation du document

Detection of CH3SH in protostar IRAS 16293-2422

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

DOI

Origine

Unités de recherche