SIMBAD references

2016MNRAS.458.1859M - Mon. Not. R. Astron. Soc., 458, 1859-1865 (2016/May-2)

Detection of CH3SH in protostar IRAS 16293-2422.

MAJUMDAR L., GRATIER P., VIDAL T., WAKELAM V., LOISON J.-C., HICKSON K.M. and CAUX E.

Abstract (from CDS):

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 30 m telescope. We observed a single frequency setup with the EMIR heterodyne 3 mm receiver with an Lower Inner 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 4 x 10–9 (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.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): astrochemistry - methods: statistical - ISM: abundances - ISM: evolution - ISM: molecules

CDS comments: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Simbad objects: 6

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2020.01.17-20:21:02

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