Sulfur Chemistry in L1157-B1

Jonathan Holdship , Izaskun Jimenez-Serra , Serena Viti , Claudio Codella (1) , Milena Benedettini , Francesco Fontani , Mario Tafalla , Rafael Bachiller , Cecilia Ceccarelli (1) , Linda Podio

1 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble

The main carrier of sulfur in dense clouds, where it is depleted from the gas phase, remains a mystery. Shock waves in young molecular outflows disrupt the ice mantles and allow us to directly probe the material that is ejected into the gas phase. A comprehensive study of sulfur-bearing species toward L1157-B1, a shocked region along a protostellar outflow, has been carried out as part of the IRAM-30 m large program ASAI. The data set contains over 100 lines of CCS, H₂CS, OCS, SO, SO₂, and isotopologues. The results of these observations are presented, complementing previous studies of sulfur-bearing species in the region. The column densities and fractional abundances of these species are measured and together these species account for 10% of the cosmic sulfur abundance in the region. The gas properties derived from the observations are also presented, demonstrating that sulfur bearing species trace a wide range of different gas conditions in the region.

Mots clés: ISM: molecules; radio lines: ISM; stars: formation; submillimeter: ISM; Astrophysics - Astrophysics of Galaxies

Domaines: Planète et Univers [physics]

Jonathan Holdship, Izaskun Jimenez-Serra, Serena Viti, Claudio Codella, Milena Benedettini, et al.. Sulfur Chemistry in L1157-B1. The Astrophysical Journal, 2019, 878, ⟨10.3847/1538-4357/ab1cb5⟩. ⟨insu-03703853⟩