The Maser Emitting Structure and Time Variability of the SIS Lines J = 14 - 13 and 15 - 14 in IRC+10216.

ABSTRACT: We present new high angular resolution interferometer observations of the υ = 0 J = 14 - 13 and 15 - 14 SiS lines towards IRC+10216, carried out with CARMA and ALMA. The maps, with angular resolutions of ≃0⋅″25and0⋅″55, reveal (1) an extended, roughly uniform, and weak emission with a size of ≃0⋅″5, (2) a component elongated approximately along the East-West direction peaking at ≃0⋅″13and0⋅″17 at both sides of the central star, and (3) two blue- and red-shifted compact components peaking around 0⋅″07 to the NW of the star. We have modeled the emission with a 3D radiation transfer code finding that the observations cannot be explained only by thermal emission. Several maser clumps and one arc-shaped maser feature arranged from 5 to 20R_⋆ from the central star,

SUBMITTER: Fonfria JP 

PROVIDER: S-EPMC6029660 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature