Molecular Line Observations of the SiO Maser Source IRAS 19312+1950

Details Molecular Line Observations of the SiO Maser Source IRAS 19312+1950 Molecular Line Observations of the SiO Maser Source IRAS 19312+1950

2008-02-28

arxiv.org/abs/0802.4132v1

Astronomy and Astrophysics

Astrophysics

2 pages, 1 figure, iaus.cls, to appear in IAU Symp. 251 proceedings (Organic Matter in Space). Poster is available at http:/

Scientific paper

10.1017/S1743921308021467

IRAS 19312+1950 is a unique SiO maser source, exhibiting a rich set of molecular radio lines, although SiO maser sources are usually identified as oxygen-rich evolved stars, in which chemistry is relatively simple comparing with carbon-rich environments. The rich chemistry of IRAS 19312+1950 has raised a problem in circumstellar chemistry if this object is really an oxygen-rich evolved star, but its evolutional status is still controversial. In this paper, we briefly review the previous observations of IRAS 19312+1950, as well as presenting preliminary results of recent VLBI observations in maser lines.

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