Molecular Line Observations of the SiO Maser Source IRAS 19312+1950
Abstract
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.
Keywords
Cite
@article{arxiv.0802.4132,
title = {Molecular Line Observations of the SiO Maser Source IRAS 19312+1950},
author = {Jun-ichi Nakashima and Shuji Deguchi and Hiroshi Imai and Athol Kemball},
journal= {arXiv preprint arXiv:0802.4132},
year = {2009}
}
Comments
2 pages, 1 figure, iaus.cls, to appear in IAU Symp. 251 proceedings (Organic Matter in Space). Poster is available at http://www.geocities.jp/nakashima_junichi/