文章基本信息

标题：Circumstellar SiO masers in the long-period variable star TXCam
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作者：R. Soria-Ruiz ; F. Colomer ; J. Alcolea, V.,Bujarrabal 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2006
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present the latest results of a multi-line study of SiO circumstellar masers in oxygen-rich AGB stars using the VLBA. In particular, we have studied several maser lines at 43 GHz (v=1 and v=2) and at 86 GHz (v=1 and v=2) of 28SiO, and for the first time we have been able to map the emission of the ground state v=0 J=1–0 of 29SiO and the v=2 J=2–1 maser line of 28SiO. In TXCam, the 3-mm emission is produced in an outer region of the circumstellar envelope, as it has been already observed in other late-type stars. We also discuss the importance of these new detections in the framework of the SiO maser pumping models.