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First VLBA observations of 28SiO J=1-0, v=3 maser emission from AGB stars

J. F. Desmurs ; V. Bujarrabal ; M. Lindqvist ; J. Alcolea ; R. Soria-Ruiz ; Per Bergman (Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium)
Proceedings of Science. 12th European VLBI Network Symposium and Users Meeting, EVN 2014; Cagliari; Italy; 7 - 10 October 2014 (18248039). Vol. Part F113821 (2014), p. 060.
[Konferensbidrag, övrigt]

The v=1 & v=2 J=1-0 (43 GHz), and v=1 J=2-1 (86 GHz) SiO masers are intense in AGB stars. They have been mapped using VLBI displaying spots ring-like distributions. The rings of the v=1, v=2 J=1-0 masers are similar, but the spots are rarely coincident, while the v=1 J=2-1 maser arises from a well separated region farther out. The v=3 J=1-0 line is not directly affected by any line overlap and its spot structure and position, relative to the other lines, is a good test to the standard pumping models. We present simultaneous single dish and VLBI observations of the v=1, v=2, and v=3 J=1-0 maser transitions of 28SiO in several AGB stars and compare them to model predictions. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.



Denna post skapades 2017-05-17.
CPL Pubid: 249373

 

Institutioner (Chalmers)

Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium (2010-2017)

Ämnesområden

Hållbar utveckling
Astronomi, astrofysik och kosmologi

Chalmers infrastruktur