86 GHz SiO maser survey of late-type stars in the inner Galaxy

Details 86 GHz SiO maser survey of late-type stars in the inner Galaxy 86 GHz SiO maser survey of late-type stars in the inner Galaxy

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003assl..283..363m&link_type=abstract

In: Mass-losing pulsating stars and their circumstellar matter. Workshop, May 13-16, 2002, Sendai, Japan, edited by Y. Nakada, M

Astronomy and Astrophysics

Astrophysics

Stars: Late-Type, Masers, Galaxy: Kinematics And Dynamics

Scientific paper

We present observations of 86 GHz (J=2-1, v=1) SiO maser emission in the inner Galaxy. Using the IRAM 30m telescope, we targeted late-type stars selected from the ISOGAL and MSX catalogues, in order to measure radial velocities of a large number of stars. Our 255 new measurements double the number of maser line-of-sight velocities known toward the inner Galaxy. Combining our measurements with those from other surveys, in particular OH maser surveys, will allow a kinematic analysis of the stellar orbits in the inner Galaxy. Analyzing the colours and luminosities of OH and SiO maser emitters also yields new clues on the conditions under which different masers may occur.

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