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Shuji Deguchi, Tomomi Shimoikura, Kazutaka Koike, SiO Maser Survey off the Galactic Plane: A Signature of Streaming Motion, Publications of the Astronomical Society of Japan, Volume 62, Issue 3, 25 June 2010, Pages 525–545, https://doi.org/10.1093/pasj/62.3.525
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Abstract
A group of Mira variables in the solar neighborhood shows unusual spatial motion in the Galaxy. To study this motion on a much larger scale in the Galaxy, we newly surveyed 134 evolved stars off the Galactic plane by SiO maser lines, obtaining accurate radial velocities of 84 detected stars. Together with the past data of SiO maser sources, we analyzed the radial-velocity data of a large sample of sources distributed in a distance range of about 0.3–6 kpc in the first Galactic quadrant. At Galactic longitudes between 20