SiO Maser Survey of Southern IRAS Sources

Details SiO Maser Survey of Southern IRAS Sources SiO Maser Survey of Southern IRAS Sources

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pasj...53..305d&link_type=abstract

Publications of the Astronomical Society of Japan, vol.53, no. 2, p. 305-314.

Astronomy and Astrophysics

Astronomy

11

Galaxy: Kinematics And Dynamics, Galaxy: Structure, Radio Lines: Stars, Stars: Late-Type

Scientific paper

We have surveyed 163 southern IRAS sources in the SiO J = 2 - 1 v = 1 maser line at 86 GHz, obtaining 38 (22 new and 16 previously known) detections. These detections include 6 stars not previously detected in OH 1612 MHz surveys, and 4 sources assigned incorrect OH radial velocities. The distance reachable in this survey turned out to be about 4 kpc. The local velocity dispersion near the Sun were found to be approximately 30 km s-1 for these IRAS/SiO sources. A relatively high concentration of the SiO detected sources were found at the area 320° < l < 340° (toward ``Norma tangent''). The estimated distances for these sources suggest that this concentration is spread between 2 and 6 kpc from the Sun, peaking on the Scutum-Crux arm.

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