Abstract
SiO maser emission from the Bulge IRAS sources has been searched by the v=l, J=l-0 and v=2, J=l-0 transitions to investigate the kinematics of the Galactic Bulge, resulting in a sample of 124 line-of-sight velocities. The rotation velocity, velocity dispersion, and velocity offset at l = 0° for the sample are found to be 9.3∓1.4 km s-1 deg-1, 75.8+6.6 km s-1, and —18.2∓, 9.7 km s-1, respectively (80% confidence interval). Furthermore we find trends for the rotation velocity and velocity dispersion to decrease with distance from the galactic plane. These trends are supported by a larger sample constructed by incorporating other available velocity data on the Bulge IRAS sources. The rotation velocity and velocity dispersion are expressed as 15.6-1.23x|b(deg) | km s-1 deg-1 and 101-3.6 x |b(deg) | km s-1, respectively. The implications of the observed quantities are discussed.
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Izumiura, H. et al. (1993). SIO Maser Survey of the Bulge IRAS Sources. In: Dejonghe, H., Habing, H.J. (eds) Galactic Bulges. International Astronomical Union / Union Astronomique Internationale, vol 153. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0922-2_29
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DOI: https://doi.org/10.1007/978-94-011-0922-2_29
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