The Mass of M31

Details The Mass of M31 The Mass of M31

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pasp...93..428v&link_type=abstract

Publications of the Astronomical Society of the Pacific, Vol. 93, P. 428, 1981

Astronomy and Astrophysics

Astronomy

14

Scientific paper

The projected mass method of Bahcall and Tremaine has been used to derive the mass of the core of M31. From the observed radial velocities of 43 globular clusters, the mass interior to ˜ 30' is found to be MI = (9 ± 2) × 1010 Msun. For six clusters with ˜ 100' MI = (2.4 ± 1.2) × 1011 Msun. From the observed radial velocities of M32, M33, NGC 147, NGC 185, NGC 205, and LGS 3, the total mass of the Andromeda Subgroup of the Local Group is calculated to be MI = (7.5 ± 3.9) × 1011 9) Msun.

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