Black holes or dark clusters in M31 and M32?

Details Black holes or dark clusters in M31 and M32? Black holes or dark clusters in M31 and M32?

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...337...84g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 337, Feb. 1, 1989, p. 84-90. Research supported by NSERC.

Astronomy and Astrophysics

Astrophysics

53

Andromeda Galaxy, Dark Matter, Elliptical Galaxies, Galactic Nuclei, Star Clusters, Collisions, Gravitational Waves, Neutron Stars, Stellar Mass, White Dwarf Stars

Scientific paper

Recent spectroscopic data and dynamical modeling indicate the presence of dark matter within the nuclei of M31 and M32. If these nuclei do not contain massive black holes, the most likely alternative form for the dark matter is a cluster of low-mass stars or degenerate remnants. Here it is shown that simple physical considerations place lower limits of about 0.1 arcsec on the half-mass radii of such clusters if they have survived in their present form over much of the age of the universe. Therefore, Space Telescope observations should rule out such clusters, or resolve them.

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