AM-4 - The poorest globular cluster?

Details AM-4 - The poorest globular cluster? AM-4 - The poorest globular cluster?

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....93.1166i&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 93, May 1987, p. 1166-1171.

Astronomy and Astrophysics

Astronomy

24

Color-Magnitude Diagram, Globular Clusters, Metallicity, Stellar Luminosity, Dark Matter, Halos, Main Sequence Stars, Radial Velocity

Scientific paper

AM-4 is found to be a very low-luminosity (Mv ≡ +0.2 mag) and (probably) low-metallicity globular cluster. Its brightest stars are those in the vicinity of the main-sequence turnoff at V ≡ 21.0 mag. Its total mass is almost certainly less than 1000 M_sun;. The cluster probably lies between 25 and 35 kpc from the Sun and from the Galactic center, and about 15 to 20 kpc above the Galactic plane.

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