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Spectroscopy of the Globular Clusters in M87

Published online by Cambridge University Press:  04 August 2017

J.R. Mould ,
J.B. Oke  and
J.M. Nemec
J.R. Mould
Affiliation:
Palomar Observatory, Caltech 105-24, Pasadena CA 91125, U.S.A.
J.B. Oke
Affiliation:
Palomar Observatory, Caltech 105-24, Pasadena CA 91125, U.S.A.
J.M. Nemec
Affiliation:
Palomar Observatory, Caltech 105-24, Pasadena CA 91125, U.S.A.

Abstract

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With a velocity dispersion of 370 ± 50 km/sec the globular cluster system of M87 is kinematically hotter than the stars in the giant elliptical itself. This is consistent with the clusters' shallower density distribution for isotropic orbits. the mean metallicity of the 27 clusters in the sample analyzed here is no more than a factor of 2 more metal rich than the cluster system of the Milky Way, but considerably more metal poor than the integrated starlight in the field at a radius of 1' from the center of M87. There is no evidence for the existence of young clusters in the system. the mass-radius relation between 1' and 5' required to contain the globular clusters joins on to that required to contain the hot gas around M87.

Type
Posters
Information
Symposium - International Astronomical Union , Volume 127: Structure and Dynamics of Elliptical Galaxies , 1987 , pp. 451 - 452
Copyright
Copyright © Reidel 1987 

References

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