Globular clusters and the Virgo cluster distance modulus

Details Globular clusters and the Virgo cluster distance modulus Globular clusters and the Virgo cluster distance modulus

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mnras.180..309h&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 180, Aug. 1977, p. 309-321. Research supported by the National Research

Astronomy and Astrophysics

Astronomy

61

Astronomical Photometry, Globular Clusters, Luminous Intensity, Virgo Galactic Cluster, Astronomical Models, Cepheid Variables, Distance, Distribution Functions, Interstellar Extinction

Scientific paper

Photometry for the globular clusters associated with 20 bright galaxies in the Virgo cluster is used in an evaluation of a pure Population II distance modulus for the Virgo cluster of galaxies. The assumption of a normally distributed universal globular-cluster luminosity function, calibrated in the Galaxy sample of globulars and based upon an absolute magnitude of 0.6 for RR Lyrae stars in globular clusters, leads to Virgo-cluster distance-modulus estimates near 30.4 magnitudes, with an uncertainty of + or - 0.5 magnitude. Confirmation of a model-independent nature is presented.

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