Surface brightness fluctuations and the distance to the Virgo Cluster

Details Surface brightness fluctuations and the distance to the Virgo Cluster Surface brightness fluctuations and the distance to the Virgo Cluster

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...346l..57t&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 346, Nov. 15, 1989, p. L57-L60.

Astronomy and Astrophysics

Astrophysics

52

Brightness Distribution, Elliptical Galaxies, Galactic Bulge, Virgo Galactic Cluster, Charge Coupled Devices, Globular Clusters, Hubble Constant, Power Spectra

Scientific paper

Preliminary results from a project to measure the fluxes of giant stars in M32, NGC 3379, and five Virgo Cluster galaxies are presented. Since the Virgo Cluster galaxies are approximately equidistant, variations in observed fluctuation amplitude from galaxy to galaxy can be ascribed to variations in absolute luminosity of the giant stars in the galaxies. Assuming a distance of 0.72 Mpc for M32 and correcting for the color effect in m-bar, the typical brightness of giant stars, distances of 9 Mpc for NGC 3379 and 14 Mpc for Virgo, accurate to about 10 percent, are derived. This is used to find a Hubble constant of 88 km/s/Mpc. The method can be used to measure m-bar in galaxies at least 40-50 Mpc distant.

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