CCD photometry of globular clusters in NGC 3377

Details CCD photometry of globular clusters in NGC 3377 CCD photometry of globular clusters in NGC 3377

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102..966h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, Sept. 1990, p. 966-971. Research supported by NSER

Other

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Astronomical Photometry, Charge Coupled Devices, Elliptical Galaxies, Globular Clusters, Galactic Clusters, Luminosity, Spatial Distribution

Scientific paper

New CCD photometry to a limit B = 24.3 is presented for a sample of globular clusters around NGC 337, an intermediate-size elliptical in the Leo group. Assuming that the luminosity function of its globular clusters follows the same log-normal form as in other galaxies, a peak frequency level (turnover magnitude) of B(0) = 23.35 + or - 0.40 is derived for a combined sample of clusters in NGC 3377 and NGC 3379. Matching this to the globular clusters in the Milky Way then gives a distance modulus (m - M)B (Leo) = 30.2, or d = (10.7 + or - 2.2) Mpc, in good agreement with other recent distance-scale methods. The clusters around NGC 3377 follow a highly ellipsoidal space distribution; two different tests show that their distribution is at least as flattened as the E6 shape of the galaxy itself.

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