The frequency distributions of long-period variables in and around globular clusters

Details The frequency distributions of long-period variables in and around globular clusters The frequency distributions of long-period variables in and around globular clusters

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aj.....84.1701h&link_type=abstract

Astronomical Journal, vol. 84, Nov. 1979, p. 1701-1704.

Astronomy and Astrophysics

Astronomy

2

Frequency Distribution, Globular Clusters, Milky Way Galaxy, Star Distribution, Variable Stars, Astronomical Catalogs, Galactic Structure, Mira Variables

Scientific paper

The frequency distributions of Mira-type variables in wide areas around globular clusters are examined in order to determine whether apparent concentrations around a cluster can be used to infer cluster membership. The number of long-period variables in each 15 x 15 arcmin area within 4 x 4 deg grids surrounding 10 NGC clusters are charted. Examination of the charts reveals that in rich star fields such as Sagittarius, it is not justifiable to infer cluster membership on the basis of apparent concentrations, while at high galactic latitudes, as in the case of 47 Tuc, the frequency criterion appears valid. It is also noted that surrounding frequency distributions may not be applied to deny cluster membership.

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