The variable stars of NGC 1866

Details The variable stars of NGC 1866 The variable stars of NGC 1866

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....101..490w&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 101, Feb. 1991, p. 490-514, 758-760. Research sponsored by NASA.

Astronomy and Astrophysics

Astronomy

51

Star Clusters, Stellar Spectrophotometry, Variable Stars, Cepheid Variables, Charge Coupled Devices, Light Curve, Magellanic Clouds, Radial Velocity, Red Giant Stars

Scientific paper

A search has been conducted for new variables in the LMC cluster NGC 1866 using new multiepoch CCD photometry. Eight previously unknown Cepheid variables, most near the cluster core, are found. Of the new variables reported by Storm et al. (188), only six of 10 appear to be Cepheids and one of these is not a member. Periods and mean magnitudes and colors for sufficiently uncrowded variables are reported, as is one red giant variable of long period and one Cepheid which is a single-lined spectroscopic binary with a velocity semiamplitude greater than or equal to 10.5 km/s. The variation of light-curve amplitude with position in the instability strip is reported along with an apparently nonvariable star, which is a radial velocity member, in the strip. A true distance modulus of 18.57 + or - 0.01 mag is obtained for the cluster.

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