The variable stars of NGC 1866
- McMaster Univ., Hamilton (Canada) Observatories of the Carnegie Institution, Pasadena, CA (USA) JPL, Pasadena, CA (USA)
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. 36 refs.
- OSTI ID:
- 5914227
- Journal Information:
- Astronomical Journal; (USA), Vol. 101; ISSN 0004-6256
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
STAR CLUSTERS
DISTANCE
VARIABLE STARS
PHOTOMETRY
BRIGHTNESS
CEPHEIDS
CHARGE-COUPLED DEVICES
COLOR
MAGELLANIC CLOUDS
RADIAL VELOCITY
RED GIANT STARS
SPECTROPHOTOMETRY
GALAXIES
GIANT STARS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHYSICAL PROPERTIES
PULSATING VARIABLE STARS
SEMICONDUCTOR DEVICES
STARS
VELOCITY
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources