Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...299..728c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 299, Dec. 15, 1985, p. 728-740. Research supported by the Southeast Missour
Astronomy and Astrophysics
Astrophysics
6
Blue Stars, Cepheid Variables, Giant Stars, Magellanic Clouds, Variable Stars, Astronomical Photometry, Interstellar Extinction, Light Curve, Mass Distribution, Radial Velocity, Stellar Luminosity, Stellar Magnitude
Scientific paper
Examination of existing photographic photometry of the foreground RR Lyrae stars in the direction of the LMC reveals that the faintest have a magnitude distribution similar to the faintest LMC Cepheids. A rough P-L relationship exists for these same stars that suggests they may be members of the LMC and not foreground RR Lyrae stars. UBV photoelectric photometry and radial velocity data are presented for a sample of eight of these variables. Of the eight stars, one appears to be a normal 7-day period Cepheid, one has an indeterminate period of less than 1 day, one has its period revised by a factor of 2 to 0.91 days and is apparently the shortest period LMC Cepheid known, and the remaining five appear to have normal RR Lyrae-star light curves. The Blazhko effect is possibly observed in three of the variables. The five RR Lyrae variables give a foregound reddening of 0.03 using the method of Sturch 1966, 1977 for RR Lyrae stars and are in good agreement with the relationship for rise time and period given by Sandage (1981), also for RR Lyrae stars. These same variables exhibit a distinct P-L relationship which is contrary to the interpretation of their being foreground RR Lyrae stars, but their radial velocities strongly indicate nonmembership in the LMC. Galactocentric velocities and distances are calculated for these five RR Lyrae stars and a mass of 2.6-2.9 x 10 to the 11th solar masses is found for the Galaxy.
No associations
LandOfFree
The RR Lyrae stars in the direction of the Large Magellanic Cloud does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The RR Lyrae stars in the direction of the Large Magellanic Cloud, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The RR Lyrae stars in the direction of the Large Magellanic Cloud will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1160341