Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jass...16..115s&link_type=abstract
Journal of Astronomy and Space Sciences, vol. 16, no. 2, p. 115-130.
Astronomy and Astrophysics
Astronomy
Scientific paper
We report the discovery of 17 new RR Lyrae variables in the central region(¥ã¡Â1') of the globular cluster M53. There candidates were identified by using the Welch & Stetson (1993) technique and confirmed by checking individual light curves in both B and V bands. The color-magnitude diagram of the horizontal-branch stars in the central region is compared with that for stars observed in the outer region by Rey et al. (1998). Including the new data from this study, we estimate the fraction of c typeRR Lyrae variables, n(c)/n(ab + c), to be 0.43 which agrees well with the valuse of other Oosterhoff group II clusters.
Byun Yong-Ik.
Chun Mun-Suk
Lee Young-Wook
Rey Soo-Chang
Shon Sangmo
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