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4 papers
Using Local Group Galaxies to Investigate the Influence of Blending on Cepheid Distances and the Cosmological Distance Scale
B. J. Mochejska, L. M. Macri, D. D. Sasselov +1
We investigate the influence of blending on the Cepheid distance scale using two Local Group galaxies, M31 and M33. Blending leads to systematically low distances to galaxies obser…
Photometry and Spectroscopy of Eclipsing Binaries in omega Centauri
J. Kaluzny, I. Thompson, W. Krzeminski +3
Detached eclipsing double line spectroscopic binaries are accurate distance indicators. They can be used for the direct determination of distances to globular clusters in which suc…
The DIRECT Project: Influence of Blending on the Cepheid Distance Scale. II. Cepheids in M33
B. J. Mochejska, L. M. Macri, D. D. Sasselov +1
We investigate the influence of blending on the Cepheid distance scale. Blending is the close association of a Cepheid with one or more intrinsically luminous stars. High-resolutio…
Variable stars in the field of the open cluster NGC 7789
B. J. Mochejska, J. Kaluzny
We present the results of our search for variable stars in the intermediate-age open cluster NGC 7789. We have found 45 variable stars: 35 eclipsing binaries, five pulsating variab…