The optical gravitational lensing experiment. Variable stars in globular clusters
نویسندگان
چکیده
منابع مشابه
The Optical Gravitational Lensing Experiment . Variable stars in globular clusters - IV . Fields 104 A - E in 47 Tuc ⋆
Five fields located close to the center of the globular cluster NGC 104=47 Tuc were surveyed in a search for variable stars. We present V -band light curves for 42 variables. This sample includes 13 RR Lyr stars – 12 of them belong to the Small Magellanic Cloud (SMC) and 1 is a background object from the galactic halo. Twelve eclipsing binaries were identified – 9 contact systems and 3 detached...
متن کاملOptical Gravitational Lensing Experiment . Variable Stars in Star Clusters of the Magellanic
The list of 127 eclipsing stars in optical coincidence with star clusters from the SMC is presented. It was prepared using the catalogs of eclipsing systems and star clusters from the SMC based on observations collected during the OGLE-II microlensing project. Location of 12 eclipsing stars in the color-magnitude diagram of clusters allows to exclude their membership. Photometric data of 73 sys...
متن کاملThe Optical Gravitational Lensing Experiment. Cepheids in Star Clusters from the Magellanic Clouds
We present Cepheids located in the close neighborhood of star clusters from the Mag-ellanic Clouds. 204 and 132 such stars were found in the LMC and SMC, respectively. The lists of objects were constructed based on catalogs of Cepheids and star clusters, recently published by the OGLE-II collaboration. Location of selected Cepheids on the sky indicates that many of them are very likely cluster ...
متن کاملThe Optical Gravitational Lensing Experiment. Population Effects on the Mean Brightness of the Red Clump Stars
We present an empirical test indicating that the mean I-band magnitude of the red clump stars, used as the standard candle in the recent distance determinations to the Magellanic Clouds and other objects, is age independent for intermediate age (2−10 Gyr) stars. Fifteen star clusters of age ≈ 1. were observed and their color-magnitude diagrams are presented. The mean I-band brightness of the re...
متن کاملThe Optical Gravitational Lensing Experiment . Population Effects on the Mean Brightness of the Red Clump Stars
We present an empirical test indicating that the mean I-band magnitude of the red clump stars, used as the standard candle in the recent distance determinations to the Magellanic Clouds and other objects, is age independent for intermediate age (2−10 Gyr) stars. Fifteen star clusters of age ≈ 1. were observed and their color-magnitude diagrams are presented. The mean I-band brightness of the re...
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics Supplement Series
سال: 1997
ISSN: 0365-0138,1286-4846
DOI: 10.1051/aas:1997376