Image-based Classification of Variable Stars: First Results from Optical Gravitational Lensing Experiment Data
نویسندگان
چکیده
منابع مشابه
Optical 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 . 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 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...
متن کاملThe Optical Gravitational Lensing Experiment: Red Clump Stars as a Distance Indicator.
We present relation of the mean I-band brightness of red clump stars on metallicity. Red clump stars were proposed to be a very attractive standard candle for distance determination. The calibration is based on 284 nearby red giant stars whose high-quality spectra made it possible to determine accurate individual metal abundances. High-quality parallaxes (sigmapi&solm0;pi<10%) and photometry of...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2020
ISSN: 2041-8213
DOI: 10.3847/2041-8213/ab9ca4