Population effects on the red giant clump absolute magnitude: theKband
نویسندگان
چکیده
منابع مشابه
Population effects on the red giant clump absolute magnitude : The K - band
We present a detailed analysis of the behaviour of the Red Clump K-band absolute magnitude (M K ) in simple and composite stellar populations, in light of its use as standard candle for distance determinations. The advantage of using M K , following recent empirical calibrations of its value for the solar neighbourhood, arises from its very low sensitivity to the extinction by interstellar dust...
متن کاملPopulation effects on the Red Giant Clump absolute magnitude, and distance determinations to nearby galaxies
The red giant clump has been recently argued to be a reliable distance indicator for the galaxies in the Local Group. The accuracy of distance determinations based on this method, however, depend on the possible presence of systematic magnitude differences (∆M I ) between the local clump revealed by the Hipparcos colour-magnitude diagram, and the clump stars observed in distant galaxies. In thi...
متن کاملFine structure of the red giant clump from Hipparcos data, and distance determinations based on its mean magnitude
The I-band brightnessMI of clump stars is a possible distance indicator for stellar populations. Investigations have shown that MI is almost insensitive to the (V − I) colour within the clump. Based on this, it was assumed that MI was insensitive to age and composition of the stellar population and therefore an ideal standard candle, which could be calibrated with local clump stars, whose absol...
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: Monthly Notices of the Royal Astronomical Society
سال: 2002
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.2002.05917.x