DISCOVERY OF MIRA VARIABLE STARS IN THE METAL-POOR SEXTANS DWARF SPHEROIDAL GALAXY
نویسندگان
چکیده
منابع مشابه
Chemical composition of extremely metal-poor stars in the Sextans dwarf spheroidal galaxy
Context. Individual stars in dwarf spheroidal galaxies around the Milky Way Galaxy have been studied both photometrically and spectroscopically. Extremely metal-poor stars among them are very valuable because they should record the early enrichment in the Local Group. However, our understanding of these stars is very limited because detailed chemical abundance measurements are needed from high ...
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The light curves of the high–amplitude, short– period variable stars discovered by Mateo et al. (1998) in the Carina dwarf Spheroidal Galaxy were re-analyzed to refine their properties and compare them with those of galactic stars. In spite of a different pulsation mode established by means of different PLM relationships, the Fourier parameters did not reveal a separation between the two groups...
متن کاملVariable Stars in the Fornax Dwarf Galaxy
We have surveyed a 40' X 40' field. We have obtained 20 epochs with the MACHO camera (filters VyiRu) on the 1.3-m telescope (Mt Stromlo) and 15 VI epochs on the 1-m telescope at Siding Spring, over a time interval of five months. To look for variables, we used the method proposed by Welch & Stetson (1993). The variability index Jws is plotted in Fig. 1. Non-variable stars cluster around 0. The ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2012
ISSN: 2041-8205,2041-8213
DOI: 10.1088/2041-8205/761/1/l10