Period–magnitude relations for M giants in Baade’s Window NGC 6522
نویسندگان
چکیده
A large and complete sample of stars with K < 9.75 in the NGC 6522 Baade’s Window towards the Galactic bulge is examined using light curves extracted from MACHO and IJK photometry
منابع مشابه
M giants in MACHO , DENIS and ISOGAL
A ‘complete’ sample of 174 M giants classified by Blanco (1986) and later than subtype M0 in the NGC 6522 Baade’s Window clear field has been investigated to establish some general properties of cool Bulge stars. Photometric information has been obtained from the MACHO database to search for variablility and, where possible, to determine periods. Nearand mid-IR magnitudes have been extracted fr...
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Aims. We seek to provide 2MASS and OGLE identifications and coordinates for all stars in the finding chart published by Arp (1965, ApJ, 141, 43). This chart covers the low extinction area around NGC 6522, also known as Baade’s window, at coordinates (l, b) = (1.02,−3.92). Methods. A cross correlation, using numerical techniques, was performed between a scan of the original finding chart from Ar...
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I explore the consequences of making the RR Lyrae and clump giant distance scales consistent in the solar neighborhood, Galactic bulge and Large Magellanic Cloud (LMC). I employ two major assumptions: 1) that the absolute magnitude metallicity, MV (RR) – [Fe/H], relation for RR Lyrae stars is universal, and 2) that absolute I-magnitudes of clump giants, MI(RC), in Baade’s Window can be inferred...
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تاریخ انتشار 2003