Physics
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...380..116d&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 380, Oct. 10, 1991, p. 116-123.
Physics
21
Galactic Bulge, Horizontal Branch Stars, Metallic Stars, Milky Way Galaxy, Stellar Spectra, Astronomical Photometry, Galactic Evolution, Red Giant Stars, Stellar Physics
Scientific paper
A series of images obtained with a 256 x 256 Hg:Cd:Te array is used to investigate a field in Baade's Window (BW) at near-infrared wavelengths. The data extend down to K is equal to about 16, which is near the base of the red giant branch at the distance of the Galactic bulge. The distribution of data points on the (K, J-K) and (J-H, H-K) diagrams is similar to that defined by previous aperture measurements. The redward edge of the data envelope on the (K, J-K) diagram roughly follow the giant branch of the cluster M67 to K is equal to about 15, indicating that the blanketing agent thought to dominant the broadband photometric properties of super metal-rich stars must be present over a broad range of photospheric temperatures and surface gravities. The data are also used to examine the horizontal branch content of BW. Horizontal branch stars are found over an interval spanning almost two magnitudes in K, with the bluest of these centered near K is equal to about 13.2.
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