文章基本信息

标题：Temperatures and metallicities of M giants in the Galactic bulge from low-resolution
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作者：M. Schultheis ; M. Schultheis ; N. Ryde 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2016
卷号：590
页码：1-6
DOI：10.1051/0004-6361/201628266
语种：English
出版社：EDP Sciences
摘要：Context. With the existing and upcoming large multifibre low-resolution spectrographs, the question arises of how precise stellar parameters such as Teff and [Fe/H] can be obtained from low-resolution K-band spectra with respect to traditional photometric temperature measurements. Until now, most of the effective temperatures in Galactic bulge studies come directly from photometric techniques. Uncertainties in interstellar reddening and in the assumed extinction law could lead to large systematic errors (>200 K). Aims. We obtain and calibrate the relation between Teff and the 12CO first overtone bands for M giants in the Galactic bulge covering a wide range in metallicity. Methods. We used low-resolution spectra for 20 M giants with well-studied parameters from photometric measurements covering the temperature range 3200
关键词：stars: fundamental parameters;stars: late-type;Galaxy: bulge;infrared: stars