High-resolution Extinction Map in the Direction of the Bulge Globular Cluster NGC 6440
نویسندگان
چکیده
منابع مشابه
High resolution infrared spectra of NGC 6440 and NGC 6441 : ⋆ two massive Bulge Globular Clusters
Using the NIRSPEC spectrograph at Keck II, we have obtained infrared echelle spectra covering the 1.5 − 1.8 μm range for giant stars in the massive bulge globular clusters NGC 6440 and NGC 6441. We report the first high dispersion abundance for NGC 6440, [Fe/H]=−0.56±0.02 and we find [Fe/H]=−0.50±0.02 for the blue HB cluster NGC 6441. We measure an average α-enhancement of ≈ +0.3 dex in both cl...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2019
ISSN: 1538-4357
DOI: 10.3847/1538-4357/ab35db