Age and Metallicity of a Globular Cluster in the Dwarf Spheroidal Galaxy DDO 78

Авторы: Sharina M.E., Silchenko O.K., Burenkov A.N.
Сборник: Extragalactic Globular Cluster Systems
Серия: ESO ASTROPHYSICS SYMPOSIA
Год издания: 2003
Место издания: SPRINGER BERLIN HEIDELBERG TIERGARTENSTRASSE 17, HEIDELBERG, GERMANY,D-69121
Первая страница: 230
Последняя страница: 233
DOI: 10.1007/10857603_36
Аннотация: We present the results of moderate resolution spectroscopy for a globular cluster in the M81 group dwarf spheroidal galaxy DDO 78. The DDO 78 globular cluster, 4 Milky Way globular clusters, spectroscopic and radial velocity standards were observed with the Long-slit spectrograph of the 6-m telescope (SAO RAS, Russia). We have derived the mean metallicity of the globular cluster in DDO78 to be [Fe/H] = -1.6± 0.1 dex by taking the weighted mean of metallicities obtained from the strength of several absorption features. We have estimated an age for the globular cluster of 9-12 Gyr similar to that found for the Galactic globular cluster NGC 362, which resembles the DDO 78 cluster in its chemical abundance and integrated spectrophotometric properties.
Добавил в систему: Сильченко Ольга Касьяновна

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