ar X iv : a st ro - p h / 98 08 06 7 v 1 7 A ug 1 99 8 OSSERVATORIO ASTRONOMICO di PADOVA
نویسنده
چکیده
The photometric estimate of the metallicity and the age of the Azzopardi et al. (1991) carbon stars (Ng 1997) is revised to respectively Z≃0.004 and ∼0.1 Gyr. Under the hypothesis that the carbon stars are located at a distance related to the Sagittarius dwarf galaxy, the broad velocity dispersion of the stars can only be explained if they were formed out of Galactic material during a recent crossing of the Sagittarius dwarf galaxy through the Galactic plane.
منابع مشابه
ar X iv : a st ro - p h / 02 03 41 7 v 1 2 3 M ar 2 00 2 Clustering at high redshift
1 ST European Coordinating Facility, European Southern Observatory, K.-Schwarzschild-Strasse 2, D-85748 Garching bei Muenchen, Germany 2 Osservatorio Astronomico di Trieste, via Tiepolo 11, I-34131 Trieste, Italy 3 European Southern Observatory, K.-Schwarzschild-Strasse 2, D-85748 Garching bei Muenchen, Germany 4 Osservatorio Astronomico di Roma, via dell’Osservatorio 2, Monteporzio, Italy 5 Os...
متن کاملar X iv : a st ro - p h / 06 11 22 8 v 1 7 N ov 2 00 6 How large is the population of heavily obscured X - ray sources ?
INAF/Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna, Via Gobetti 101, 40129 Bologna, Italy Dipartimento di Fisica, Università di Ferrara, Via Saragat, 1, 44100 Ferrara, Italy INAF/Osservatorio Astronomico di Bologna, Via Ranzani, 1, 40127 Bologna, Italy INAF/Osservatorio Astronomico di Roma, 00040 Monte Porzio Catone, Italy Dipartimento di Astronomia, Università di Bologna, Via Ranz...
متن کاملar X iv : a st ro - p h / 98 08 21 9 v 1 2 0 A ug 1 99 8 Sgr A ∗ : A supermassive black hole or a spatially extended object ?
متن کامل
ذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1998