A SPECTROSCOPIC ANALYSIS OF THE GALACTIC GLOBULAR CLUSTER NGC 6273 (M19)
نویسندگان
چکیده
منابع مشابه
Observations of Galactic Globular Cluster Cores . II . NGC 6273 and the Problem of Horizontal - Branch Gaps
We present observations of the center of the Galactic globular cluster NGC 6273, obtained with the HST/WFPC2 camera as part of the snapshot program GO-7470. A B, V color–magnitude diagram (CMD) for ∼28,000 stars is presented and discussed. The most prominent feature of the CMD, identified for the first time in this paper, is the extended horizontal branch blue tail (EBT) with a clear double-pea...
متن کاملHalo Surrounding the Galactic Globular Ngc 1851
Using imaging that shows four magnitudes of main sequence stars, we have discovered that the Galactic globular cluster NGC 1851 is surrounded by a halo that is visible from the tidal radius of 700 arcsec (41 pc) to more than 4500 arcsec (>250 pc). This halo is symmetric and falls in density as a power law of r. It contains approximately 0.1% of the dynamical mass of NGC 1851. There is no eviden...
متن کاملPhotometry of the Globular Cluster NGC 4833 and Extinction Near the Galactic Plane
CCD Photometry of the Globular Cluster NGC 4833 and Extinction Near the Galactic Plane. Jason Melbourne and Ata Sarajedini Astronomy Department, Wesleyan University, Middletown, CT 06459 [email protected] and [email protected] Andrew Layden Dept. of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403 [email protected] Donald H. Martins1 1Observations ob...
متن کاملDestruction of the Galactic Globular Cluster System
We investigate the dynamical evolution of the Galactic Globular Cluster System in considerably greater detail than has been done hitherto, finding that destruction rates are significantly larger than given by previous estimates. The general scheme (but not the detailed implementation) follows Aguilar, Hut, & Ostriker (1988; AHO). For the evolution of individual clusters we use a Fokker-Planck c...
متن کاملEvolution of the Galactic Globular Cluster System
We study the dynamical evolution of disk and halo globular clusters in the Milky Way using a series of Fokker-Planck calculations combined with parametric statistical models. Our sample of 113 clusters with velocity data is predicted to descend from an initial population of 250 clusters, implying more than a factor of two decrease in population size due to evolution. Approximately 200 of these ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2015
ISSN: 1538-3881
DOI: 10.1088/0004-6256/150/2/63