ChandraX‐Ray Sources in the Collapsed‐Core Globular Cluster M30 (NGC 7099)

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Chandra X-ray Sources in the Collapsed-core Globular Cluster M30 (ngc 7099)

We report the detection of six discrete, low-luminosity (LX < 1033 erg s−1) X-ray sources, located within 12 of the center of the collapsed-core globular cluster M30 (NGC 7099), and a total of 13 sources within the half-mass radius, from a 50 ksec Chandra ACIS-S exposure. Three sources lie within the very small upper limit of 1.9 on the core radius. The brightest of the three core sources has a...

متن کامل

Globular Cluster Photometry with the Hubble Space Telescope. Vii. Color Gradients and Blue Stragglers in the Central Region of M30 (ngc 7099) from Wfpc2 Observations

We present F555W (V ), F439W (B), and F336W (U) photometry of 9507 stars in the central 2 of the dense, post core collapse cluster M30 (NGC 7099) derived from Hubble Space Telescope Wide Field/Planetary Camera 2 images. These data are used to study the mix of stellar populations in the central region of the cluster. Forty eight blue straggler stars are identified; they are found to be strongly ...

متن کامل

Globular Cluster Metallicity Subpopulations in NGC 4472

Bimodality is a common feature of globular cluster (GC) color distributions in galaxies. Although it is well known that the GC system of the Milky Way is bimodal in metallicity, this has yet to be directly demonstrated for an elliptical galaxy. We use Lick index measurements from the literature to derive metallicities for 47 GCs in the giant Virgo elliptical galaxy NGC 4472. The resulting distr...

متن کامل

Globular Cluster Candidates in NGC 891 1

We use deep images taken with the Advanced Camera for Surveys on board the Hubble Space Telescope of the disk galaxy NGC 891, to search for globular cluster candidates. This galaxy has long been considered to be a close analog in size and structure to the Milky Way and is nearly edge-on, facilitating studies of its halo population. These extraplanar ACS images, originally intended to study the ...

متن کامل

Using globular clusters to test gravity in the weak acceleration regime : NGC 7099 ⋆

Aims. A test of Newton's law of gravity in the low acceleration regime using globular clusters is presented and new results for the core collapsed globular cluster NGC 7099 given. Methods. The run of the gravitational potential as a function of distance is probed by studying the velocity dispersion profile of the cluster, as derived from a set of 125 radial velocities with accuracy better than ...

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

ژورنال

عنوان ژورنال: The Astrophysical Journal

سال: 2007

ISSN: 0004-637X,1538-4357

DOI: 10.1086/507572