The deepXMM-NewtonSurvey of M 31
نویسندگان
چکیده
منابع مشابه
Observations of M 31
As part of the Chandra GTO program we are monitoring and surveying M31 using the HRC and ACIS cameras. These observations have resolved the nuclear X-ray source into five separate sources, one of which is very soft and may (or may not!) be associated with the central super-massive black hole. In addition, the superb spatial resolution and low scattering of the Chandra telescope allows us to una...
متن کاملOn the Mass of M 31
Recent work by several groups has established the properties of the dwarf satellites to M31. We reexamine the reported kinematics of this group employing a fresh technique we have developed previously. By calculating the distribution of a χ statistic (which we define in the paper) for the M31 system, we conclude that the total mass (disk plus halo) of the primary is unlikely to be as great as t...
متن کاملThe outermost cluster of M 31 ⋆
We report on the identification of a new cluster in the far halo of the M31 galaxy. The cluster, named Bologna 514 (B514) has an integrated magnitude M V = −8.5 ± 0.6, and a radial velocity, as estimated from two independent low-resolution spectra, V r = −456 ± 23 km/s, which fully confirms its membership to the M31 system. The observed integrated spectrum is very similar to those of classical ...
متن کاملThe satellite distribution of M 31
The spatial distribution of the Galactic satellite system plays an important role in Galactic dynamics and cosmology, where its successful reproduction is a key test of simulations of galaxy halo formation. Here, we examine its representative nature by conducting an analysis of the 3-dimensional spatial distribution of the M31 subgroup of galaxies, the next closest system to our own. We begin b...
متن کاملXMM - Newton survey of M 31 ⋆ , ⋆ ⋆
In an analysis of XMM-Newton archival observations of the bright Local Group spiral galaxy M 31 we study the population of X-ray sources (X-ray binaries, supernova remnants) down to a 0.2–4.5 keV luminosity of 4.4×10 34 erg s −1. EPIC hardness ratios and optical and radio information are used to distinguish between different source classes. The survey detects in an area of 1.24 square degree 85...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2011
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201015270