Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Sakelliou, Irini"'
We present Chandra and radio observations, and analysis of Sloan Digital Sky Survey data, of the radio galaxy B2 0838+32A (4C 32.26) and its environment. The radio galaxy is at the centre of a nearby group that has often been identified with the clus
Externí odkaz:
http://arxiv.org/abs/0809.2534
Publikováno v:
Mon.Not.Roy.Astron.Soc.368:609-618,2006
We present a sample of 30 wide angle tailed radio galaxies (WATs) that we use to constrain the jet speeds in these sources. We measure the distribution of jet-sidedness ratios for the sample, and assuming that the jets are beamed, jet speeds in the r
Externí odkaz:
http://arxiv.org/abs/astro-ph/0602162
Autor:
Sakelliou, Irini, Ponman, Trevor J.
Publikováno v:
Mon.Not.Roy.Astron.Soc. 367 (2006) 1409-1416
It has been known that Abell 2255 is not a relaxed cluster, but it is undergoing a merger. Here, we report on the analysis of the XMM-Newton observations of this cluster. The X-ray data give us the opportunity to reveal the complexity of the cluster,
Externí odkaz:
http://arxiv.org/abs/astro-ph/0601382
Autor:
Sakelliou, Irini, Ponman, Trevor J.
Publikováno v:
Mon.Not.Roy.Astron.Soc. 351 (2004) 1439
Abell 399 and Abell 401 are both rich clusters of galaxies, at temperatures 7.2keV and 8.5keV respectively. They lie at a projected separation of ~3Mpc, forming a close pair. We have observed the system with the XMM-Newton satellite. The data of each
Externí odkaz:
http://arxiv.org/abs/astro-ph/0403673
Publikováno v:
Mon.Not.Roy.Astron.Soc. 341 (2003) 1333
We present results from a series of hydrodynamic simulations investigating ram pressure stripping of galactic haloes as the host galaxy falls radially into a cluster. We perform a parameter study comprising of variations in initial gas content, gas i
Externí odkaz:
http://arxiv.org/abs/astro-ph/0302322
Publikováno v:
Astron.Astrophys.365:L 267,2001
We report the results of preliminary analysis of the XMM_Newton EPIC and RGS observations of the candidate black-hole binary LMC X-3 between February and June 2000. The observations covered both the soft and the hard X-ray spectral states. The hard-s
Externí odkaz:
http://arxiv.org/abs/astro-ph/0011205
We study the optical counterpart of the black-hole X-ray binary LMC X-3, by using XMM-Newton/OM observations carried out during a low-hard X-ray state. We derive a better constraint for the temperature, mass and radius of the companion star, and we s
Externí odkaz:
http://arxiv.org/abs/astro-ph/0010546
Autor:
Sakelliou, Irini
Publikováno v:
Mon.Not.Roy.Astron.Soc. 318 (2000) 1164
In clusters of galaxies, the reaction of the intracluster medium (ICM) to the motion of the co-existing galaxies in the cluster triggers the formation of unique features, which trace their position and motion. Galactic wakes, for example, are an appa
Externí odkaz:
http://arxiv.org/abs/astro-ph/0007115
`Wakes' of X-ray emission have now been detected trailing behind a few (at least seven) elliptical galaxies in clusters. To quantify how widespread this phenomenon is, and what its nature might be, we have obtained a deep (70 ksec) X-ray image of the
Externí odkaz:
http://arxiv.org/abs/astro-ph/0002017