Zobrazeno 1 - 10
of 202
pro vyhledávání: '"Femiano R."'
Autor:
Fusco-Femiano, R., Lapi, A.
Publikováno v:
MNRAS 475 (2018), 1340
Clumping and turbulence are expected to affect the matter accreted onto the outskirts of galaxy clusters. To determine their impact on the thermodynamic properties of Abell 2142 we perform an analysis of the X-ray temperature data from XMM-Newton via
Externí odkaz:
http://arxiv.org/abs/1710.08700
Galaxy groups differ from clusters primarily by way of their lower masses, M~10^14 M_sun vs. M~10^15 M_sun. We discuss how mass affects the thermal state of the intracluster or the intragroup medium, specifically as to their entropy levels and radial
Externí odkaz:
http://arxiv.org/abs/1604.06921
Autor:
Fusco-Femiano, R., Lapi, A.
Publikováno v:
Astrophys. J. 800 (2015), 75
We present an analysis of high-quality X-ray data out to the virial radius for the two galaxy clusters Abell 1246 and GMBCG J255.34805+64.23661 (J255) by means of our entropy-based SuperModel. For Abell 1246 we find that the spherically-averaged entr
Externí odkaz:
http://arxiv.org/abs/1412.4511
Autor:
Fusco-Femiano, R., Lapi, A.
Publikováno v:
Astrophys. J. 783 (2014), 76
Several physical processes and formation events are expected in cluster outskirts, a vast region up to now essentially not covered by observations. The recent Suzaku (X-ray) and Planck (Sunayev-Zeldovich effect) observations out to the virial radius
Externí odkaz:
http://arxiv.org/abs/1401.3097
Autor:
Fusco-Femiano, R., Lapi, A.
Publikováno v:
Astrophys. J. 771 (2013), 102
The total mass derived from X-ray emission is biased low in a large number of clusters when compared with the mass estimated via strong and weak lensing. Suzaku and Chandra observations out to the virial radius report in several relaxed clusters stee
Externí odkaz:
http://arxiv.org/abs/1305.3020
Publikováno v:
Astrophys. J. 763 (2013), L3
The Planck collaboration has recently published precise and resolved measurements of the Sunyaev-Zel'dovich effect in Abell 1656 (the Coma cluster of galaxies), so directly gauging the electron pressure profile in the intracluster plasma. On the othe
Externí odkaz:
http://arxiv.org/abs/1212.3082
Publikováno v:
Astrophys. J. 745 (2012), L15
The pressure profiles of the Intracluster Plasma in galaxy clusters show a wide variance when observed in X rays at low redshifts z<0.2. We find the profiles to follow two main patterns, featuring either a steep or a shallow shape throughout both cor
Externí odkaz:
http://arxiv.org/abs/1112.3179
Publikováno v:
Astrophys. J. 742 (2011), 19
We take up from a library of 12 galaxy clusters featuring extended X-ray observations of their Intra Cluster Plasma (ICP), analyzed with our entropy-based Supermodel. Its few intrinsic parameters - basically, the central level and the outer slope of
Externí odkaz:
http://arxiv.org/abs/1110.1951
Publikováno v:
Astronomy and Astrophysics 525 (2011), 110
We submit that non thermalized support for the outer intracluster medium in relaxed galaxy clusters is provided by turbulence, driven by inflows of intergalactic gas across the virial accretion shocks. We expect this component to increase briskly dur
Externí odkaz:
http://arxiv.org/abs/1010.4415
Publikováno v:
Astronomy and Astrophysics 516 (2010), 34
In galaxy clusters the entropy distribution of the IntraCluster Plasma modulates the latter's equilibrium within the Dark Matter gravitational wells, as rendered by our Supermodel. We argue the entropy production at the boundary shocks to be reduced
Externí odkaz:
http://arxiv.org/abs/1004.3749