Search Publications
The XMM Cluster Outskirts Project (X-COP): Physical conditions of Abell 2142 up to the virial radius
Hurier, G.; Pointecouteau, E.; Rossetti, M. +9 more
Context. Galaxy clusters are continuously growing through the accretion of matter in their outskirts. This process induces inhomogeneities in the gas density distribution (clumping) that need to be taken into account to recover the physical properties of the intracluster medium (ICM) at large radii.
Aims: We studied the thermodynamic properti…
A new model for the X-ray continuum of the magnetized accreting pulsars
Ferrigno, Carlo; Becker, Peter A.; Bozzo, Enrico +1 more
Context. Accreting highly magnetized pulsars in binary systems are among the brightest X-ray emitters in our Galaxy. Although a number of high-quality broad-band (0.1-100 keV) X-ray observations are available, the spectral energy distribution of these sources is usually investigated by adopting pure phenomenological models rather than models linke…
A textbook example of ram-pressure stripping in the Hydra A/A780 cluster
Rossetti, M.; Molendi, S.; De Grandi, S. +7 more
In the current epoch, one of the main mechanisms driving the growth of galaxy clusters is the continuous accretion of group-scale halos. In this process, the ram pressure applied by the hot intracluster medium on the gas content of the infalling group is responsible for stripping the gas from its dark-matter halo, which gradually leads to the viri…
GK Persei and EX Hydrae: Intermediate polars with small magnetospheres
Werner, K.; Ducci, L.; Doroshenko, V. +2 more
Observed hard X-ray spectra of intermediate polars are determined mainly by the accretion flow velocity at the white dwarf surface, which is normally close to the free-fall velocity. This allows us to estimate the white dwarf masses as the white dwarf mass-radius relation M - R and the expected free-fall velocities at the surface are well known. T…
X-ray analysis of the galaxy group UGC 03957 beyond R200 with Suzaku
Thölken, Sophia; Reiprich, Thomas H.; Lovisari, Lorenzo +1 more
Context. In the last few years, the outskirts of galaxy clusters have been studied in detail and the analyses have brought up interesting results such as indications of possible gas clumping and the breakdown of hydrostatic, thermal, and ionization equilibrium. These phenomena affect the entropy profiles of clusters, which often show deviations fr…
Suzaku and XMM-Newton observations of the North Polar Spur: Charge exchange or ISM absorption?
Gu, Liyi; Kaastra, Jelle; Mao, Junjie +1 more
By revisiting the Suzaku and XMM-Newton data of the North Polar Spur, we discovered that the spectra are inconsistent with the traditional model consisting of pure thermal emission and neutral absorption. The most prominent discrepancies are the enhanced O vii and Ne ix forbidden-to-resonance ratios, and a high O viii Lyβ line relative to other Ly…
Activity from the Be/X-ray binary system V0332+53 during its intermediate-luminosity outburst in 2008
Garrido, R.; Özbey Arabacı, M.; Camero-Arranz, A. +7 more
Aims: We present a study of the Be/X-ray binary system V 0332+53 with the main goal of characterizing its behaviour mainly during the intermediate-luminosity X-ray event in 2008. In addition, we aim to contribute to the understanding of the behaviour of the donor companion by including optical data from our dedicated campaign starting in 2006…
Suzaku and XMM-Newton observations of the newly discovered early-stage cluster merger of 1E2216.0-0401 and 1E2215.7-0404
Urdampilleta, I.; Kaastra, J. S.; Mernier, F. +6 more
We present the results of Suzaku and XMM-Newton X-ray observations of the cluster pair
Glancing through the accretion column of EXO 2030+375
Klochkov, Dmitry; Ferrigno, Carlo; Zdziarski, Andrzej A. +3 more
Context. The current generation of X-ray instruments progressively reveals more and more details about the complex magnetic field topology and the geometry of the accretion flows in highly magnetized accretion-powered pulsars.
Aims: We took advantage of the large collecting area and good timing capabilities of the EPIC cameras onboard XMM-New…
RT Crucis: a look into the X-ray emission of a peculiar symbiotic star
Santangelo, A.; Ducci, L.; Ferrigno, C. +3 more
Symbiotic stars are a heterogeneous class of interacting binaries. Among them, RT Cru has been classified as prototype of a subclass that is characterised by hard X-ray spectra that extend past ~20 keV. We analyse ~8.6 Ms of archival INTEGRAL data collected during the period 2003-2014, ~ 140 ks of Swift/XRT data, and a Suzaku observation of 39 ks,…