Search Publications
The XMM-Newton extended survey of the Taurus molecular cloud (XEST)
Audard, M.; Güdel, M.; Grosso, N. +18 more
Context: The Taurus Molecular Cloud (TMC) is the nearest large star-forming region, prototypical for the distributed mode of low-mass star formation. Pre-main sequence stars are luminous X-ray sources, probably mostly owing to magnetic energy release.
Aims: The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) presented in this p…
The representative XMM-Newton cluster structure survey (REXCESS) of an X-ray luminosity selected galaxy cluster sample
Zhang, Y. -Y.; Finoguenov, A.; Böhringer, H. +31 more
Context: The largest uncertainty for cosmological studies using clusters of galaxies is introduced by our limited knowledge of the statistics of galaxy cluster structure, and of the scaling relations between observables and cluster mass.
Aims: To improve on this situation we have started an XMM-Newton Large Programme for the in-depth study of …
Temperature profiles of a representative sample of nearby X-ray galaxy clusters
Finoguenov, A.; Böhringer, H.; Arnaud, M. +4 more
Context: A study of the structural and scaling properties of the temperature distribution of the hot, X-ray emitting intra-cluster medium of galaxy clusters, and its dependence on dynamical state, can give insights into the physical processes governing the formation and evolution of structure.
Aims: Accurate temperature measurements are a pre-…
Calibration of the galaxy cluster M{500}-Y{X} relation with XMM-Newton
Arnaud, M.; Pointecouteau, E.; Pratt, G. W.
The quantity Y_X, the product of the X-ray temperature TX and gas mass M_g, has recently been proposed as a robust low-scatter mass indicator for galaxy clusters. Using precise measurements from XMM-Newton data of a sample of 10 relaxed nearby clusters, spanning a YX range of 1013-1015 M_⊙ keV, we invest…
X-ray emission from T Tauri stars and the role of accretion: inferences from the XMM-Newton extended survey of the Taurus molecular cloud
Audard, M.; Güdel, M.; Briggs, K. R. +2 more
Context: T Tau stars display different X-ray properties depending on whether they are accreting (classical T Tau stars; CTTS) or not (weak-line T Tau stars; WTTS). X-ray properties may provide insight into the accretion process between disk and stellar surface.
Aims: We use data from the XMM-Newton Extended Survey of the Taurus molecular cloud…
An alternative hypothesis for the outburst mechanism in supergiant fast X-ray transients: the case of IGR J11215-5952
Götz, D.; Mereghetti, S.; Sidoli, L. +4 more
Context: The physical mechanism responsible for the short outbursts in a recently recognised class of high mass X-ray binaries, the supergiant fast X-ray transients (SFXTs), is still unknown. Two main hypotheses have been proposed to date: the sudden accretion by the compact object of small ejections originating in a clumpy wind from the supergian…
Tracing the evolution in the iron content of the intra-cluster medium
Tozzi, P.; Balestra, I.; Mainieri, V. +5 more
Context: We present a Chandra analysis of the X-ray spectra of 56 clusters of galaxies at z ⪆ 0.3, which cover a temperature range of 3 ⪉ kT ⪉ 15 keV.
Aims: Our analysis is aimed at measuring the iron abundance in the intra-cluster medium (ICM) out to the highest redshift probed to date.
Methods: We made use of combined spectral analysis p…
Constraints on the parameters of radiatively decaying dark matter from the dark matter halos of the Milky Way and Ursa Minor
Nevalainen, J.; Boyarsky, A.; Ruchayskiy, O.
Aims:We improve the earlier restrictions on parameters of the warm dark matter (DM) in the form of a sterile neutrinos.
Methods: The results were obtained from not observing the DM decay line in the X-ray spectrum of the Milky Way (using the recent XMM-Newton PN blank sky data). We also present a similar constraint coming from the recent XMM-N…
Detection of VHE gamma-ray emission from the distant blazar 1ES 1101-232 with HESS and broadband characterisation
Santangelo, A.; Ripken, J.; Carrigan, S. +122 more
Context: The blazar
Aims: VHE observations of blazars are used to investigate…
Constraining supernova models using the hot gas in clusters of galaxies
Kaastra, J. S.; de Plaa, J.; Vink, J. +3 more
Context: The hot X-ray emitting gas in clusters of galaxies is a very large repository of metals produced by supernovae. During the evolution of clusters, billions of supernovae eject their material into this Intra-Cluster Medium (ICM).
Aims: We aim to accurately measure the abundances in the ICM of many clusters and compare these data with me…