Search Publications
An XMM-Newton spatially-resolved study of metal abundance evolution in distant galaxy clusters
Molendi, S.; Gastaldello, F.; Tozzi, P. +3 more
Context. We present an XMM-Newton analysis of the X-ray spectra of 39 clusters of galaxies at 0.4 < z < 1.4, covering a temperature range of 1.5 ≲ kT ≲ 11 keV.
Aims: The main goal of this paper is to study how the abundance evolves with redshift not only by means of a single emission measurement performed on the whole cluster but also b…
Basal magnetic flux and the local solar dynamo
Stenflo, J. O.
The average unsigned magnetic flux density in magnetograms of the quiet Sun is generally dominated by instrumental noise. Due to the entirely different scaling behavior of the noise and the solar magnetic pattern it has been possible to determine the standard deviation of the Gaussian noise distribution and remove the noise contribution from the a…
Improved distance determination to M 51 from supernovae 2011dh and 2005cs
Garnavich, P. M.; Wheeler, J. C.; Pál, A. +9 more
Aims: The appearance of two recent supernovae, SN 2011dh and 2005cs, both in M 51, provides an opportunity to derive an improved distance to their host galaxy by combining the observations of both SNe.
Methods: We apply the Expanding Photosphere Method to get the distance to M 51 by fitting the data of these two SNe simultaneously. In or…
HD 172555: detection of 63 µm [OI] emission in a debris disc
Pinte, C.; Ménard, F.; Duchêne, G. +14 more
Context.
The XMM-BCS galaxy cluster survey. I. The X-ray selected cluster catalog from the initial 6 deg2
Finoguenov, A.; Böhringer, H.; Pratt, G. W. +19 more
The XMM-Newton-Blanco Cosmology Survey project (XMM-BCS) is a coordinated X-ray, optical and mid-infrared cluster survey in a field also covered by Sunyaev-Zel'dovich effect (SZE) surveys by the South Pole Telescope and the Atacama Cosmology Telescope. The aim of the project is to study the cluster population in a 14 deg2 field (center:…
AGN-host galaxy connection: morphology and colours of X-ray selected AGN at z ≤ 2
Castañeda, H.; Cepa, J.; Bongiovanni, A. +11 more
Context. The connection between active galactic nuclei (AGN) and their host galaxies has been widely studied and found to be of great importance for providing answers to some fundamental questions related to AGN fuelling mechanisms, and both their formation and evolution.
Aims: Using X-ray data and one of the deepest broad-band optical data s…
Three-dimensional interferometric, spectrometric, and planetary views of Procyon
Matter, A.; Lopez, B.; Kervella, P. +5 more
Context. Procyon is one of the brightest stars in the sky and one of our nearest neighbours. It is therefore an ideal benchmark object for stellar astrophysics studies using interferometric, spectroscopic, and asteroseismic techniques.
Aims: We use a new realistic three-dimensional (3D) radiative-hydrodynamical (RHD) model atmosphere of Procy…
Herschel/PACS observations of young sources in Taurus: the far-infrared counterpart of optical jets
Pinte, C.; Dent, W. R. F.; Kamp, I. +8 more
Context. Observations of the atomic and molecular line emission associated with jets and outflows emitted by young stellar objects provide sensitive diagnostics of the excitation conditions, and can be used to trace the various evolutionary stages they pass through as they evolve to become main sequence stars.
Aims: To understand the relevanc…
The metal-enriched host of an energetic γ-ray burst at z ≈ 1.6
Geier, S.; Milvang-Jensen, B.; Fynbo, J. P. U. +7 more
Context. The star-forming nature of long γ-ray burst (GRB) host galaxies provides invaluable constraints on the progenitors of GRBs and might open a short-cut to the characteristics of typical star-forming galaxies throughout the history of the Universe. Due to the absence of near-infrared (NIR) spectroscopy, however, detailed investigations, spec…
Tracking down R Coronae Borealis stars from their mid-infrared WISE colours
Tisserand, P.
Context. R Coronae Borealis stars (RCBs) are hydrogen-deficient and carbon-rich supergiant stars. They are very rare, with only ~50 actually known in our Galaxy. Interestingly, RCBs are strongly suspected of being the evolved merger product of two white dwarfs and could therefore be an important tool for understanding supernovae type Ia in the dou…