Search Publications
The XMM-Newton view of the eclipse and dips of the dwarf nova Z Chamaleontis
Kuulkers, E.; Nucita, A. A.; Ingrosso, G. +3 more
Context. A cataclysmic variable contains a white dwarf that accretes material from a secondary star via the Roche lobe mechanism. Systems with high line-of-sight inclination angles offer the possibility to pinpoint the location of the X-ray emitting region by characterizing the observed eclipse by the secondary star.
Aims: We present an XMM-N…
Interstellar H2 toward HD 37903
Gnaciński, P.
We present an analysis of interstellar H2 toward
Discovery of X-ray flaring activity in the Arches cluster
Czesla, S.; Cappelluti, N.; Capelli, R. +4 more
Context. We present a study of the Arches cluster based on XMM-Newton observations performed over the past 8 years. Unexpectedly, we find that the X-ray emission associated with the cluster experienced a marked brightening in March/April 2007.
Aims: We investigate the origin of both the X-ray continuum emission emanating from the star cluster…
Far-infrared constraints on the contamination by dust-obscured galaxies of high-z dropout searches
Smail, I.; Kneib, J. -P.; Magnelli, B. +23 more
The spectral energy distributions (SED) of dusty galaxies at intermediate redshift may look similar to very high-redshift galaxies in the optical/near infrared (NIR) domain. This can lead to the contamination of high-redshift galaxy searches based on broad-band optical/NIR photometry by lower redshift dusty galaxies because both kind of galaxies c…
Probing the unified model in NGC 7314
Kaastra, J. S.; Costantini, E.; Ebrero, J. +2 more
Aims: We aim at studying the complex absorbed X-ray spectrum of the Narrow Line Seyfert 1 galaxy NGC 7314.
Methods: We collected available public X-ray data from the archives of XMM-Newton, Suzaku, and ASCA. The spectra were analyzed using the fitting package SPEX.
Results: We find evidence of intrinsic neutral and ionized absorptio…
Magnetic helicity balance during a filament eruption that occurred in active region NOAA 9682
Poedts, S.; Romano, P.; Zuccarello, F. P. +1 more
Context. Photospheric shear plasma flows in active regions may be responsible for the magnetic helicity injection in the solar corona not only during the energy storage process before a solar eruption, but also during and after the release of the free magnetic energy caused by the eruption. Indeed, after a filament eruption or expansion the magnet…
4U 1909+07: a well-hidden pearl
Wilms, J.; Pottschmidt, K.; Fürst, F. +4 more
We present the first detailed spectral and timing analysis of the high mass X-ray binary (HMXB) 4U 1909+07 with INTEGRAL and RXTE. 4U 1909+07 is detected in the ISGRI 20-40 keV energy band with an average countrate of 2.6 cts s-1. The pulse period of ~604 s is not stable, but changing erratically on timescales of years. The pulse profil…
The XMM-Newton survey of the Small Magellanic Cloud: discovery of the 11.866 s Be/X-ray binary pulsar XMMU J004814.0-732204(SXP11.87)
Pietsch, W.; Haberl, F.; Hatzidimitriou, D. +12 more
Aims: One of the goals of the XMM-Newton survey of the Small Magellanic Cloud is to study the Be/X-ray binary population. During one of our first survey observations, a bright new transient - XMMU J004814.0-732204 - was discovered.
Methods: We present the analysis of the EPIC X-ray data, together with optical observations, to investigate…
Internal dynamics of the galaxy cluster Abell 545. The ideal case where to study the simultaneous formation of a galaxy system and its brightest galaxy
Rossetti, M.; Eckert, D.; Boschin, W. +3 more
Context. The mechanisms giving rise to diffuse radio emission in galaxy clusters, and in particular their connection with cluster mergers, are still debated.
Aims: We seek to explore the internal dynamics of the cluster Abell 545, which has been shown to host a radio halo. Abell 545 is also peculiar for hosting in its center a very bright, re…
The various contributions in Venus rotation rate and LOD
Souchay, J.; Lebonnois, S.; Rambaux, N. +1 more
Context. Thanks to the Venus Express Mission, new data on the properties of Venus could be obtained, in particular concerning its rotation.
Aims: In view of these upcoming results, the purpose of this paper is to determine and compare the major physical processes influencing the rotation of Venus and, more particularly, the angular rotation r…