Search Publications
XMM-Newton observations of the X-ray soft polar QS Telescopii
Burwitz, V.; Dreizler, S.; Walter, F. M. +4 more
Context. On the basis of XMM-Newton observations, we investigate the energy balance of selected magnetic cataclysmic variables, which have shown an extreme soft-to-hard X-ray flux ratio in the ROSAT All-Sky Survey.
Aims: We intend to establish the X-ray properties of the system components, their flux contributions, and the accretion geometry …
STIS optical spectroscopy of the lobes of CRL 618
Velázquez, P. F.; Raga, A. C.; Riera, A. +2 more
Context. Many proto-planetary nebulae show collimated structures sometimes showing multiple outflows.
Aims: We present the results of new optical spectroscopic observations (both medium (with a dispersion of 0.56 Å pixel-1) and low (2.73 and 4.92 Å pixel-1 for the G430L and G750L gratings) spectral resolution) of the lob…
Stellar properties of z ~ 1 Lyman-break galaxies from ACS slitless grism spectra
Walsh, J. R.; Rosati, P.; Kümmel, M. +5 more
Lyman-break galaxies are now regularly found in the high redshift Universe by searching for the break in the galaxy spectrum caused by the Lyman-limit redshifted into the optical or even near-IR. At lower redshift, this break is covered by the GALEX UV channels and small samples of z ~ 1 LBGs have been presented in the literature. Here we give res…
Feasibility and performances of compressed sensing and sparse map-making with Herschel/PACS data
Sauvage, M.; Starck, J. -L.; Chanial, P. +2 more
The Herschel Space Observatory of ESA was launched in May 2009 and has been in operation ever since. From its distant orbit around L2, it needs to transmit a huge quantity of information through a very limited bandwidth. This is especially true for the PACS imaging camera, which needs to compress its data far more than what can be achieved with lo…
The mid-infrared extinction in molecular clouds. Case study of B 335
Olofsson, G.; Olofsson, S.
Aims: The purpose of the present investigation is to probe the dust properties inside a molecular cloud, in particular how particle growth and the presence of ice coatings may change the overall shape of the extinction curve.
Methods: Field stars behind a molecular cloud can be used to probe the cloud extinction for both the reddening an…
Highly absorbed X-ray binaries in the Small Magellanic Cloud
Pietsch, W.; Haberl, F.; Tiengo, A. +12 more
Many of the high mass X-ray binaries (HMXRBs) discovered in recent years in our Galaxy are characterized by a high absorption, most likely intrinsic to the system, that can impede their detection at the softest X-ray energies. Exploiting the good coverage obtained with sensitive XMM-Newton observations, we have undertaken a search for highly absor…
The rotation of Mimas
Noyelles, B.; Rambaux, N.; Karatekin, Ö.
Context. The Cassini mission in the Saturnian system is an outstanding opportunity to improve our knowledge of the satellites of Saturn. The data obtained thanks to this mission must be balanced with theoretical models.
Aims: This paper aims at modelling the rotation of Mimas with respect to its possible internal structure.
Methods: We f…
Diagnostics of electron beam properties from the simultaneous hard X-ray and microwave emission in the 2001 March 10 flare
Zharkova, V. V.; Kuznetsov, A. A.; Kashapova, L. K. +2 more
Context. Microwave (MW) and hard X-ray (HXR) data are thought to be powerful means of investigating the mechanisms of particle acceleration and precipitation in solar flares, reflecting different aspects of electron interaction with ambient particles in the presence of a magnetic field. Simultaneous simulation of HXR and MW emission with the same …
About the relative importance of compressional heating and current dissipation for the formation of coronal X-ray bright points
Otto, A.; Büchner, J.; Santos, J. C. +1 more
Context. The solar corona is heated to high temperatures of the order of 106 K. The coronal energy budget and specifically possible mechanisms of coronal heating (wave, DC-electric fields, etc.) are poorly understood. This is particularly true for the formation of X-ray bright points (BPs) is concerned.
Aims: We aim to investigate …
Large-amplitude photometric variability of the candidate protoplanet TMR-1C
Martín, E. L.; Riaz, B.
Context. TMR-1C is a candidate protoplanet that lies at a separation of about 10” (~1000 AU) from the Class I protobinary TMR-1 (IRAS 04361+2547) located in the Taurus molecular cloud. A narrow filament-like structure was observed in the discovery HST/NICMOS images, extending southeast from the central proto-binary system towards TMR-1C, suggestin…