Search Publications
Multi-frequency study of supernova remnants in the Large Magellanic Cloud. Confirmation of the supernova remnant status of DEM L205
Pietsch, W.; Haberl, F.; Gruendl, R. A. +11 more
Context. The Large Magellanic Cloud (LMC) is an ideal target for the study of an unbiased and complete sample of supernova remnants (SNRs). We started an X-ray survey of the LMC with XMM-Newton, which, in combination with observations at other wavelengths, will allow us to discover and study remnants that are either even fainter or more evolved (o…
The horizontal branch morphology of M 31 globular clusters. Extreme second parameter effect in outer halo clusters
Cacciari, C.; Bellazzini, M.; Galleti, S. +4 more
We use deep, high quality color magnitude diagrams obtained with the Hubble Space Telescope to compute a simplified version of the Mironov index (SMI; B/(B+R)) to parametrize the horizontal branch (HB) morphology for 23 globular clusters in the M 31 galaxy (Sample A), all located in the outer halo at projected distances between 10 kpc and 100 kpc.…
Phase-resolved optical and X-ray spectroscopy of low-mass X-ray binary X1822-371
Hakala, P.; Vilhu, O.; Somero, A. +2 more
Context. X1822-371 is the prototypical accretion disc corona X-ray source, a low-mass X-ray binary viewed at very high inclination, thereby allowing the disc structure and extended disc coronal regions to be visible. As the brightest (closest) such source, X1822-371 is ideal for studying the shape and edge structure of an accretion disc, and compa…
Discovery of the neutron star spin and a possible orbital period from the Be/X-ray binary IGR J05414-6858 in the LMC
Pietsch, W.; Haberl, F.; Greiner, J. +7 more
Context. The number of known Be/X-ray binaries in the Large Magellanic Cloud is small compared to the observed population of the Galaxy or the Small Magellanic Cloud. The discovery of a system in outburst provides the rare opportunity to measure its X-ray properties in detail.
Aims: IGR J05414-6858 was discovered in 2010 with INTEGRAL and was…
On the origin of the jet-like radio/X-ray morphology of G290.1-0.8
Bocchino, F.; Combi, J. A.; García, F. +3 more
Context. The origin and evolution of supernova remnants of the mixed-morphology class is not well understood. Several remnants present distorted radio or X-ray shells with jet-like structures. G290.1-0.8 (
Aims: We aim to investigate the nature of this supernova remnant in order …
Transiting exoplanets from the CoRoT space mission. XXII. CoRoT-16b: a hot Jupiter with a hint of eccentricity around a faint solar-like star
Mazeh, T.; Guterman, P.; Aigrain, S. +53 more
Aims: We report the discovery of CoRoT-16b, a low density hot jupiter that orbits a faint G5V star (mV = 15.63) in 5.3523 ± 0.0002 days with slight eccentricity. A fit of the data with no a priori assumptions on the orbit leads to an eccentricity of 0.33 ± 0.1. We discuss this value and also derive the mass and radius of the planet.
Meth…
Detection of an exoplanet around the evolved K giant HD 66141
Lee, B. -C.; Park, M. -G.; Han, I. +2 more
Aims: We have been carrying out a precise radial velocity (RV) survey for K giants to search for and study the origin of the low-amplitude and long-periodic RV variations.
Methods: We present high-resolution RV measurements of the K2 giant HD 66141 from December 2003 to January 2011 using the fiber-fed Bohyunsan Observatory Echelle Spect…
The Suzaku X-ray spectrum of NGC 3147. Further insights on the best "true" Seyfert 2 galaxy candidate
Bianchi, S.; Guainazzi, M.; Barcons, X. +2 more
Context. NGC 3147 is so far the most convincing case of a "true" Seyfert 2 galaxy, i.e. a source genuinely lacking the broad line regions.
Aims: We obtained a Suzaku observation with the double aim to study in more detail the iron line complex, and to check the Compton-thick hypothesis for the lack of observed optical broad lines.
Method…
High spatial resolution VAULT H-Lyα observations and multiwavelength analysis of an active region filament
Vial, J. -C.; Yurchyshyn, V.; Vourlidas, A. +2 more
Context. The search for the fine structure of prominences has received considerable new attention thanks to the Swedish Solar Telescope (SST) Hα pictures that provide an unsurpassed spatial resolution. Recently, it has been shown that the filaments' coronal environment, at least for quiescent filaments, is perturbed by either cool absorbing materi…
Upper limit for the D2H+ ortho-to-para ratio in the prestellar core 16293E (CHESS)
Codella, C.; Ceccarelli, C.; Lis, D. C. +6 more
The H_3^+ ion plays a key role in the chemistry of dense interstellar gas clouds where stars and planets are forming. The low temperatures and high extinctions of such clouds make direct observations of H_3^+ impossible, but lead to large abundances of H2D+ and D2H+, which are very useful probes of the e…