Search Publications
The complex circumstellar environment of HD 142527
Waters, L. B. F. M.; Pantin, E.; Dominik, C. +10 more
Context. The recent findings of gas giant planets around young A-type stars suggest that disks surrounding Herbig Ae/Be stars will develop planetary systems. An interesting case is HD 142527, for which previous observations revealed a complex circumstellar environment and an unusually high ratio of infrared to stellar luminosity. Its properties di…
Study of LINER sources with broad Hα emission. X-ray properties and comparison to luminous AGN and X-ray binaries
Porquet, D.; Reeves, J. N.; Younes, G. +1 more
Context. An important number of multiwavelength studies of low ionization nuclear emission-line regions (LINERs) were dedicated to investigate the excitation mechanism responsible for the detected emission lines. Radiative emission from accretion into a super massive black hole (SMBH) is now believed to be, in an increasing number of LINERs, the s…
Age and helium content of the open cluster NGC 6791 from multiple eclipsing binary members. I. Measurements, methods, and first results
Grundahl, F.; Bedin, L. R.; Brogaard, K. +4 more
Context. Models of stellar structure and evolution can be constrained by measuring accurate parameters of detached eclipsing binaries in open clusters. Multiple binary stars provide the means to determine helium abundances in these old stellar systems, and in turn, to improve age estimates.
Aims: Earlier measurements of the masses and radii o…
The Herschel view of massive star formation in G035.39-00.33: dense and cold filament of W48 undergoing a mini-starburst
Martin, P. G.; Hill, T.; White, G. J. +29 more
The filament IRDC G035.39-00.33 in the W48 molecular complex is one of the darkest infrared clouds observed by Spitzer. It has been observed by the PACS (70 and 160 µm) and SPIRE (250, 350, and 500 µm) cameras of the Herschel Space Observatory as part of the W48 molecular cloud complex in the framework of the HOBYS key programme. The o…
A single picture for solar coronal outflows and radio noise storms
Aulanier, G.; Klein, K. -L.; Del Zanna, G. +1 more
We propose a unified interpretation for persistent coronal outflows and metric radio noise storms, two phenomena typically observed in association with quiescent solar active regions. Our interpretation is based on multi-wavelength observations of two such regions as they crossed the meridian in May and July 2007. For both regions, we observe a pe…
A new SNR with TeV shell-type morphology: HESS J1731-347
Klochkov, D.; Santangelo, A.; Quirrenbach, A. +194 more
Aims: The recent discovery of the radio shell-type supernova remnant (SNR),
Planck early results. XVI. The Planck view of nearby galaxies
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +192 more
The all-sky coverage of the Planck Early Release Compact Source Catalogue (ERCSC) provides an unsurpassed survey of galaxies at submillimetre (submm) wavelengths, representing a major improvement in the numbers of galaxies detected, as well as the range of far-IR/submm wavelengths over which they have been observed. We here present the first resul…
The X-ray emission of local luminous infrared galaxies
Esquej, P.; Colina, L.; Jiménez-Bailón, E. +6 more
We study the X-ray emission of a representative sample of 27 local luminous infrared galaxies (LIRGs). The median IR luminosity of our sample is log LIR/L⊙ = 11.2, therefore the low-luminosity end of the LIRG class is well represented. We used new XMM-Newton data as well as Chandra and XMM-Newton archive data. The soft X-ray …
The X-ray spectral properties of the AGN population in the XMM-Newton bright serendipitous survey
Page, M. J.; Carrera, F. J.; Caccianiga, A. +5 more
Context. X-ray surveys are a key instrument in the study of active galactic nuclei (AGN). Thanks to their penetrating ability, X-rays are able to map the innermost regions close to the central super massive black hole (SMBH) as well as to detect and characterize its emission up to high redshift.
Aims: We present here a detailed X-ray spectral…
Kinematical evidence for physically different classes of large-scale coronal EUV waves
Mann, G.; Warmuth, A.
Context. Large-scale wavelike disturbances have been observed in the solar corona in the EUV range since more than a decade. The physical nature of these so-called "EIT waves" is still being debated controversially. The two main contenders are on the one hand MHD waves and/or shocks, and on the other hand magnetic reconfiguration in the framework …