Search Publications
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 …
Analyzing low signal-to-noise FUSE spectra. Confirmation of Lyman continuum escape from Haro 11
Piskunov, N.; Leitet, E.; Bergvall, N. +1 more
Context. Galaxies are believed to be the main providers of Lyman continuum (LyC) photons during the early phases of the cosmic reionization. Little is known however, when it comes to escape fractions and the mechanisms behind the leakage. To learn more, one may look at local objects, but so far only one low-z galaxy has shown any signs of emitting…
Sub-arcsecond [Fe ii] spectro-imaging of the DG Tauri jet. Periodic bubbles and a dusty disk wind?
Dougados, C.; Cabrit, S.; Agra-Amboage, V. +1 more
Context. The origin of protostellar jets as well as their impact on the regulation of angular momentum and the inner disk physics are still crucial open questions in star formation.
Aims: We aim to test the different proposed ejection processes in T Tauri stars through high-angular resolution observations of forbidden-line emission from the i…
The X-ray luminous galaxy cluster XMMU J1007.4+1237 at z = 1.56. The dawn of starburst activity in cluster cores
Böhringer, H.; Pratt, G. W.; Rosati, P. +12 more
Context. Observational galaxy cluster studies at z > 1.5 probe the formation of the first massive M > 1014 M⊙ dark matter halos, the early thermal history of the hot ICM, and the emergence of the red-sequence population of quenched early-type galaxies.
Aims: We present first results for the newly discovered X-ray l…
The outburst and nature of two young eruptive stars in the North America/Pelican Nebula Complex
Pál, A.; Ábrahám, P.; Kóspál, Á. +8 more
Context. The sudden optical brightening of two young stellar objects, HBC 722 and VSX J205126.1+440523, located in the North America/Pelican Nebula Complex, was announced in August 2010. Early photometric and spectroscopic observations of these objects indicated that they may belong to the FUor or EXor class of young eruptive stars. The eruptions …