Search Publications
Spatially resolved XMM-Newton analysis and a model of the nonthermal emission of MSH 15-52
de Jager, O. C.; Büsching, I.; Eger, P. +2 more
We present an X-ray analysis and a model of the nonthermal emission of the pulsar wind nebula (PWN) MSH 15-52. We analyzed XMM-Newton data to obtain the spatially resolved spectral parameters around the pulsar PSR B1509-58. A steepening of the fitted power-law spectra and decrease in the surface brightness is observed with increasing distance from…
Interstellar extinction and the distribution of stellar populations in the direction of the ultra-deep Chandra Galactic field
Revnivtsev, M.; van den Berg, M.; Grindlay, J. E. +3 more
We studied the stellar population in the central 6.6´ × 6.6´ region of the ultra-deep (1Msec) Chandra Galactic field - the “Chandra bulge field” (CBF) approximately 1.5 degrees away from the Galactic Center - using the Hubble Space Telescope ACS/WFC blue (F435W) and red (F625W) images. We mainly focus on the behavior of red clump giants - a distin…
Correlated optical and X-ray variability in CTTS. Indications of absorption-modulated emission
Micela, G.; Favata, F.; Flaccomio, E. +1 more
Aims: Optical and X-ray emission from classical T Tauri stars (CTTSs) has long been known to be highly variable. Our long, uninterrupted optical observation of the NGC 2264 region with CoRoT [The CoRoT space mission was developed and is operated by the French space agency CNES, with participation of ESA's RSSD and Science Programs, Austria, B…
Herschel FIR counterparts of selected Lyα emitters at z ~ 2.2. Fast evolution since z ~ 3 or missed obscured AGNs?
Berta, S.; Magnelli, B.; Nordon, R. +58 more
Lyα emitters (LAEs) are seen everywhere in the redshift domain from local to z ~ 7. Far-infrared (FIR) counterparts of LAEs at different epochs could provide direct clues on dust content, extinction, and spectral energy distribution (SED) for these galaxies. We search for FIR counterparts of LAEs that are optically detected in the GOODS-North fiel…
XMM-Newton detection of the supernova remnant G304.6+0.1 (Kes 17)
Combi, J. A.; Luque-Escamilla, P. L.; Romero, G. E. +6 more
Aims: We report the first detailed X-ray study of the supernova remnant (SNR) G304.6+0.1, achieved with the XMM-Newton mission.
Methods: The powerful imaging capability of XMM-Newton was used to study the X-ray characteristics of the remnant at different energy ranges. The X-ray morphology and spectral properties were analyzed. In additt…
General relativistic models of the X-ray spectral variability of MCG-6-30-15
Niedźwiecki, A.; Miyakawa, T.
Context. The extremely relativistic Fe lines, detected from some active galactic nuclei (AGN), indicate that generation and reprocessing of the X-ray emission takes place in the immediate vicinity of the event horizon. Recently, general relativistic (GR) effects, in particular light bending which is very strong in that region, have been considered…
Detection of unidentified infrared bands in a Hα filament in the dwarf galaxy NGC 1569 with AKARI
Onaka, T.; Sakon, I.; Kaneda, H. +1 more
Context. We report the detection of unidentified infrared (UIR) bands in a filamentary structure associated with Hα emission in the starburst dwarf galaxy NGC 1569 based on imaging and spectroscopic observations of the AKARI satellite.
Aims: We investigate the processing and destruction of the UIR band carriers in an outflow from NGC 1569.
Solar wind effects on Jupiter non-Io DAM emissions during Ulysses distant encounter (2003-2004)
Zarka, P.; Denis, L.; Echer, E. +2 more
Aims: We analyze solar wind data from the Ulysses spacecraft during the distant Jupiter encounter from 2003 November to 2004 March as well as Nançay decametric (DAM) radio observations non-controlled by Io.
Methods: The Ulysses solar wind data are balistically propagated towards Jupiter and are correlated with Nançay non-Io DAM emissions…
Inhomogeneities on the surface of 21 Lutetia, the asteroid target of the Rosetta mission. Ground-based results before the Rosetta fly-by
Barbieri, C.; Barucci, M. A.; Fornasier, S. +6 more
Context. In July 2010 the ESA spacecraft Rosetta will fly by the main belt asteroid 21 Lutetia. Several observations of this asteroid have been performed so far, but its surface composition and nature are still a matter of debate. For a long time Lutetia was supposed to have a metallic nature due to its high IRAS albedo. Later on it has been sugge…
An algorithm for correcting CoRoT raw light curves
Schmitt, J. H. M. M.; Pätzold, M.; Guenther, E. W. +2 more
We introduce the CoRoT detrend algorithm (CDA) for detrending CoRoT stellar light curves. The algorithm CDA has the capability to remove random jumps and systematic trends encountered in typical CoRoT data in a fully automatic fashion. Since enormous jumps in flux can destroy the information content of a light curve, such an algorithm is essential…