Search Publications
The hard X-ray view of bright infrared galaxies
Walter, R.; Cabral, N.
Aims: The synthesis of the cosmic X-ray background (CXB) requires a large population of Compton-thick active galactic nuclei that have not been detected so far. We probe whether bright infrared galaxies could harbor a population of Compton-thick nuclei and if they could contribute significantly.
Methods: We analyzed 112 Ms of INTEGRAL observat…
The new star forming site NGC 6334 IV (MM3)
Roth, M.; Gómez, M.; Persi, P. +1 more
Aims: The eastern part of the massive star forming region NGC 6334 IV is characterized by the presence of the millimeter continuum sources MM3, MM4, and the optically thin HII region G351.24+0.65. Here we study the star formation in this part of the cloud.
Methods: We imaged this region, here named NGC 6334 IV (MM3), at sub-arcsec resolution i…
Stellar populations in a standard ISOGAL field in the Galactic disc
Ganesh, S.; Omont, A.; Schultheis, M. +4 more
Aims: We identify the stellar populations (mostly red giants and young stars) detected in the ISOGAL survey at 7 and 15 µm towards a field (LN45) in the direction ℓ=-45, b=0.0.
Methods: The sources detected in the survey of the Galactic plane by the Infrared Space Observatory were characterised based on colour-colour and colour-magnitude…
Counterpart candidates to the unidentified Fermi source 0FGL J1848.6-0138
Combi, J. A.; Luque-Escamilla, P. L.; Martí, J. +3 more
Aims. We aim to contribute to the identification of the counterpart for one of the bright sources of gamma-rays in the catalogue obtained and released by the Fermi collaboration.
Methods: Our work is based on a extensive identification of sources from different wavelength catalogues and databases.
Results: As a first result, we report the …
The Tycho-2 Catalogue: a reference for astrometry and photometry. Combining the most modern and the oldest astrometric data. Commentary on: Høg E., Fabricius C., Makarov V. V., et al., 2000, A&A, 355, L27
Turon, C.
The core fundamental plane of B2 radio galaxies
Falomo, R.; Fanti, R.; Parma, P. +2 more
Context: The photometric, structural and kinematical properties of the centers of elliptical galaxies harbour important information on the formation history of galaxies. In the case of non-active elliptical galaxies, these properties are linked in a way that surface brightness, break radius and velocity dispersion of the core lie on a fundamental …
HD 51106 and HD 50747: an ellipsoidal binary and a triple system observed with CoRoT
Auvergne, M.; Amado, P. J.; Poretti, E. +13 more
Context: We present an analysis of the observations of HD 51106 and HD 50747 by the satellite CoRoT, obtained during its initial run, and of the spectroscopic preparatory observations.
Aims: We complete an analysis of the light curve, extract the main frequencies observed, and discuss some preliminary interpretations about the stars.
Metho…
Catalogue of ISO LWS observations of asteroids
Müller, T. G.; Hormuth, F.
Context: The long wavelength spectrometer (LWS) onboard the infrared space observatory (ISO) observed the four large main-belt asteroids
Solar wind elemental abundances related to the Sun's open magnetic flux
Wurz, P.; Klecker, B.; Wang, X.
Context: We present an investigation of the effects of solar magnetic field on the elemental abundance ratios of heavy ions in the solar wind.
Aims: We compare the elemental abundance ratios Fe/O, Si/O, Mg/O, Ne/O, and C/O over the 23rd solar cycle, attention being given to the varying fraction of open magnetic flux on the visible side of the …
The solar plasma conditions in the source regions of two explosive events
Wilhelm, K.; Mendoza-Torres, J. E.; Lara, A.
We analyze the ultraviolet emission during two explosive events (EEI and EEII) recorded by SUMER aboard SOHO in the wavelength range from 749 Å to 789 Å. The events occurred near the centre of the solar disk on 17 November 1996. An attempt is made to separate the emission of the primary energy release from that of the accelerated plasma. We want t…