Search Publications
Expansion of magnetic clouds in the outer heliosphere
Rodriguez, L.; Gulisano, A. M.; Démoulin, P. +1 more
Context. A large amount of magnetized plasma is frequently ejected from the Sun as coronal mass ejections (CMEs). Some of these ejections are detected in the solar wind as magnetic clouds (MCs) that have flux rope signatures.
Aims: Magnetic clouds are structures that typically expand in the inner heliosphere. We derive the expansion propertie…
The relationship between γ Cassiopeiae's X-ray emission and its circumstellar environment
Motch, C.; Pollmann, E.; Smith, M. A. +17 more
γ Cas is the prototypical classical Be star and is recently best known for its variable hard X-ray emission. To elucidate the reasons for this emission, we mounted a multiwavelength campaign in 2010 centered around four XMM-Newton observations. The observational techniques included long baseline optical interferometry (LBOI) from two instruments a…
Spin period evolution of GX 1+4
Kretschmar, P.; Kuulkers, E.; Larsson, S. +4 more
Aims: We aim both to complement the existing data on the spin history of the peculiar accreting X-ray pulsar GX 1+4 with more past and current data from BeppoSAX, INTEGRAL, and Fermi and to interpret the evolution in the framework of accretion theory.
Methods: We used source light curves obtained from BeppoSAX/WFC and INTEGRAL/ISGRI to d…
Limb darkening laws for two exoplanet host stars derived from 3D stellar model atmospheres. Comparison with 1D models and HST light curve observations
Pont, F.; Asplund, M.; Sing, D. +1 more
We compare limb darkening laws derived from 3D hydrodynamical model atmospheres and 1D hydrostatic MARCS models for the host stars of two well-studied transiting exoplanet systems, the late-type dwarfs
The massive protostar W43-MM1 as seen by Herschel-HIFI water spectra: high turbulence and accretion luminosity
Braine, J.; Bontemps, S.; van Dishoeck, E. F. +7 more
Aims: We present Herschel-HIFI observations of 14 water lines in W43-MM1, a massive protostellar object in the luminous star-cluster-forming region W43. We place our study in the more general context of high-mass star formation. The dynamics of these regions may be represented by either the monolithic collapse of a turbulent core, or competit…
The hard X-ray emission of X Persei
Santangelo, A.; Doroshenko, V.; Kreykenbohm, I. +1 more
We present an analysis of the spectral properties of the peculiar X-ray pulsar
The AKARI NEP-Deep survey: a mid-infrared source catalogue
Im, M.; Lee, H. M.; White, G. J. +13 more
We present a new catalogue of mid-IR sources using the AKARI NEP-Deep survey. The InfraRed Camera (IRC) onboard AKARI has a comprehensive mid-IR wavelength coverage with 9 photometric bands at 2-24 µm. We utilized all of these bands to cover a nearly circular area adjacent to the north ecliptic pole (NEP). We designed the catalogue to includ…
The SOPHIE search for northern extrasolar planets. IV. Massive companions in the planet-brown dwarf boundary
Bouchy, F.; Moutou, C.; Queloz, D. +20 more
Context. The mass domain where massive extrasolar planets and brown dwarfs lie is still poorly understood. Indeed, not even a clear dividing line between massive planets and brown dwarfs has been established yet. This is partly because these objects are very scarce in close orbits around solar-type stars, the so-called brown dwarf desert. Owing to…
The North Ecliptic Pole Wide survey of AKARI: a near- and mid-infrared source catalog
Im, M.; Lee, H. M.; White, G. J. +19 more
We present a photometric catalog of infrared (IR) sources based on the North Ecliptic Pole Wide field (NEP-Wide) survey of AKARI, which is an infrared space telescope launched by Japan. The NEP-Wide survey covered 5.4 deg2 area, a nearly circular shape centered on the NEP, using nine photometric filter-bands from 2-25 µm of the In…
Spatial variation of the cooling lines in the Orion Bar from Herschel/PACS
Abergel, A.; Bernard, J. -P.; White, G. J. +8 more
Context. The energetics in photo-dissociation regions (PDRs) are mainly regulated by the balance between the heating from the photo-electric effect acting on dust grains, and the cooling via the copious emission of photons in far-infrared lines. The Orion Bar is a luminous and nearby PDR, which presents to the observer an ideal edge-on orientation…