Search Publications
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…
BR1202-0725: an extreme multiple merger at z = 4.7
Omont, A.; Gavazzi, R.; Salomé, P. +5 more
The radio-quiet quasar BR1202-0725 (z = 4.695) is a remarkable source with a bright northwest (NW) companion detected at submillimeter and radio wavelengths but invisible in the optical. In the absence of amplification by gravitational lensing, BR1202-0725 would be the most luminous binary CO and far-infrared (far-IR) source in the Universe. In th…
Transiting exoplanets from the CoRoT space mission. XX. CoRoT-20b: A very high density, high eccentricity transiting giant planet
Mazeh, T.; Aigrain, S.; Alonso, R. +43 more
We report the discovery by the CoRoT space mission of a new giant planet, CoRoT-20b. The planet has a mass of 4.24 ± 0.23 MJup and a radius of 0.84 ± 0.04 RJup. With a mean density of 8.87 ± 1.10 g cm-3, it is among the most compact planets known so far. Evolutionary models for the planet suggest a mass of heavy el…