Search Publications
LWS spectroscopy of the luminous blue compact galaxy Haro 11
Östlin, G.; Bergvall, N.; Cernicharo, J. +1 more
We present the results of far infrared (FIR) spectroscopy of the luminous blue compact galaxy (BCG)
The Galactic warp in OB stars from Hipparcos
Lattanzi, M. G.; Drimmel, R.; Smart, R. L.
The kinematics of distant OB stars perpendicular to the Galactic plane, inferred from proper motions in the Hipparcos catalogue, are analysed and compared to the kinematic signature that would be induced by a long-lived Galactic warp. Previously we reported that the kinematics of the OB stars toward the anticenter were inconsistent with the assump…
Large [O]/[CO] ratios in cold molecular clouds towards W 49N
Ceccarelli, C.; Caux, E.; Vastel, C. +3 more
We present ISO-LWS high spectral resolution (R ~ 104) observations of the [OI] 63 mu m and 145 mu m lines towards the high mass star formation region W49N. At 145 mu m the observed spectrum shows an emission component only, while at 63 mu m it shows both emission and absorption components. We performed an analysis of the observed spectr…
Mid infrared emission of nearby Herbig Ae/Be stars
Prusti, T.; Siebenmorgen, R.; Müller, T. G. +1 more
We present mid IR spectro-photometric imaging of a sample of eight nearby (D <= 240 pc) Herbig Ae/Be stars. The spectra are dominated by photospheric emission (HR6000), featureless infrared excess emission (T Cha), broad silicate emission feature (HR5999) and the infrared emission bands (HD 97048, HD 97300, TY CrA, HD 176386). The spectrum o…
NLTE spectral analysis of the sdOB primary of the eclipsing binary system LB 3459 (AA Dor)
Rauch, T.
We present a spectral analysis of the sdOB primary star of the binary system
ISO results on bright Main Belt asteroids: PHT-S observations
Barucci, M. A.; Lellouch, E.; Crovisier, J. +8 more
Observations of asteroids have been performed by the ISO satellite with PHT-S. The aim of these observations was to investigate the physical and compositional properties of five bright Main Belt Asteroids (1 Ceres, 2 Pallas, 3 Juno, 4 Vesta, and 52 Europa) in the spectral range 5.8-11.6 mu m. The Standard Thermal Model and a black-body fit have be…
Angle dependent partial frequency redistribution in the interplanetary medium at Lyman alpha
Quémerais, E.
We present here the results of a model of multiple scattering at Lyman alpha in the interplanetary medium. This paper uses the formalism of Angle Dependent Partial Frequency Redistribution which allows a computation of the actual line profile for a hydrogen velocity distribution taking into account actual local velocities and temperatures. This wo…
Outflow velocity of interplume regions at the base of Polar Coronal Holes
Vial, J. -C.; Patsourakos, S.
We report on SUMER/SOHO observations at 1.05 Rsun of a well identified interplume region in a South Pole Coronal Hole. Combination of Doppler shifts and Doppler dimming measurements allowed to determine, for the first time, the total wind outflow velocity (~ 67 km s-1) at this height. Our calculations of the outflow velocity …
Strong spectral variability in NGC 7603 over 20 years
Dietrich, M.; Kollatschny, W.; Bischoff, K.
We present results of a long-term optical variability campaign on the Seyfert 1 galaxy NGC 7603 over a period of nearly 20 years. The optical continuum and the Balmer and Helium lines varied by a factor of 5 to 10 in this broad-line Seyfert 1 galaxy. Furthermore, it is remarkable that the optical FeII line blends varied with the same amplitude as …
The visual double stars observed by the Hipparcos satellite
Nys, O.; Dommanget, J.
This paper is the introduction to the complete and correct list of all systems or individual components known in July 1997 which were observed by the Hipparcos satellite. The list concerns 18644 double or multiple systems and may be found at the CDS under reference I-260. Its format is the same as that used in the CCDM catalogue (Dommanget & N…