Search Publications
Spectral analysis of the sdO K 648 , the exciting star of the planetary nebula Ps 1 in the globular cluster M 15 (NGC 7078 )
Rauch, T.; Werner, K.; Heber, U.
We present a spectral analysis of the sdO central star
Abundant molecular gas in the intergalactic medium of Stephan's Quintet
Duc, P. -A.; Braine, J.; Charmandaris, V. +3 more
Stephan's Quintet (SQ) is a system consisting of at least four interacting galaxies which is well known for its complex dynamical and star formation history. It possesses a rich intergalactic medium (IGM), where hydrogen clouds, both atomic and molecular, associated with two starbursts (refered to as SQ A and B) have been found. In order to study …
Study of the Per OB2 star forming complex. II. Structure and kinematics
Scholz, R. -D.; Piskunov, A. E.; Kharchenko, N. V. +2 more
The study of a sky area with a 20 degree diameter centered on the nearby association Per OB2 has been carried out on the basis of the ``Compiled Catalogue of Astronomical Data in the Per OB2 Field'' presented in a previous paper. The catalogue contains about 30 000 stars with accurate proper motions in the Hipparcos system as well as magnitudes su…
A photoionization model of the compact H II region G29.96-0.02
Morisset, C.; Schaerer, D.; Cox, P. +5 more
We present a detailed photoionization model of G29.96-0.02 (hereafter G29.96), one of the brightest Galactic Ultra Compact H Ii (UCHII) regions in the Galaxy. This source has been observed extensively at radio and infrared wavelengths. The most recent data include a complete ISO (SWS and LWS) spectrum, which displays a remarkable richness in atomi…
Non-radial pulsation, rotation and outburst in the Be star omega Orionis from the MuSiCoS 1998 campaign
Stahl, O.; Kaper, L.; Smartt, S. J. +26 more
Young massive stars in the ISOGAL survey. II. The catalogue of bright YSO candidates
Felli, M.; Omont, A.; Testi, L. +1 more
The 7 and 15 mu m observations of selected fields in the Galactic Plane obtained with ISOCAM during the ISOGAL program offer a unique possibility to search for previously unknown YSOs, undetected by IRAS because of lower sensitivity or confusion problems. In a previous paper (Felli et al. \cite{FCTOS00}) we established criteria of general validity…
Effects of the heliospheric interface on the interplanetary Lyman alpha glow seen at 1 AU from the Sun
Izmodenov, V.; Quémerais, E.
This work presents multiple scattering computations of interplanetary background line profiles using Angle Dependent Partial Frequency Redistribution to model the scattering process as explained by Quémerais (\cite{Quemerais00}). The density and velocity distribution of hydrogen atoms in the heliosphere was computed using a self-consistent model o…
Solar differential rotation determined by tracing coronal bright points in SOHO-EIT images. II. Results for 1998/99 obtained with interactive and automatic methods
Vršnak, B.; Wöhl, H.; Clette, F. +3 more
Full-disc solar images obtained with the Extreme Ultraviolet Imaging Telescope (EIT) on board the Solar and Heliospheric Observatory (SOHO) were used to analyse solar differential rotation by tracing coronal bright points. The results obtained with the interactive and the automatic method for the time period June 4, 1998 to May 22, 1999 are presen…
On the anomaly of Balmer line profiles of A-type stars. Fundamental binary systems
Smalley, B.; Bessell, M. S.; Kupka, F. +1 more
In previous work, Gardiner et al. (\cite{GKS99}) found evidence for a discrepancy between the Teff obtained from Balmer lines with that from photometry and fundamental values for A-type stars. An investigation into this anomaly is presented using Balmer line profiles of stars in binary system with fundamental values of both Teff
An atlas of 2.4 to 4.1 mu m ISO/SWS spectra of early-type stars
Waters, L. B. F. M.; Kaper, L.; Hony, S. +5 more
We present an atlas of spectra of O- and B-type stars, obtained with the Short Wavelength Spectrometer (SWS) during the Post-Helium program of the Infrared Space Observatory (ISO). This program is aimed at extending the Morgan & Keenan classification scheme into the near-infrared. Later type stars will be discussed in a separate publication. T…