Search Publications
A catalogue of symbiotic stars
Ivison, R. J.; Munari, U.; Friedjung, M. +2 more
We present a new catalogue of symbiotic stars. In our list we include 188 symbiotic stars as well as 30 objects suspected of being symbiotic. For each star, we present basic observational material: coordinates, V and K magnitudes, ultraviolet (UV), infrared (IR), X-ray and radio observations. We also list the spectral type of the cool component, t…
X-ray photoionized plasma diagnostics with helium-like ions. Application to warm absorber-emitter in active galactic nuclei
Porquet, D.; Dubau, J.
We present He-like line ratios (resonance, intercombination and forbidden lines) for totally and partially photoionized media. For solar plasmas, these line ratios are already widely used for density and temperature diagnostics of coronal (collisional) plasmas. In the case of totally and partially photoionized plasmas, He-like line ratios allow fo…
Chemical composition of 90 F and G disk dwarfs
Zhao, G.; Nissen, P. E.; Chen, Y. Q. +2 more
High resolution, high S/N spectra have been obtained for a sample of 90 F and G main-sequence disk stars covering the metallicity range -1.0 < [Fe/H] < +0.1, and have been analysed in a parallel way to the work of Edvardsson et al. (\cite{Edvardsson93a}) in order to re-inspect their results and to reveal new information on the chemical evolu…
Catalogue of the 1997 SOHO-EIT coronal transient waves and associated type II radio burst spectra
Thompson, B. J.; Mann, G.; Aurass, H. +1 more
We compare the coronal transient wave phenomenon discovered by SOHO extreme ultraviolet observations (``EIT waves'') with the associated radio signature of a coronal shock wave (type II burst). 90% of the type II bursts are associated with an EIT wave. On average, the speed derived from the radio burst is about three times larger than the EIT wave…
The Vienna-KPNO search for Doppler-imaging candidate stars. I. A catalog of stellar-activity indicators for 1058 late-type Hipparcos stars
Weber, M.; Granzer, Th.; Washuettl, A. +2 more
We present the results from a spectroscopic Ca ii H&K survey of 1058 late-type stars selected from a color-limited subsample of the Hipparcos catalog. Out of these 1058 stars, 371 stars were found to show significant H&K emission, most of them previously unknown; 23% with strong emission, 36% with moderate emission, and 41% with weak emiss…
Absolute proper motions of open clusters. I. Observational data
Wielen, R.; Dettbarn, C.; Baumgardt, H.
Mean proper motions and parallaxes of 205 open clusters were determined from their member stars found in the Hipparcos Catalogue. 360 clusters were searched for possible members, excluding nearby clusters with distances D < 200 pc. Members were selected using ground based information (photometry, radial velocity, proper motion, distance from th…
Re-processing the Hipparcos Transit Data and Intermediate Astrometric Data of spectroscopic binaries. I. Ba, CH and Tc-poor S stars
Jorissen, A.; Pourbaix, D.
Only 235 entries were processed as astrometric binaries with orbits in the Hipparcos and Tycho Catalogue (\cite{Hipparcos}). However, the Intermediate Astrometric Data (IAD) and Transit Data (TD) made available by ESA make it possible to re-process the stars that turned out to be spectroscopic binaries after the completion of the Catalogue. This p…
Transient correction of the LW-ISOCAM data for low contrasted illumination
Abergel, A.; Coulais, A.
The detector of the Long Wavelength channel of the ISOCAM camera on-board the Infrared Space Observatory (ISO) presents systematic memory effects of the response which can bias the photometry by a factor as high as 40%. We show that, for uniform illumination, the non linear model developed by \cite[Fouks and Schubert (1995)]{fou95} for the detecto…
ROSAT HRI catalogue of X-ray sources in the SMC region
Pietsch, W.; Haberl, F.; Sasaki, M.
During the operational phase of the ROSAT satellite between 1990 and 1998 the X-ray telescope pointed 71 times to the Small Magellanic Cloud (SMC) for observations with the High Resolution Imager (HRI), covering a field of 5 degr x 5 degr. From these data a catalogue of 121 discrete X-ray sources was derived. By cross-correlating the source catalo…
ROSAT HRI catalogue of X-ray sources in the LMC region
Pietsch, W.; Haberl, F.; Sasaki, M.
All 543 pointed observations of the ROSAT High Resolution Imager (HRI) with exposure times higher than 50 s and performed between 1990 and 1998 in a field of 10°\ x 10°\ covering the Large Magellanic Cloud (LMC) were analyzed. A catalogue was produced containing 397 X-ray sources with their properties measured by the HRI. The list was cross-correl…