Science Archives Publication System

Temperatures of coronae of cool stars, derived from EXOSAT observations

DOI: 10.1016/0273-1177(90)90131-I Bibcode: 1990AdSpR..10b.129M

Mewe, R.; Schrijver, C. J.; Lemen, J. R.

We observed the late-type stars Capella, σ² CrB, λ And, AD Leo, GL494, GL569 and Procyon with different combinations of three instruments aboard EXOSAT : the low-energy channel multiplier array (LE), the medium-energy proportional counters (ME), and the transmission grating spectrometer (TGS). We derive crude temperature information on …

1990 • Advances in Space Research

Exosat 1

EXOSAT Observations of the Suspected Flare Star BD +48 degrees 1958A

DOI: 10.1086/169487 Bibcode: 1990ApJ...365..332R

Singh, K. P.; Rao, A. R.; Vahia, M. N.

X-ray observations are reported for the BY Dra variable BD + 48 deg 1958A using the low-energy (LE) and the medium-energy (ME) detectors of Exosat. The star is detected in both the LE and the ME detectors, with some evidence for a long-duration (over 2-hr) X-ray flare. A combined spectral fit to the LE and ME data leads to an X-ray plasma temperat…

1990 • The Astrophysical Journal

Exosat 0

Utilization of the Archive Data from EXOSAT

Bibcode: 1990PrA.....8..172H

Hang, H. R.; Zang, Z. Y.; Han, H. Y.

1990 • Progress in Astronomy

Exosat 0

A Comparison of the Near Ultraviolet Continuum and Chromospheric Emission Line Fluxes of the Late Type Giant Stars

DOI: 10.1007/BF00658828 Bibcode: 1990Ap&SS.164..263A

Avcioglu, Kamuran; Ozkan, M. Turker; Mentese, H. Huseyin

We investigate the near-ultraviolet high-resolution LWR spectra of the stars α Cas, β And, α Tau, β Gem, γ Cru, α Boo, and β Peg, obtained with the aid of the International Ultraviolet Explorer Satellite. We have given here a list of the strongest and most prevalent emission lines in the near-ultraviolet spectra of α Boo, KlIIIp, and β Peg, M2.5II…

1990 • Astrophysics and Space Science

IUE 0

Observations of Energetic Water Group Ions E(H₂O) > 60 KeV Near the Magnetic Pile-Up Region of Comet Halley Obtained Onboard the Giotto Spacecraft on 13/14 March 1986

Bibcode: 1990ICRC....5..352K

Wenzel, K. -P.; Kirsch, E.; O'Sullivan, D. +4 more

1990 • 21st International Cosmic Ray Conference (ICRC21)

Giotto 0

Theory of Radiatively Driven Winds of Hot Stars: II. Some Aspects of Radiative Transfer.

DOI: 10.1007/978-3-642-76238-3_11 Bibcode: 1990RvMA....3..140P

Pauldrach, A. W. A.; Puls, J.

1990 • Reviews in Modern Astronomy

IUE 0

The relative positions and proper motions of components for 32 triple stars from HIPPARCOS input catalogue.

Bibcode: 1990KFNT....6....8A

Orlov, V. V.; Anosova, Zh. P.; Todua, M. M.

A statistical study of the astrometric data for 32 triple stars has been carried out in the frame of the program of the International working group "Double and Multiple Stars HIPPARCOS". The relative positions and proper motions of the components have been made more accurate, uncertainties of their determinations have been analysed.

1990 • Kinematika i Fizika Nebesnykh Tel

Hipparcos 0

Analyses of Wolf-Rayet Stars.

DOI: 10.1007/978-3-642-76238-3_13 Bibcode: 1990RvMA....3..174H

Schmutz, W.; Hamann, W. -R.; Koesterke, L. +5 more

1990 • Reviews in Modern Astronomy

IUE 0

Current ideas about the production of the electroglow of Uranus

DOI: 10.1016/0273-1177(90)90095-H Bibcode: 1990AdSpR..10a.121C

Clarke, J. T.

A process known as ``electroglow'' was identified by Broadfoot et al. /1/ shortly after the Voyager Uranus encounter as soft charged particle excitation of atmospheric gas in the presence of sunlight and in excess of the available photoelectron energy. Localized aurora and diffuse H and H₂ band emissions have been observed from Uranus, …

1990 • Advances in Space Research

IUE 0

Gamma rays and interstellar gas in the Cepheus region: A new gamma-ray source?

DOI: 10.1016/0273-1177(90)90122-G Bibcode: 1990AdSpR..10b..81G

Grenier, I. A.; Lebrun, F.

A recent CO survey of the Cepheus Flare region (100°<=1<=141°, 8°<=b<=22°) has allowed a detailed study of the diffuse gamma-ray emission and the gas content of this nearby region. The comparison of the HI and CO observations with the COS-B gamma-ray data yields estimates of the N(H₂)/WCO ratio in this molecular complex and …

1990 • Advances in Space Research

COS-B 0