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" X-Ray Astronomy in the Exosat Era : "
edited by A. Peacock.
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BL
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773534
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b593528
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| Main Entry
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edited by A. Peacock.
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X-Ray Astronomy in the Exosat Era : : Proceedings of the XVIII ESLAB Sysmposium, held in The Hague, the Netherlands, 5-9 November 1984\ edited by A. Peacock.
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| Publication Statement
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Dordrecht : Springer Netherlands, 1985
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| ISBN
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9400954484
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: 940108906X
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: 9789400954489
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: 9789401089067
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| Contents
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I / Galactic X-Ray Astronomy --; Section I: Stellar Coronae and Isolated White Dwarfs --; Section II: Cataclysmic Variables --; Section III: X-Ray Binary Sources --; Low Mass/High Mass Systems --; Section IV: Supernova Remnants and the Interstellar Medium --; II / Extragalactic X-Ray Astronomy --; Section V: Active Galactic Nuclei --; Section VI: Clusters of Galaxies --; Section VII: Other Extragalactic Topics --; III --; Section VIII: Instrumentation/General Interest --; Index of Names --; Index of Subjects.
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| Abstract
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Algol is a triple system containing a 70 hr eclipsing binary (K IV and B8 V) in a 694 day orbit with an A V star. The X-ray emission from this system (Schnopper et al 1976) is thought to be associated with a corona surrounding the lobe filling and synchron ously rotating K IV star. This is based on the similarity of the X-ray spectrum and luminosity of this system to that of the RS CVn binaries which also contain K sub-giants with similar rotation periods and the fact that the luminosity of any coronae surrounding the B8 V and AV companion stars should not be enhanced by rapid rotation (Pallavicini et al 1980, White et al 1980). The Einstein SSS measurement showed the X-ray spectrum to be two component with 6 7 temperatures of 7. 10 K and 3. 10 K (White et al. 1980). As dis cussed by Swank et al. (1981), the problem in understanding stellar coronae in general is how to scale up the solar model to account for the enhanced luminosities. The close to 900 inclination and similar sizes for the Band K stars of 3. 6 and 3. 8 R0 respectively make Algol an ideal candidate for an X-ray eclipse measurement wherein the size of the X-ray emitting coronal structures can be directly measured. In this paper we report a continuous observation through the secondary eclipse of Algol using the EXOSAT Observatory. 2.
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Physics.
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| LC Classification
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QB4.E358 1985
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| Added Entry
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A Peacock
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