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HST Spatially Resolved Spectra Of Accretion Discs In CVs

Published online by Cambridge University Press:  12 April 2016

Raymundo Baptista
Raymundo Baptista*
Affiliation:
School of Phys. & Astronomy, University of St. Andrews, Scotland

Abstract

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Time-resolved eclipse spectroscopy of the novalike variable UX UMa obtained with the HST/FOS is analized with eclipse mapping techniques to produce spatially resolved spectra of its accretion disk and gas stream as a function of distance from disk center. The results reveal a noticeable asymmetry in the disk emission, with the disk side closest to the secondary star showing pronounced absorption bands in the UV and a Balmer jump in absorption. The spectrum of the infalling gas stream is noticeably different from the disk spectrum at the same radius suggesting that gas overflows through the impact point at disk rim and continues along the stream trajectory, producing distinct emission down to 0.1 RL1.

Type
Part 10. Accretion Disks and Outflows
Information
International Astronomical Union Colloquium , Volume 163: Accretion Phenomena and Related Outflows , 1997 , pp. 453 - 456
Copyright
Copyright © Astronomical Society of the Pacific 1997

References

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