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Stream Eclipse Mapping with ‘Fire-Flies’

Published online by Cambridge University Press:  12 April 2016

C. M. Bridge ,
Pasi Hakala ,
Mark Cropper  and
Gavin Ramsay
C. M. Bridge
Affiliation:
Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT
Pasi Hakala
Affiliation:
Observatory, University of Helsinki, Finland
Mark Cropper
Affiliation:
Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT
Gavin Ramsay
Affiliation:
Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT

Abstract

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We apply a new method of eclipse mapping to the light curves of eclipsing polars. The technique aims to locate the bright emission associated with the accretion stream, using a technique that makes the fewest prior assumptions about the location of the accretion stream material. We have obtained data of EP Dra and HU Aqr with the S-Cam 2 superconducting tunnel junction camera using the William Herschel Telescope. The location of emission regions in both systems show that previously assumed trajectories are consistent with those found using our technique. Most of the emission is located in a region where we expect material to be confined to magnetic field lines, particularly for HU Aqr, while there appears to be a lack of emission from where we conventionally expect material to follow a ballistic trajectory from the L1 point.

Type
Part 5. Accretion Streams
Information
International Astronomical Union Colloquium , Volume 190: Magnetic Cataclysmic Variables , 2004 , pp. 258 - 264
Copyright
Copyright © Astronomical Society of the Pacific 2004

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