Probing the Boundary Layer and Wind of U GEM in Outburst

Details Probing the Boundary Layer and Wind of U GEM in Outburst Probing the Boundary Layer and Wind of U GEM in Outburst

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1159l&link_type=abstract

Chandra Proposal ID #04300626

Physics

Chandra Proposal Id #04300626

Scientific paper

EUVE observations have identified the dwarf nova U Geminorum as the first (and so far only) example of a disk-accreting white dwarf system with a "classical" boundary layer. As such, it provides a unique opportunity for exploring the physics of the accretion disk-central object interaction. We propose to exploit this opportunity with a 50 ksec HRC-S/LETG observation of U Gem in outburst in order to obtain high quality, phase resolved spectra. The observations will allow us to accurately characterize the optically-thick boundary layer emission and to probe the structure and kinematics of the extended material, whether wind or accretion stream, surrounding the boundary layer and disk, and will lead to solid understanding of the nature of the disk-white dwarf interaction.

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