a Study of the Classic Boundary Layer in U GEM at Quiescence

Details a Study of the Classic Boundary Layer in U GEM at Quiescence a Study of the Classic Boundary Layer in U GEM at Quiescence

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop...91s&link_type=abstract

Chandra Proposal ID #01300514

Physics

Chandra Proposal Id #01300514

Scientific paper

We will use the HETG to observe the 0.4-10 keV spectrum of the simplest, most straightforward, bright disk system at quiescence (the prototypical dwarf nova U Gem) in order to obtain good diagnostics for the boundary layer plasma as it undergoes transition from an 8 keV low density region to the atmosphere of a 30,000K white dwarf. The use of the Fe lines at 6.4-6.7 keV together with the emission lines in the 0.5-2 keV region will provide information on the correct temperature and density structure, the photoionization/collisional processes and the abundances of the material transferred from the secondary star. In addition, the velocity broadening in the lines will give insight into the rotation and location of the gas.

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