X-ray And Far-ultraviolet Line Emission Of The Intermediate Polar Ex Hya

Details X-ray And Far-ultraviolet Line Emission Of The Intermediate Polar Ex Hya X-ray And Far-ultraviolet Line Emission Of The Intermediate Polar Ex Hya

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...21116203b&link_type=abstract

American Astronomical Society, AAS Meeting #211, #162.03

Astronomy and Astrophysics

Astronomy

Scientific paper

This paper presents simultaneous X-ray and far ultraviolet (FUV) observations of the Intermediate Polar EX Hya. The exposure times were 59.9 and 27.5 ks, respectively. The phase-resolved spectra show orbital variations in the X-ray and FUV emission lines of C, N, O, Mg, Si, and Fe. In X-rays, the O VIII, Mg XII, and Si XIV fluences have a maximum at phase 0.3, while the triplet G ratios of O, Mg, and Si remain relatively constant. The Fe XVII 15.26/15.01 ratio shows a drop at phase 0.7. This phase coincides with the UV dip at orbital phase 0.8. The dip is likely caused by a large increase in the optical depth where the accretion stream impacts the disk. The ISM column densities of atomic and molecular H are 5E-16 and 1E-13 cm-2, respectively.

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