Uv Line Profiles of AM HER Stars

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Hst Proposal Id #5160 Stellar Astrophysics Subluminous Stars

Scientific paper

AM Her type binaries contain highly magnetic accreting White Dwarf stars. Emission lines originate in complex columns of accreting material and their profiles change significantly in times of a few minutes as the line of sight geometry alters with binary phase. IUE data reveal that emission lines are present in the UV spectrum but lack the spectral and time resolution to study profile changes. The UV resonance lines arise in different parts of the accretion column from the visible - so will allow new insights into the accretion mechanisms.

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