Radial Velocity Study of the New Unresolved DA/DAp Double Degenerate EUVE J1439+75.0

Details Radial Velocity Study of the New Unresolved DA/DAp Double Degenerate EUVE J1439+75.0 Radial Velocity Study of the New Unresolved DA/DAp Double Degenerate EUVE J1439+75.0

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop...65v&link_type=abstract

NOAO Proposal ID #1999A-0065

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Scientific paper

An optical spectrum of the extreme ultraviolet source EUVE J1439+75.0 revealed a new unresolved double degenerate system. The system is composed of two hot white dwarfs (T_eff>=20,000 K), one magnetic (< B> ~10MG) and the other apparently non-magnetic. Surface gravity measurements imply masses of ~1.0 and ~0.9M_&sun; for the magnetic and non-magnetic white dwarfs, respectively. We propose to obtain a series of high-resolution spectra and radial velocity measurements in an attempt to uncover evidence of past interactions and clarify its current status as a potential precursor of a type-Ia supernova.

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