Spin-Cycle Eclipse Mapping of the 71 s Oscillations in DQ Herculis: Reprocessing Sites and the True White Dwarf Spin Period

Details Spin-Cycle Eclipse Mapping of the 71 s Oscillations in DQ Herculis: Reprocessing Sites and the True White Dwarf Spin Period Spin-Cycle Eclipse Mapping of the 71 s Oscillations in DQ Herculis: Reprocessing Sites and the True White Dwarf Spin Period

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...693l..16s&link_type=abstract

The Astrophysical Journal Letters, Volume 693, Issue 1, pp. L16-L18 (2009).

Astronomy and Astrophysics

Astronomy

5

Accretion, Accretion Disks, Novae, Cataclysmic Variables, Stars: Individual: Dq Her, Stars: Oscillations: Including Pulsations

Scientific paper

We report an eclipse-mapping analysis of the 71 s pulsation of DQ Her in the He II λ4686 line. The observed pulse phase-dependent illumination pattern can be explained in terms of an asymmetric oblique dipole accretor model, in which X-ray beams from the accretion poles are reprocessed in two arched accretion curtains and in a vertically extended bright spot (BS) of half-thickness H = (7.4 ± 0.4) × 10-3 R sun at the disk rim. The optical pulsation is dominated by reprocessing at the BS, indicating that the 71 s pulsation is the beat period between the white dwarf (WD) spin (P spin = 70.8 s) and the orbital period. Our results exclude the possibility that the rotation period of the WD is 142 s.

Affiliated with

Also associated with

No associations

Rating

Spin-Cycle Eclipse Mapping of the 71 s Oscillations in DQ Herculis: Reprocessing Sites and the True White Dwarf Spin Period does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spin-Cycle Eclipse Mapping of the 71 s Oscillations in DQ Herculis: Reprocessing Sites and the True White Dwarf Spin Period, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin-Cycle Eclipse Mapping of the 71 s Oscillations in DQ Herculis: Reprocessing Sites and the True White Dwarf Spin Period will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1399623