RX J0806.3-1527: Ten Years of Phase Coherent Monitoring in the Optical and X-ray Bands

Details RX J0806.3-1527: Ten Years of Phase Coherent Monitoring in the Optical and X-ray Bands RX J0806.3-1527: Ten Years of Phase Coherent Monitoring in the Optical and X-ray Bands

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..797..307i&link_type=abstract

INTERACTING BINARIES: Accretion, Evolution, and Outcomes. AIP Conference Proceedings, Volume 797, pp. 307-312 (2005).

Astronomy and Astrophysics

Astronomy

White Dwarfs, Cataclysmic Binary Stars, X-Ray Binary Stars, Astronomical Telescopes, X-Ray Sources (Astronomical), Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae, Spectroscopic Binaries, Close Binaries, Cataclysmic Binaries, Symbiotic Stars, X-Ray Binaries, X-Ray

Scientific paper

RX J0806.3-1527 is thought to be a 321s orbital period (the shortest known) double white dwarf binary system. According to the double degenerate binary (DDB) scenario this source is expected to be one of the strongest Gravitational Wave (GW) emitter candidates. In the last years RX J0806.3-1527 has been studied in great details, through multiwavelength observational campaigns. We present here the timing results obtained thanks to a 3.5-year long optical monitoring campaign carried out by the Very Large Telescope (VLT) and the Telescopio Nazionale Galileo (TNG) which allowed us to unambiguously detect and study the orbital period derivative (spin-up at a rate of ~10-3s yr-1) of the 321s modulation based on phase coherent techniques, to detect the linear polarisation (at a level of about 2%), and to study the broad band energy spectrum. The VLT/TNG observational strategy we used allowed us, for the first time, to infer a P-Ṗ coherent solution for the archival X-ray observations over a 9.5 years baseline.

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