Computer Science
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..924..661d&link_type=abstract
THE MULTICOLORED LANDSCAPE OF COMPACT OBJECTS AND THEIR EXPLOSIVE ORIGINS. AIP Conference Proceedings, Volume 924, pp. 661-666
Computer Science
Spectroscopic Binaries, Close Binaries, X-Ray Binaries, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages
Scientific paper
We report on evolutionary calculations of the onset of mass transfer in AM CVn binaries, treating the donor's evolution in detail. During the early contact phase, while the mass transfer rate, Ṁ, is increasing, gravity wave emission continues to drive the binary to shorter orbital periods, Porb. We show the phase where Ṁ > 0 and ν˙ > 0 (ν = 1/Porb) can last between 103 and 106 yrs, significantly longer than previously estimated. We apply our calculations to RX J0806+1527 (Porb = 321 s) and RX J914+2456 (Porb = 569 s), both of which have measured ν˙ > 0, arguing that a ν˙ > 0 does not select between the unipolar inductor and accretion driven models proposed as the source of X-rays in these systems. For the accretion model, we predict for RX J0806 that ν̈ ~ 1.0 - 1.5 × 10-28 Hz s-2 and argue that timing observations can probe ν̈ at this level with a total ~ 20 yr baseline.
Deloye Christopher . J.
Taam Ronald E.
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