NDLI: Phase coherent timing of rx j0806.3+1527 with rosat and chandra

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Phase coherent timing of rx j0806.3+1527 with rosat and chandra

Content Provider	NASA Technical Reports Server (NTRS)
Author	Strohmayer, Tod E.
Copyright Year	2003
Description	RX 50806.3+1527 is an ultra-compact, double degenerate binary with the shortest known orbital period (321.5 s). Hakala et.al., have recently reported new optical measurements of the orbital frequency of the source which indicate that the frequency has increased over the approx.= 9 years since the earliest ROSAT observations. They find two candidate solutions for the long term change in the frequency; nu approx. = 3 or 6 x 10(exp -16)Hz/s. Here we present the results of a phase coherent timing study of the archival ROSAT and Chandra data for RX 50806.3+1527 in the light of these new constraints. We find that the ROSAT - Chandra timing data are consistent with both of the solutions reported by Hakala et al., but that the higher nu = 6.1 x 10(exp -16)Hz/s solution is favored at the approx. 97% level. This large a nu can be accomodated by an approx. = 1 solar mass detached double degenerate system powered in the X-ray by electrical energy. With such a large nu the system provides a unique opportunity to explore the interaction of gravitational radiation and electromagnetic torques on the evolution of an ultracompact binary.
File Size	592654
Page Count	13
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20030093647
Archival Resource Key	ark:/13960/t05x78q1h
Language	English
Publisher Date	2003-01-01
Access Restriction	Open
Subject Keyword	Astrophysics Rosat Mission Optical Measurement Frequency Shift Cataclysmic Variables X Rays White Dwarf Stars Stellar Mass X Ray Binaries Gravitational Waves Time Measurement Degeneration Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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