Continued Monitoring of the Orbital Evolution of RX J1914.4+2456

Details Continued Monitoring of the Orbital Evolution of RX J1914.4+2456 Continued Monitoring of the Orbital Evolution of RX J1914.4+2456

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cxo..prop.1404s&link_type=abstract

Chandra Proposal ID #05300266

Computer Science

Chandra Proposal Id #05300266

Scientific paper

We propose to continue monitoring the orbital evolution of RX J1914.4+2456, a candidate double-degenerate binary with one of the shortest orbital periods known. Previous ROSAT and ASCA data suggest that the orbit is decaying at a rate consistent with gravitational wave losses. One of our approved AO4 observations was performed recently. The data are superb and a preliminary analysis has already reached some interesting conclusions. We find no evidence for a 2nd periodicity which might be present if the system were an IP rather than an ultracompact binary. The orbital frequency measured with Chandra supports the earlier ephemeris derived from ROSAT and ASCA, however, the inferred frequency derivative is higher, suggesting that the torque may be variable.

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