Measuring the orbital parameters of Cygnus X-3

Details Measuring the orbital parameters of Cygnus X-3 Measuring the orbital parameters of Cygnus X-3

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002xrb..confe..41s&link_type=abstract

X-ray Binaries in the Chandra and XMM-Newton Era (with an emphasis on Targets of Opportunity), Abstracts of the conference held

Computer Science

High Resolution X-Ray Spectroscopy, Plasma Diagnostics

Scientific paper

Using Chandra data, we have measured phase dependent Doppler shifts in several emission lines in the spectrum of Cygnus X-3. These measurements have enabled us to put an upper limit on the mass of the system that constrains the compact object to < 3.6 MSun. The companion is also constrained to < 7.3MSun. We also make indirect measurements of the orbital distance of the system and the size of the companion. Our analysis prefers models of the system with a small inclination of the orbital plane to the line of sight and a small nonzero eccentricity. Future observations ought to constrain this system much more strongly.

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