Confirmation of a 9.8-day period of Cygnus X-2

Details Confirmation of a 9.8-day period of Cygnus X-2 Confirmation of a 9.8-day period of Cygnus X-2

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pasp...92..147c&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 92, Apr.-May 1980, p. 147, 148.

Astronomy and Astrophysics

Astronomy

15

Binary Stars, Neutron Stars, Orbital Elements, Stellar Spectra, X Ray Sources, Astronomical Spectroscopy, Radial Velocity, Stellar Luminosity, Stellar Mass Accretion

Scientific paper

New spectroscopic observations of Cyg X-2 confirm the period, phasing,
amplitude, and shape of the velocity variations previously discovered.
The degenerate dwarf model put forward by Branduardi et al. (1979) to
explain the X-ray behavior cannot be reconciled with these observations.

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