UBVRI photometry of the pulsations in V2116Ophiuchi = GX1+4

Details UBVRI photometry of the pulsations in V2116Ophiuchi = GX1+4 UBVRI photometry of the pulsations in V2116Ophiuchi = GX1+4

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.289l..17j&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 289, Issue 4, pp. L17-L20.

Astronomy and Astrophysics

Astronomy

3

Accretion, Accretion Discs, Binaries: Symbiotic, Stars: Individual: V2116Oph, Pulsars: Individual: Gx1+4, X-Rays: Stars

Scientific paper

The colours of pulsed and non-pulsed light in V2116Oph have been measured with the UBVRI photometer of the Laboratorio Nacional de Astrofisica, in Brazil. The symbiotic binary was in an optical bright state with v~17. If the blue component in the spectrum of V2116 Oph follows the prescription for a standard optically thick accretion disc spectrum, its contribution to the light of the system at 6600Angstroms is ~20 times the contribution of the red giant, with E(B-V)=2.1+/-0.1 mag and a distance of 8.3kpc. The pulsed component is estimated to have M_v~-1.7, implying characteristic sizes (for blackbody emission) of 1.4, 4.3 and 9.3Rsolar, for temperatures T_BB=100000, 20000 and 10000K, respectively.

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