The quiescence optical light curve of Nova Scorpii 1994 (=GRO J1655-40)

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dc.creatorvan der Hooft, Frank
dc.creatorHeemskerk, Martin
dc.creatorAlberts, Frank
dc.creatorvan Paradijs, Jan
dc.date1997-09-16
dc.date.accessioned2026-07-07T02:24:15Z
dc.date.available2026-07-07T02:24:15Z
dc.descriptionWe report on extensive V, R, and i band photometry of the black-hole candidate Nova Sco 1994 (GRO J1655-40) obtained during March 1996, when the source was close to its quiescent pre-outburst optical brightness (V=17.3). From our observations and data taken from the literature we derive a refined ephemeris for inferior conjunction of the secondary star: HJD 2449838.4198(52) + 2.62168(14) x N. We have modeled the V, R, and i band light curves in terms of a Roche lobe filling secondary and an accretion disk around the compact star, the latter described as a flat cylinder with a radial temperature distribution. From the shape of the light curve we constrain the binary inclination and mass of the secondary star to lie in the ranges 63.7-70.7 degrees and 1.60-3.10 Solar masses, respectively. This limits the mass of the black-hole to the range 6.29-7.60 Solar Masses. The mass range we obtained for the secondary star is supported by the results of stellar evolution calculations.
dc.descriptionAccepted for publication in Astronomy and Astrophysics Uses L-AA version 3 8 pages plus 10 ps figures
dc.identifierhttps://arxiv.org/abs/astro-ph/9709151
dc.identifierhttp://arxiv.org/abs/astro-ph/9709151
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/11548
dc.subjectAstrophysics
dc.titleThe quiescence optical light curve of Nova Scorpii 1994 (=GRO J1655-40)
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