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• W1963570574 startingPage "721" @default.
• W1963570574 abstract "I report on the discovery of the orbital periods of three recurrent novae in our galaxy. V745 Sco has an orbital period of 510+-20 days with ellipsoidal modulations, based on SMARTS photometry from 2004-2008. V3890 Sgr has an orbital period of 519.7+-0.3 days with ellipsoidal modulations and a shallow eclipse, based primarily on SMARTS and AAVSO photometry from 1995-2008, but also extending back to 1899 with archival plates. In addition, a sinusoidal modulation of amplitude 0.2 mag and period 103.8+-0.4 days is seen mainly in the red, with this attributed to ordinary pulsations in the giant companion star. V394 CrA has an orbital period equal to twice its primary photometric period (P_orb=1.515682+-0.000008 days), as based on photometry extending from 1989-2008. I use all available information (including the UBVRIJHK spectral energy distributions) to get distances to the four RNe with red giant companions as 800+-140 pc for T CrB, 4300+-700 pc for RS Oph, 7300+-1200 pc for V745 Sco, and 6000+-1000 pc for V3890 Sgr. Further, the red giant in the RS Oph system has a mass loss rate of close to 3.7x10^-8 M_sun/yr as based on many confident measures, and this is too weak (by a factor of 100,000) to supply the white dwarf with mass at the known rate of 3.9x10^-6 M_sun/yr. Thus, the only way to get matter onto the white dwarf fast enough is through Roche lobe overflow, and this confidently demonstrates that the distance to RS Oph is >~3000 pc." @default.
• W1963570574 created "2016-06-24" @default.
• W1963570574 creator A5044617944 @default.
• W1963570574 date "2009-05-04" @default.
• W1963570574 modified "2023-09-29" @default.
• W1963570574 title "ORBITAL PERIODS FOR THREE RECURRENT NOVAE" @default.
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• W1963570574 doi "https://doi.org/10.1088/0004-637x/697/1/721" @default.
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