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Photoionization modelling of quiescence-phase spectra of novae and a symbiotic star

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dc.contributor.author Mondal, Anindita
dc.contributor.author Das, Ramkrishna
dc.contributor.author Anupama, G. C
dc.contributor.author Mondal, Soumen
dc.date.accessioned 2020-11-26T15:22:54Z
dc.date.available 2020-11-26T15:22:54Z
dc.date.issued 2020-02
dc.identifier.citation Monthly Notices of the Royal Astronomical Society, Vol. 492, No. 2, pp.2326–2334 en_US
dc.identifier.issn 1365-2966
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7391
dc.description Restricted Access © Royal Astronomical Society https://academic.oup.com/mnras/article/492/2/2326/5707389 en_US
dc.description.abstract Using observed and published spectra in the optical region, we have studied a handful of novae and symbiotic stars that show novae-like variability in the quiescence phase. We present results for the novae T Coronae Borealis, GK Persei, RS Ophiuchi, V3890 Sagittarii and V745 Scorpii, and for a symbiotic star BX Monocerotis. Observations were carried out at the 2-m Himalayan Chandra Telescope (HCT). Generally, the spectra show prominent low-ionization emission features of hydrogen, helium, iron and oxygen and TiO absorption features resulting from the cool secondary component; T Coronae Borealis and GK Persei show higher ionization lines. We used the photoionization code CLOUDY to model these spectra. From the best-fitting models, we have estimated the physical parameters (e.g. temperature, luminosity and hydrogen density), the elemental abundances and other parameters related to the system. By matching the spectra of various giants with the absorption features and using the best fit, we have determined the types of secondaries and also their contribution to the spectra en_US
dc.language.iso en en_US
dc.publisher Oxford University Press on behalf of the Royal Astronomical Society en_US
dc.subject methods: observational – techniques en_US
dc.subject spectroscopic – novae, cataclysmic variables. en_US
dc.title Photoionization modelling of quiescence-phase spectra of novae and a symbiotic star en_US
dc.type Article en_US


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