A1 Refereed original research article in a scientific journal

High-resolution optical spectroscopy of RS Ophiuchi during 2008-2009




AuthorsSomero A., Hakala P., Wynn G. A.

PublisherOxford University Press

Publication year2017

JournalMonthly Notices of the Royal Astronomical Society

Journal acronymMNRAS

Article numberp.2784-2795

Volume464

Issue3

First page 2784

Last page2795

Number of pages12

ISSN0035-8711

eISSN1365-2966

DOIhttps://doi.org/10.1093/mnras/stw2551


Abstract

RS Ophiuchi (RS Oph) is a symbiotic variable and a recurrent nova (RN).
We have monitored it with the Nordic Optical Telescope and obtained 30
high-resolution (R = 46 000) optical spectra over one orbital cycle
during quiescence. To our knowledge, this is the best-sampled
high-resolution spectroscopic data set of RS Oph over one orbital
period. We do not detect any direct signatures of an accretion disc such
as double peaked emission lines, but many line profiles are complex
consisting of superimposed emission and absorption components. We
measure the spin of the red giant and conclude that it is tidally locked
to the binary orbit. We observe Na I absorption features, probably
arising from the circumbinary medium, that has been shaped by previous
RN outbursts. We do not detect any intrinsic polarization in the optical
wavelengths.



Last updated on 2024-26-11 at 10:48