Doppler tomography and photometry of the cataclysmic variable 1RXS J064434.5+334451
Doppler tomography and photometry of the cataclysmic variable 1RXS J064434.5+334451
We have obtained simultaneous photometric and spectroscopic observations of the cataclysmic variable 1RXS J064434.5+334451. We have calibrated the spectra for slit losses using simultaneous photometry, allowing us to construct reliable Doppler images from H? and He?ii 4686-Å emission lines. We have improved the ephemeris of the object based on new photometric eclipse timings, obtaining HJD = 245?3403.759?533 + 0.269?374?46E. Some eclipses present a clear internal structure, which we attribute to a central He?ii emission region surrounding the white dwarf, a finding supported by Doppler tomography. This indicates that the system has a large inclination angle i = 78 ± 2°. We have also analysed the radial velocity curve from the emission lines to measure its semi-amplitude, K1, from H? and He?ii 4686 and derive the masses of the components M1 = 0.82 ± 0.06 M?, M2 = 0.78 ± 0.04 M? and their separation a = 2.01 ± 0.06 R?. The Doppler tomography and other observed features in this nova-like system strongly suggest that this is a SW Sex type system.
104-113
Hernandez Santisteban, Juan
115e9657-d594-487b-b871-5c61cc32f692
Echevarria, Juan
783b79d8-1f9f-4801-a79c-718d57b3a3b0
Michel, Raul
44ee4d0c-7065-47be-ac7f-5f1b1572579d
Costero, Rafael
ffdfa778-f8bc-4449-92ef-8b290633eab6
January 2017
Hernandez Santisteban, Juan
115e9657-d594-487b-b871-5c61cc32f692
Echevarria, Juan
783b79d8-1f9f-4801-a79c-718d57b3a3b0
Michel, Raul
44ee4d0c-7065-47be-ac7f-5f1b1572579d
Costero, Rafael
ffdfa778-f8bc-4449-92ef-8b290633eab6
Hernandez Santisteban, Juan, Echevarria, Juan and Michel, Raul et al.
(2017)
Doppler tomography and photometry of the cataclysmic variable 1RXS J064434.5+334451.
Monthly Notices of the Royal Astronomical Society, 464 (1), .
(doi:10.1093/mnras/stw2282).
Abstract
We have obtained simultaneous photometric and spectroscopic observations of the cataclysmic variable 1RXS J064434.5+334451. We have calibrated the spectra for slit losses using simultaneous photometry, allowing us to construct reliable Doppler images from H? and He?ii 4686-Å emission lines. We have improved the ephemeris of the object based on new photometric eclipse timings, obtaining HJD = 245?3403.759?533 + 0.269?374?46E. Some eclipses present a clear internal structure, which we attribute to a central He?ii emission region surrounding the white dwarf, a finding supported by Doppler tomography. This indicates that the system has a large inclination angle i = 78 ± 2°. We have also analysed the radial velocity curve from the emission lines to measure its semi-amplitude, K1, from H? and He?ii 4686 and derive the masses of the components M1 = 0.82 ± 0.06 M?, M2 = 0.78 ± 0.04 M? and their separation a = 2.01 ± 0.06 R?. The Doppler tomography and other observed features in this nova-like system strongly suggest that this is a SW Sex type system.
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Accepted/In Press date: 8 September 2016
e-pub ahead of print date: 15 October 2016
Published date: January 2017
Organisations:
Astronomy Group
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Local EPrints ID: 402679
URI: http://eprints.soton.ac.uk/id/eprint/402679
ISSN: 1365-2966
PURE UUID: 0181310f-3c91-4ae6-aa16-bd5971be2761
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Date deposited: 14 Nov 2016 13:25
Last modified: 15 Mar 2024 03:24
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Author:
Juan Hernandez Santisteban
Author:
Juan Echevarria
Author:
Raul Michel
Author:
Rafael Costero
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