SIMBAD references

2017MNRAS.464..104H - Mon. Not. R. Astron. Soc., 464, 104-113 (2017/January-1)

Doppler tomography and photometry of the cataclysmic variable 1RXS J064434.5+334451.

HERNANDEZ SANTISTEBAN J.V., ECHEVARRIA J., MICHEL R. and COSTERO R.

Abstract (from CDS):

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 Hα 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 Hα 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.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): accretion, accretion discs - methods: observational - stars: individual: J0644+3344 - stars: individual: SW Sex - novae, cataclysmic variables - novae, cataclysmic variables

Simbad objects: 9

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2021.06.13-14:39:27

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