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

J. V. Hernández Santisteban; J. Echevarría; R. Michel; R. Costero

doi:10.1093/mnras/stw2282

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

J. V. Hernández Santisteban, J. Echevarría, R. Michel, R. Costero

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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 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.

Original language	English
Pages (from-to)	104-113
Journal	Monthly Notices of the Royal Astronomical Society
Volume	464
Issue number	1
Early online date	14 Oct 2016
DOIs	https://doi.org/10.1093/mnras/stw2282
Publication status	Published - Jan 2017

Keywords

Accretion
Accretion discs
Methods: observational
Stars: individual: J0644+3344
Stars: individual: SW Sex
Novae
Cataclysmic variables

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10.1093/mnras/stw2282

Hernández Santisteban-2016-Doppler-MNRAS-stw2282
© 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at https://doi.org/10.1093/mnras/stw2282
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title = "Doppler tomography and photometry of the cataclysmic variable 1RXS J064434.5+334451",

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 Hα and He ii 4686-{\AA} 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.",

keywords = "Accretion, Accretion discs, Methods: observational, Stars: individual: J0644+3344, Stars: individual: SW Sex, Novae, Cataclysmic variables",

author = "{Hern{\'a}ndez Santisteban}, {J. V.} and J. Echevarr{\'i}a and R. Michel and R. Costero",

year = "2017",

month = jan,

doi = "10.1093/mnras/stw2282",

language = "English",

volume = "464",

pages = "104--113",

journal = "Monthly Notices of the Royal Astronomical Society",

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publisher = "Oxford University Press",

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}

TY - JOUR

T1 - Doppler tomography and photometry of the cataclysmic variable 1RXS J064434.5+334451

AU - Hernández Santisteban, J. V.

AU - Echevarría, J.

AU - Michel, R.

AU - Costero, R.

PY - 2017/1

Y1 - 2017/1

N2 - 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.

AB - 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.

KW - Accretion

KW - Accretion discs

KW - Methods: observational

KW - Stars: individual: J0644+3344

KW - Stars: individual: SW Sex

KW - Novae

KW - Cataclysmic variables

U2 - 10.1093/mnras/stw2282

DO - 10.1093/mnras/stw2282

M3 - Article

SN - 0035-8711

VL - 464

SP - 104

EP - 113

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

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

Abstract

Keywords

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