J/A+A/652/A49 CzeV404 Her light curves and spectra (Kara+, 2021)
The period-gap cataclysmic variable CzeV404 Her:
A link between SW Sex and SU UMa systems.
Kara J., Zharikov S., Wolf M., Kucakova H., Cagas P.,
Medina Rodriguez A.L., Masek M.
<Astron. Astrophys. 652, A49 (2021)>
=2021A&A...652A..49K 2021A&A...652A..49K (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing; Binaries, cataclysmic ; Photometry ;
Spectroscopy
Keywords: novae, cataclysmic variables - stars: fundamental parameters -
stars: individual: CzeV404 Her - methods: observational -
stars: dwarf novae
Abstract:
We present a new study of the eclipsing cataclysmic variable
CzeV404 Her (Porb=0.098d) located in the period gap. This report aims
to determine the object's origin, system parameters and probe the
system's accretion flow structure.
We conducted simultaneous time-resolved photometric and spectroscopic
observations of CzeV404 Her. We applied our light curve modeling
techniques and the Doppler tomography method to determine the system
parameters and analyse the structure of the accretion disk.
We found that the system has a massive white dwarf
MWD=1.00(2)M☉, a mass ratio of q=0.16, and a relatively hot
secondary with an effective temperature T2=4100(50)K. The system
inclination is 78°. The accretion disk spreads out to the tidal
limitation radius and has an extended hot spot/line region. The hot
spot/line is hotter than the rest of the disk's outer part in
quiescence or intermediate state but does not stand out completely
from the disk flux in (super)outbursts.
We claim that this object represents a link between two distinct
classes of SU UMa-type and SW Sex-type cataclysmic variables. The
accretion flow structure in the disk corresponds to the SW Sex
systems, but the physical conditions inside the disk passed into
behaviors of SU UMa-type objects.
Description:
Photometric and spectroscopic observations of CzeV404 Her and times of
eclipses based on photometric observations. Photometric observations
consist of data obtained at different observatories and with different
photometric filters. Spectroscopic observations are presented in
flux-calibrated form when the flux calibration was feasible and in
normalised form when the calibration was not feasible.
Objects:
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RA (2000) DE Designation(s)
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18 30 01.76 +12 33 46.2 CzeV404 Her = 2MASS J18300176+1233462
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table4.dat 59 117 Eclipses
lc.dat 29 14280 Light curve
listsp.dat 118 91 List of spectra
sp/* . 91 Individual spectra
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 F12.6 --- HJD [55835.35/59355.5] Heliocentric Julian date
(HJD-2400000)
17- 28 F12.6 --- BJD [55835.35/59355.5] Barycentric Julian date
(BJD-2400000)
33- 40 F8.6 --- rms Uncertainty of the time determination
49- 55 I7 yr Epoch [-596026] Epoch of the eclipse
57- 59 A3 --- Observatory Place of observations (BSO, LS, OND or SPM)
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Byte-by-byte Description of file: lc.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 F13.7 --- HJD [55835.26/59355.55] Heliocentric Julian date
(HJD-2400000)
17- 22 F6.3 mag mag [14.14/17.89] Magnitude in Filter
25- 29 A5 --- Filter Photometric filter (1)
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Note (1): Filters as follows:
B = B filter
R = R filter
V = V filter
C_OND = clear filter of Ondrejov Observatory
C_BSO = clear filter of BSO
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Byte-by-byte Description of file: listsp.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 30 A30 --- FileName Name of the spectrum file in subdirectory sp
32-118 A87 --- Title Title of the file
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Byte-by-byte Description of file: sp/*
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 16 F16.11 0.1nm lambda Wavelength
20- 32 E13.7 10mW/m2/nm Flux Calibrated flux (erg/cm2/s/Angstroem)
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Acknowledgements:
Jan Kara, honza.kara.7(at)gmail.com
(End) Patricia Vannier [CDS] 23-Jun-2021