The period-gap cataclysmic variable CzeV404 Her: A link between SW Sex and SU UMa systems

@article{58581,
   author = {Kara, J. and Zharikov, S. and Wolf, M. and Kučáková, Hana and Cagas, P. and Medina Rodriguez, A.L. and Masek, M.},
   article_location = {FR - Francouzská republika},
   article_number = {August},
   doi = {http://dx.doi.org/10.1051/0004-6361/202140958},
   keywords = {novae; cataclysmic variables;stars: fundamental parametersstars: individual: CzeV404 Her;methods: observational;stars: dwarf novae},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy & Astrophysics},
   title = {The period-gap cataclysmic variable CzeV404 Her: A link between SW Sex and SU UMa systems},
   url = {https://www.aanda.org/articles/aa/abs/2021/08/aa40958-21/aa40958-21.html},
   volume = {652},
   year = {2021}
}

TY  - JOUR
ID  - 58581
AU  - Kara, J. - Zharikov, S. - Wolf, M. - Kučáková, Hana - Cagas, P. - Medina Rodriguez, A.L. - Masek, M.
PY  - 2021
TI  - The period-gap cataclysmic variable CzeV404 Her: A link between SW Sex and SU UMa systems
JF  - Astronomy & Astrophysics
VL  - 652
IS  - August
SP  - "A49-1"-"A49-12"
EP  - "A49-1"-"A49-12"
SN  - 00046361
KW  - novae
KW  - cataclysmic variables;stars: fundamental parametersstars: individual: CzeV404 Her;methods: observational;stars: dwarf novae
UR  - https://www.aanda.org/articles/aa/abs/2021/08/aa40958-21/aa40958-21.html
N2  - We present a new study of the eclipsing cataclysmic variable CzeV404 Her (P-orb = 0.098 d) that is located in the period gap. Aims. This report determines the origin of the object and the system parameters and probes the accretion flow structure of the system. Methods. We conducted simultaneous time-resolved photometric and spectroscopic observations of CzeV404 Her. We applied our light-curve modelling techniques and the Doppler tomography method to determine the system parameters and analyse the structure of the accretion disk. Results. We found that the system has a massive white dwarf M-WD = 1.00(2) M-circle dot, a mass ratio of q = 0.16, and a relatively hot secondary with an effective temperature T-2 = 4100(50) K. The system inclination is i = 78.8 degrees. The accretion disk spreads out to the tidal limitation radius and has an extended hot spot or line region. The hot spot or line is hotter than the remaining outer part of the disk in quiescence or in intermediate state, but does not stand out completely from the disk flux in (super)outbursts. Conclusions. 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 fit the behaviour of SU UMa-type objects.
ER  - 

KARA, J., S. ZHARIKOV, M. WOLF, Hana KUČÁKOVÁ, P. CAGAS, A.L. MEDINA RODRIGUEZ a M. MASEK. The period-gap cataclysmic variable CzeV404 Her: A link between SW Sex and SU UMa systems. \textit{Astronomy \&{} Astrophysics}. FR - Francouzská republika, 2021, roč.~652, August, s.~''A49-1''-''A49-12'', 12 s. ISSN~0004-6361. Dostupné z: https://dx.doi.org/10.1051/0004-6361/202140958.