تقرير
The intermediate polar cataclysmic variable GK Persei 120 years after the nova explosion: a first dynamical mass study
| العنوان: | The intermediate polar cataclysmic variable GK Persei 120 years after the nova explosion: a first dynamical mass study |
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| المؤلفون: | Álvarez-Hernández, A., Torres, M. A. P., Rodríguez-Gil, P., Shahbaz, T., Anupama, G. C., Gazeas, K. D., Pavana, M., Raj, A., Hakala, P., Stone, G., Gomez, S., Jonker, P. G., Ren, J. -J., Cannizzaro, G., Pastor-Marazuela, I., Goff, W., Corral-Santana, J. M., Sabo, R. |
| سنة النشر: | 2021 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | We present a complete dynamical study of the intermediate polar and dwarf nova cataclysmic variable GK Per (Nova Persei 1901) based on a multi-site optical spectroscopy and $R$-band photometry campaign. The radial velocity curve of the evolved donor star has a semi-amplitude $K_2=126.4 \pm 0.9 \, \mathrm{km}\,\mathrm{s}^{-1}$ and an orbital period $P=1.996872 \pm 0.000009 \, \mathrm{d}$. We refine the projected rotational velocity of the donor star to $v_\mathrm{rot} \sin i = 52 \pm 2 \, \mathrm{km}\,\mathrm{s}^{-1}$ which, together with $K_2$, provides a donor star to white dwarf mass ratio $q=M_2/M_1=0.38 \pm 0.03$. We also determine the orbital inclination of the system by modelling the phase-folded ellipsoidal light curve and obtain $i=67^{\circ} \pm 5^{\circ}$. The resulting dynamical masses are $M_{1}=1.03^{+0.16}_{-0.11} \, \mathrm{M}_{\odot}$ and $M_2 = 0.39^{+0.07}_{-0.06} \, \mathrm{M}_{\odot}$ at $68$ per cent confidence level. The white dwarf dynamical mass is compared with estimates obtained by modelling the decline light curve of the $1901$ nova event and X-ray spectroscopy. The best matching mass estimates come from the nova light curve models and an X-ray data analysis that uses the ratio between the Alfv\'en radius in quiescence and during dwarf nova outburst. Comment: 15 pages, 6 figures, 8 tables, accepted for publication in MNRAS |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/stab2547 |
| الوصول الحر: | http://arxiv.org/abs/2107.06932Test |
| رقم الانضمام: | edsarx.2107.06932 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/stab2547 |
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