Zobrazeno 1 - 10
of 159
pro vyhledávání: '"Korčáková, D."'
Publikováno v:
A&A, 689, A234, September 2024
(Abreviated) FS CMa stars belong to a diverse group of stars exhibiting the B[e] phenomenon, which is manifested mainly by the presence of forbidden emission lines and a~strong infrared (IR) excess in their spectra. Recently, a strong magnetic field
Externí odkaz:
http://arxiv.org/abs/2410.01882
We study the star-disc interaction in the presence of the strong magnetic field ($B_\star=6.2kG$) of a slowly rotating star. This situation describes a post-merger of the spectral type B and has not been previously investigated. We perform a set of r
Externí odkaz:
http://arxiv.org/abs/2402.00720
2.5-MHD models of circumstellar discs around FS~CMa post-mergers : I. Non-stationary accretion stage
We investigate the dynamic evolution of gaseous region around FS~CMa post-mergers. Due to the slow rotation of a central B-type star, the dynamics is driven mainly by the magnetic field of the central star. Recent observations have allowed us to set
Externí odkaz:
http://arxiv.org/abs/2306.16073
Autor:
Krtička, J., Benáček, J., Budaj, J., Korčáková, D., Pál, A., Piecka, M., Zejda, M., Bakış, V., Brož, M., Chang, Hsiang-Kuang, Faltová, N., Gális, R., Jadlovský, D., Janík, J., Kára, J., Kolář, J., Krtičková, I., Kubát, J., Kubátová, B., Kurfürst, P., Labaj, M., Merc, J., Mikulášek, Z., Münz, F., Paunzen, E., Prišegen, M., Ramezani, T., Rievajová, T., Řípa, J., Schmidtobreick, L., Skarka, M., Szász, G., Weiss, W., Zajaček, M., Werner, N.
We outline the impact of a small two-band UV-photometry satellite mission on the field of stellar physics, magnetospheres of stars, binaries, stellar clusters, interstellar matter, and exoplanets. On specific examples of different types of stars and
Externí odkaz:
http://arxiv.org/abs/2306.15081
Autor:
Werner, N., Řípa, J., Münz, F., Hroch, F., Jelínek, M., Krtička, J., Zajaček, M., Topinka, M., Dániel, V., Gromeš, J., Václavík, J., Steiger, L., Lédl, V., Seginak, J., Benáček, J., Budaj, J., Faltová, N., Gális, R., Jadlovský, D., Janík, J., Kajan, M., Karas, V., Korčáková, D., Kosiba, M., Krtičková, I., Kubát, J., Kubátová, B., Kurfürst, P., Labaj, M., Mikulášek, Z., Pál, A., Paunzen, E., Piecka, M., Prišegen, M., Ramezani, T., Skarka, M., Szász, G., Thöne, C., Zejda, M.
We present a near-UV space telescope on a ~70kg micro-satellite with a moderately fast repointing capability and a near real-time alert communication system that has been proposed in response to a call for an ambitious Czech national mission. The mis
Externí odkaz:
http://arxiv.org/abs/2207.05485
Autor:
Harmanec, P., Božić, H., Koubský, P., Yang, S., Ruždjak, D., Sudar, D., Šlechta, M., Wolf, M., Korčáková, D., Zasche, P., Oplištilová, A., Vršnak, D., Ak, H., Eenens, P., Bakiş, H., Bakiş, V., Otero, S., Chini, R., Demsky, T., Barlow, B. N., Svoboda, P., Jonák, J., Vitovský, K., Harmanec, A.
Publikováno v:
A&A 666, A136 (2022)
A reliable determination of the basic physical properties and variability patterns of hot emission-line stars is important for understanding the Be phenomenon and ultimately, the evolutionary stage of Be stars. This study is devoted to one of the mos
Externí odkaz:
http://arxiv.org/abs/2206.11649
Autor:
Hadrava, P., Cabezas, M., Djurašević, G., Garcés, J., Gorda, S. Yu., Jurkovic, M. I., Korčáková, D., Markov, H., Mennickent, R. E., Petrović, J., Vince, I., Zharikov, S.
Publikováno v:
A&A 663, A8 (2022)
Context. The eclipsing close binary UU Cas is an interacting massive double-periodic system with a gainer star partly hidden in an accretion disk. Aims. In order to study the physics of the accretion process in greater detail, along with the structur
Externí odkaz:
http://arxiv.org/abs/2201.13275
Autor:
Korcakova, D., Sestito, F., Manset, N., Kroupa, P., Votruba, V., Slechta, M., Danford, S., Dvorakova, N., Raj, A., Chojnowski, S. D., Singh, H. P.
Publikováno v:
A&A 659, A35 (2022)
We report the first detection of the magnetic field in a star of FS CMa type, a subgroup of objects characterized by the B[e] phenomenon. The split of magnetically sensitive lines in IRAS 17449+2320 determines the magnetic field modulus of 6.2+/-0.2
Externí odkaz:
http://arxiv.org/abs/2201.04645
Autor:
Mennickent, R. E., Djurašević, G., Vince, I., Garcés, J., Hadrava, P., Cabezas, M., Petrović, J., Jurkovic, M. I., Korčáková, D., Markov, H.
Publikováno v:
A&A 642, A211 (2020)
We present the results of the study of the close binary UU Cassiopeiae based on previously published multi wavelength photometric and spectroscopic data. Based on eclipse timings of the last 117 years, we find an improved orbital period of $\rm P_{o}
Externí odkaz:
http://arxiv.org/abs/2009.01352
Autor:
Zasche, P., Uhlar, R., Svoboda, P., Jurysek, J., Korcakova, D., Wolf, M., Slechta, M., Kotkova, L.
Publikováno v:
2019AJ....158...95Z
The eclipsing binaries are still important objects for our understanding of the universe. Especially these ones located within the more complex multiple systems can help us solving the problem of their origin and subsequent evolution of these higher
Externí odkaz:
http://arxiv.org/abs/1908.04975