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pro vyhledávání: '"Paunzen, E"'
The magnetic chemically peculiar Ap stars exhibit an extreme spread of rotational velocities, the reason of which is not well understood. Ap stars with rotational periods of 50 days or longer are know as super-slowly rotating Ap (ssrAp) stars. Photom
Externí odkaz:
http://arxiv.org/abs/2411.01534
When observing astronomical objects, we must deal with extinction (i.e. the absorption and scattering of the emitted radiation by dust and gas between the source and the observer). Interstellar extinction depends on the location of the object and the
Externí odkaz:
http://arxiv.org/abs/2407.21373
Autor:
Bauer-Fasching, B., Bernhard, K., Brändli, E., Burger, H., Eisele, B., Hümmerich, S., Neuhold, J., Paunzen, E., Piecka, M., Ratzenböck, S., Prišegen, M.
The manifestation of surface spots on magnetic chemically peculiar (mCP) stars is most commonly explained by the atomic diffusion theory, which requires a calm stellar atmosphere and only moderate rotation. While very successful and well described, t
Externí odkaz:
http://arxiv.org/abs/2406.06203
Autor:
Paunzen, E., Binder, F., Cyniburk, A., Duffek, M. N., Haberhauer, F., Heinreichsberger, C., Kohlhofer, H., Kueß, L., Maitzen, H. M., Saalmann, T., Schanz, A. M., Schauer, S., Schmidt, K., Tokareva, A., Wizani, I.
The analysis of non-variable stars is generally neglected in the literature. However, such objects are needed for many calibration processes and for testing pulsational models. The photometric time series of the Kepler satellite mission still stand a
Externí odkaz:
http://arxiv.org/abs/2406.06174
Autor:
Kueß, L., Paunzen, E., Faltová, N., Jadlovský, D., Labaj, M., Mesarč, M., Mondal, P., Prišegen, M., Ramezani, T., Supíková, J., Svačinková, K., Vítková, M., Xia, C., Bernhard, K., Hümmerich, S.
Publikováno v:
A&A 687, A176 (2024)
Context. The chemically peculiar (CP) stars of the upper main sequence are defined by spectral peculiarities that indicate unusual elemental abundance patterns in the presence of diffusion in the calm, stellar atmospheres. Some of them have a stable
Externí odkaz:
http://arxiv.org/abs/2405.08946
Autor:
Krticka, J., Krtickova, I., Bidin, C. Moni, Kajan, M., Zaggia, S., Monaco, L., Janik, J., Mikulasek, Z., Paunzen, E.
A fraction of the extreme horizontal branch stars of globular clusters exhibit a periodic light variability that has been attributed to rotational modulation caused by surface spots. These spots are believed to be connected to inhomogeneous surface d
Externí odkaz:
http://arxiv.org/abs/2401.10626
Autor:
Holdsworth, D. L., Cunha, M. S., Lares-Martiz, M., Kurtz, D. W., Antoci, V., Forteza, S. Barceló, De Cat, P., Derekas, A., Kayhan, C., Ozuyar, D., Skarka, M., Hey, D. R., Shi, F., Bowman, D. M., Kobzar, O., Gómez, A. Ayala, Bognár, Zs., Buzasi, D. L., Ebadi, M., Fox-Machado, L., Hernández, A. García, Ghasemi, H., Guzik, J. A., Handberg, R., Handler, G., Hasanzadeh, A., Jayaraman, R., Khalack, V., Kochukhov, O., Lovekin, C. C., Mikołajczyk, P., Mkrtichian, D., Murphy, S. J., Niemczura, E., Olafsson, B. G., Pascual-Granado, J., Paunzen, E., Posiłek, N., Safari, A. Ramón-Ballesta H., Samadi-Ghadim, A., Smalley, B., Sódor, Á., Stateva, I., Suárez, J. C., Szabó, R., Wu, T., Ziaali, E., Zong, W., Seager, S.
We present the results of a systematic search of the Transiting Exoplanet Survey Satellite (TESS) 2-min cadence data for new rapidly oscillating Ap (roAp) stars observed during the Cycle 2 phase of its mission. We find seven new roAp stars previously
Externí odkaz:
http://arxiv.org/abs/2312.04199
Publikováno v:
A&A 676, A88 (2023)
Spectra of planetary nebulae (PNe) are characterised by strong forbidden emission lines and often also by an infrared (IR) excess. A few PNe show dust obscuration events and/or harbour long-period binaries. Some post-asymptotic giant branch stars, sy
Externí odkaz:
http://arxiv.org/abs/2307.01331
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
Publikováno v:
A&A 676, A55 (2023)
High-quality light curves from space missions have opened up a new window on the rotational and pulsational properties of magnetic chemically peculiar (mCP) stars and have fuelled asteroseismic studies. They allow the internal effects of surface magn
Externí odkaz:
http://arxiv.org/abs/2306.12861