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pro vyhledávání: '"Handler, G"'
Stellar theory enables us to understand the properties of stars at different stages of their evolution, and contributes to other fields of astrophysics such as galactic and exoplanet studies. Assessing the accuracy of stellar theories necessitates hi
Externí odkaz:
http://arxiv.org/abs/2408.00126
Autor:
Aliçavuş, F. Kahraman, Handler, G., Chowdhury, S., Niemczura, E., Jayaraman, R., De Cat, P., Ozuyar, D., Aliçavuş, F.
There are different classes of pulsating stars in the H-R diagram. While many of those classes are undisputed, some remain a mystery such as the objects historically called "Maia variables". Whereas the presence of such a class was suggested seven de
Externí odkaz:
http://arxiv.org/abs/2404.16988
Autor:
Eze, C. I., Handler, G.
Publikováno v:
Contributions of the Astronomical Observatory Skalnate Pleso, 54(2): 70-74 (2024)
Asteroseismology coupled with eclipsing binary modelling shows a great potential in improving the efficiency of measurements or calibrations of the interior mixing profile in massive stars. This helps, for instance in treating the challenging and mys
Externí odkaz:
http://arxiv.org/abs/2404.11178
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
Autor:
Ratnasingam, R. P., Rogers, T. M., Chowdhury, S., Handler, G., Vanon, R., Varghese, A., Edelmann, P. V. F.
Publikováno v:
A&A 674, A134 (2023)
Stars with masses above 1.6 solar masses generally possess convective cores and radiative envelopes, which allows the propagation of outward-travelling internal gravity waves. We have studied the generation and propagation of IGWs in such stars using
Externí odkaz:
http://arxiv.org/abs/2305.06379
Several studies have shown that a number of stars pulsating in p modes lie between the $\beta$ Cep and $\delta$ Sct instability strips in the Hertzsprung-Russell (HR) Diagram. At present, there is no certain understanding of how p~modes can be excite
Externí odkaz:
http://arxiv.org/abs/2303.11358
Autor:
Alicavus, F. Kahraman, Pawar, T., Hełminiak, K. G., Handler, G., Moharana, A., Alicavus, F., De Cat, P., Leone, F., Catanzaro, G., Giarrusso, M., Ukita, N., Kambe, E.
The pulsating eclipsing binaries are remarkable systems that provide an opportunity to probe the stellar interior and to determine the fundamental stellar parameters precisely. Especially the detached eclipsing binary systems with (a) pulsating compo
Externí odkaz:
http://arxiv.org/abs/2301.04409
Autor:
da Rosa, Gabriela Oliveira, Kepler, S. O., Córsico, Alejandro H., Costa, J. E. S., Hermes, J. J., Kawaler, S. D., Bell, Keaton J., Montgomery, M. H., Provencal, J. L., Winget, D. E., Handler, G., Dunlap, Bart, Clemens, J. C., Uzundag, Murat
PG 1159-035 is the prototype of the DOV hot pre-white dwarf pulsators. It was observed during the Kepler satellite K2 mission for 69 days in 59 s cadence mode and by the TESS satellite for 25 days in 20 s cadence mode. We present a detailed asterosei
Externí odkaz:
http://arxiv.org/abs/2208.04791
Autor:
Alicavus, F. Kahraman, Handler, G., Alicavus, F., De Cat, P., Bedding, T. R., Lampens, P., Ekinci, O., Gumus, D., Leone, F.
Oscillating eclipsing Algols (oEAs) are remarkable systems which allow us to determine accurate fundamental stellar parameters (mass, radius) and probe the stellar interiors through pulsations. TZ\,Dra is an oEA system containing a $\delta$ Scuti com
Externí odkaz:
http://arxiv.org/abs/2112.03687
Autor:
Shi, Fangfei, Kurtz, Donald W., Holdsworth, Daniel L., Saio, Hideyuki, Cunha, Margarida S., Zhang, Huawei, Fu, Jianning, Handler, G.
We report the frequency analysis of a known roAp star, HD 86181 (TIC 469246567), with new inferences from TESS data. We derive the rotation frequency to be $\nu_{rot}$ = 0.48753 $\pm$ 0.00001d$^{-1}$. The pulsation frequency spectrum is rich, consist
Externí odkaz:
http://arxiv.org/abs/2107.12204