Zobrazeno 1 - 10
of 418
pro vyhledávání: '"Cunha, M S"'
We explore a static and stationary black bounce geometry inspired by Loop Quantum Gravity (LQG), focusing on how LQG corrections and regularization parameters affect its properties. Building on the spherically symmetric and static black hole solution
Externí odkaz:
http://arxiv.org/abs/2408.08542
Autor:
Campante, T. L., Kjeldsen, H., Li, Y., Lund, M. N., Silva, A. M., Corsaro, E., da Silva, J. Gomes, Martins, J. H. C., Adibekyan, V., Silva, T. Azevedo, Bedding, T. R., Bossini, D., Buzasi, D. L., Chaplin, W. J., Costa, R. R., Cunha, M. S., Cristo, E., Faria, J. P., García, R. A., Huber, D., Lundkvist, M. S., Metcalfe, T. S., Monteiro, M. J. P. F. G., Neitzel, A. W., Nielsen, M. B., Poretti, E., Santos, N. C., Sousa, S. G.
Publikováno v:
A&A, 683, L16 (2024)
Fuelled by space photometry, asteroseismology is vastly benefitting the study of cool main-sequence stars, which exhibit convection-driven solar-like oscillations. Even so, the tiny oscillation amplitudes in K dwarfs continue to pose a challenge to s
Externí odkaz:
http://arxiv.org/abs/2403.16333
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:
Santos, A. R. G., Mathur, S., García, R. A., Broomhall, A. -M., Egeland, R., Jiménez, A., Godoy-Rivera, D., Breton, S. N., Claytor, Z. R., Metcalfe, T. S., Cunha, M. S., Amard, L.
Publikováno v:
A&A (2023), 672, A56
The photometric time series of solar-like stars can exhibit rotational modulation due to active regions co-rotating with the stellar surface, allowing us to constrain stellar rotation and magnetic activity. In this work we investigate the behavior, p
Externí odkaz:
http://arxiv.org/abs/2304.03165
Autor:
Deal, M., Goupil, M. -J., Cunha, M. S., Monteiro, M. J. P. F. G., Lebreton, Y., Christophe, S., Pereira, F., Samadi, R., Oreshina, A. V., Buldgen, G.
Publikováno v:
A&A 673, A49 (2023)
The transition between convective and radiative stellar regions is still not fully understood. The sharp variations in sound speed located in these transition regions give rise to a signature in specific seismic indicators, opening the possibility to
Externí odkaz:
http://arxiv.org/abs/2303.14026
Publikováno v:
Astronomische Nachrichten, Volume 344, Issue 5, article id. easna.20220090, 2023
We developed, tested and validated a new Fast, Robust and Automated (FRA) tool to detect solar-like oscillations. FRA is based on the detection and measurement of the frequency of maximum oscillation power $\nu_{max}$, without relying on the detectio
Externí odkaz:
http://arxiv.org/abs/2303.03976
Publikováno v:
Universe 2022, 8(12), 616
In this paper, we study quantum relativistic features of a scalar field around the Rindler-Schwarzschild wormhole. First, we introduce this new class of spacetime, investigating some energy conditions and verifying their violation in a region nearby
Externí odkaz:
http://arxiv.org/abs/2210.07427
In this paper we study the possibility of non-relativistic quantum particles to traverse the generalized Ellis-Bronnikov wormholes by considering quantum effects, such as tunneling. We have used the generalized Ellis-Bronnikov wormhole metric and fou
Externí odkaz:
http://arxiv.org/abs/2207.04559
Publikováno v:
Eur. Phys. J. C (2022) 82:669
We examine the interaction between massless scalar fields and the gravitational field generated by a black hole solution that was recently obtained in the consistent well-defined 4-dimensional Einstein-Gauss-Bonnet gravity with a cosmological constan
Externí odkaz:
http://arxiv.org/abs/2205.15613
Publikováno v:
Annals of Physics 443, 168980 (2022)
In this paper, we obtain a static black string solution for a bilocal gravitational source in 3+1 dimensions. The solution is regular at the origin and tends asymptotically to the ordinary static uncharged black string solution of general relativity.
Externí odkaz:
http://arxiv.org/abs/2202.13935