Zobrazeno 1 - 10
of 496
pro vyhledávání: '"Nielsen, M B"'
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:
Sebastian, D., Triaud, A. H. M. J., Brogi, M., Baycroft, T. A., Standing, M. R., Maxted, P. F. L., Martin, D. V., Sairam, L., Nielsen, M. B.
High-contrast eclipsing binaries with low mass M-dwarf secondaries are precise benchmark stars to build empirical mass-radius relationships for fully convective low-mass ($\rm M_{*} < 0.35\,M_{\rm sun}$) dwarf stars. The contributed light of the M-dw
Externí odkaz:
http://arxiv.org/abs/2402.06449
We present solar low-degree rotational splitting values based on a new analysis of Sun-as-a-star observations from the Birmingham Solar Oscillations Network, covering a 16,425-day period from 1976 December 31--2021 December 20 with a duty cycle of 57
Externí odkaz:
http://arxiv.org/abs/2309.02972
Autor:
Nielsen, M. B., Davies, G. R., Chaplin, W. J., Ball, W. H, Ong, J. M. J., Hatt, E., Jones, B. P., Logue, M.
Publikováno v:
A&A 676, A117 (2023)
The asteroseismic analysis of stellar power density spectra is often computationally expensive. The models used in the analysis may use several dozen parameters to accurately describe features in the spectra caused by oscillation modes and surface gr
Externí odkaz:
http://arxiv.org/abs/2306.13577
We examine the solar-cycle variation of the power in the low-degree helioseismic modes by looking at binned power spectra from 45 years of observations with the Birmingham Solar Oscillations Network, which provides a more robust estimate of the mode
Externí odkaz:
http://arxiv.org/abs/2205.15655
Current and future space-based observatories such as the Transiting Exoplanet Survey Satellite (TESS) and PLATO are set to provide an enormous amount of new data on oscillating stars, and in particular stars that oscillate similar to the Sun. Solar-l
Externí odkaz:
http://arxiv.org/abs/2203.09404
Autor:
Nielsen, M. B., Davies, G. R., Ball, W. H., Lyttle, A. J., Li, T., Hall, O. J., Chaplin, W. J., Gaulme, P., Carboneau, L., Ong, J. M. J., García, R. A., Mosser, B., Roxburgh, I. W., Corsaro, E., Benomar, O., Moya, A., Lund, M. N.
Asteroseismology is an exceptional tool for studying stars by using the properties of observed modes of oscillation. So far the process of performing an asteroseismic analysis of a star has remained somewhat esoteric and inaccessible to non-experts.
Externí odkaz:
http://arxiv.org/abs/2012.00580
Autor:
Nielsen, M. B., Ball, W. H., Standing, M. R., Triaud, A. H. M. J., Buzasi, D., Carboneau, L., Stassun, K. G., Kane, S. R., Chaplin, W. J., Bellinger, E. P., Mosser, B., Roxburgh, I. W., Orhan, Z. Çelik, Yıldız, M., Örtel, S., Vrard, M., Mazumdar, A., Ranadive, P., Deal, M., Davies, G. R., Campante, T. L., García, R. A., Mathur, S., González-Cuesta, L., Serenelli, A.
Publikováno v:
A&A 641, A25 (2020)
The Transiting Exoplanet Survey Satellite (TESS) is observing bright known planet-host stars across almost the entire sky. These stars have been subject to extensive ground-based observations, providing a large number of radial velocity (RV) measurem
Externí odkaz:
http://arxiv.org/abs/2007.00497
Autor:
Karoff, C., Metcalfe, T. S., Montet, B. T., Jannsen, N. E., Santos, A. R. G., Nielsen, M. B., Chaplin, W. J.
By combining ground-based spectrographic observations of variability in the chromospheric emission from Sun-like stars with the variability seen in their eigenmode frequencies, it is possible to relate the changes observed at the surfaces of these st
Externí odkaz:
http://arxiv.org/abs/1902.02172
Publikováno v:
A&A 622, A85 (2019)
During the solar magnetic activity cycle the emergence latitudes of sunspots change, leading to the well-known butterfly diagram. This phenomenon is poorly understood for other stars as starspot latitudes are generally unknown. The related changes in
Externí odkaz:
http://arxiv.org/abs/1812.06414