Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Laurent Gizon"'
Context: Giant-cell convection is believed to be an important component of solar dynamics. For example, it is expected to play a crucial role in maintaining the Sun's differential rotation. Aims: We re-examine early reports of giant convective cells
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef7c62add724741093b04e47ca999c00
Context. Solar gravity modes (g modes) are buoyancy waves trapped in the solar radiative zone that have been very difficult to detect at the surface. Solar g modes would complement solar pressure modes (p modes) in probing the central regions of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9ac0cfcc818cebdcc8ef4ea1e4ac445
http://arxiv.org/abs/1907.02379
http://arxiv.org/abs/1907.02379
Publikováno v:
Astronomy & Astrophysics
Context. Large-scale equatorial Rossby modes have been observed on the Sun over the last two solar cycles. Aims. We investigate the impact of the time-varying zonal flows on the frequencies of Rossby modes. Methods. A first-order perturbation theory
Autor:
Laurent Gizon, Katepalli R. Sreenivasan, M. Bazot, Pascal Petit, Jørgen Christensen-Dalsgaard, Timothy R. White, David Mary, Martin Bo Nielsen, Othman Benomar
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2018, 619, ⟨10.1051/0004-6361/201834251⟩
Bazot, M, Nielsen, M B, Mary, D, Christensen-Dalsgaard, J, Benomar, O, Petit, P, Gizon, L, Sreenivasan, K R & White, T R 2018, ' Butterfly diagram of a Sun-like star observed using asteroseismology ', Astronomy & Astrophysics, vol. 619, 9 . https://doi.org/10.1051/0004-6361/201834251
Astronomy and Astrophysics-A&A, 2018, 619, ⟨10.1051/0004-6361/201834251⟩
Bazot, M, Nielsen, M B, Mary, D, Christensen-Dalsgaard, J, Benomar, O, Petit, P, Gizon, L, Sreenivasan, K R & White, T R 2018, ' Butterfly diagram of a Sun-like star observed using asteroseismology ', Astronomy & Astrophysics, vol. 619, 9 . https://doi.org/10.1051/0004-6361/201834251
Stellar magnetic fields are poorly understood but are known to be important for stellar evolution and exoplanet habitability. They drive stellar activity, which is the main observational constraint on theoretical models for magnetic field generation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ac40d4391ae1d29a424036345ec8526
https://hal-insu.archives-ouvertes.fr/insu-03678166
https://hal-insu.archives-ouvertes.fr/insu-03678166
Rotational shear in Sun-like stars is thought to be an important ingredient in models of stellar dynamos. Thanks to helioseismology, rotation in the Sun is characterized well, but the interior rotation profiles of other Sun-like stars are not so well
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16087a0628af607c14392b5489744d71
http://arxiv.org/abs/1705.10517
http://arxiv.org/abs/1705.10517
Autor:
Pascal Petit, Jørgen Christensen-Dalsgaard, Shravan M. Hanasoge, Martin Bo Nielsen, Othman Benomar, Katepalli R. Sreenivasan, Laurent Gizon, M. Bazot
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2019, 623, ⟨10.1051/0004-6361/201834594⟩
Bazot, M, Benomar, O, Christensen-Dalsgaard, J, Gizon, L, Hanasoge, S, Nielsen, M, Petit, P & Sreenivasan, K R 2019, ' Latitudinal differential rotation in the solar analogues 16 Cygni A and B ', Astronomy and Astrophysics, vol. 623, A125 . https://doi.org/10.1051/0004-6361/201834594
Astronomy and Astrophysics-A&A, 2019, 623, ⟨10.1051/0004-6361/201834594⟩
Bazot, M, Benomar, O, Christensen-Dalsgaard, J, Gizon, L, Hanasoge, S, Nielsen, M, Petit, P & Sreenivasan, K R 2019, ' Latitudinal differential rotation in the solar analogues 16 Cygni A and B ', Astronomy and Astrophysics, vol. 623, A125 . https://doi.org/10.1051/0004-6361/201834594
Asteroseismology has undergone a profound transformation as a scientific field following the CoRoT and Kepler space missions. The latter is now yielding the first measurements of latitudinal differential rotation obtained directly from oscillation fr
Publikováno v:
Astronomy & Astrophysics. 622:A85
Context. 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 since starspot latitudes are generally unknown. The relate
Autor:
Aaron C. Birch, Michael Bazot, Katepalli R. Sreenivasan, Hiromoto Shibahashi, Takashi Sekii, Masao Takata, Laurent Gizon, D. W. Kurtz, Othman Benomar
Publikováno v:
Science Advances
Stars are not perfectly spherically symmetric. They are deformed by rotation and magnetic fields. Until now, the study of stellar shapes has only been possible with optical interferometry for a few of the fastest-rotating nearby stars. We report an a
Radial differential rotation is an important parameter for stellar dynamo theory and for understanding angular momentum transport. We investigate the potential of using a large number of similar stars simultaneously to constrain their average radial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6e9ccdb5dca489a417b97190b0438da
http://resolver.sub.uni-goettingen.de/purl?gs-1/13440
http://resolver.sub.uni-goettingen.de/purl?gs-1/13440
In previous work we identified six Sun-like stars observed by Kepler with exceptionally clear asteroseismic signatures of rotation. Here, we show that five of these stars exhibit surface variability suitable for measuring rotation. In order to furthe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b5ad6d493d5b01cdf227073a421240a
http://arxiv.org/abs/1508.02164
http://arxiv.org/abs/1508.02164