Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Laurent Gizon"'
Autor:
Martin Bo Nielsen, Laurent Gizon, Othman Benomar, Hideyuki Hotta, Masao Takata, Takashi Sekii, Shravan M. Hanasoge, Jørgen Christensen-Dalsgaard, M. Bazot, Katepalli R. Sreenivasan
Publikováno v:
Benomar, O, Bazot, M, Nielsen, M B, Gizon, L, Sekii, T, Takata, M, Hotta, H, Hanasoge, S, Sreenivasan, K R & Christensen-Dalsgaard, J 2018, ' Asteroseismic detection of latitudinal differential rotation in 13 Sun-like stars ', Science, vol. 361, no. 6408, pp. 1231-+ . https://doi.org/10.1126/science.aao6571
The differentially rotating outer layers of stars are thought to play a role in driving their magnetic activity, but the underlying mechanisms that generate and sustain differential rotation are poorly understood. We report the measurement of latitud
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a62763cedd7722281de2ecd5c2cf552a
https://pure.au.dk/portal/da/publications/asteroseismic-detection-of-latitudinal-differential-rotation-in-13-sunlike-stars(86d5de95-7291-40e9-b32f-239b4b1f74f8).html
https://pure.au.dk/portal/da/publications/asteroseismic-detection-of-latitudinal-differential-rotation-in-13-sunlike-stars(86d5de95-7291-40e9-b32f-239b4b1f74f8).html
Publikováno v:
Astronomy & Astrophysics. 642:A178
Retrograde-propagating waves of vertical vorticity with longitudinal wavenumbers between 3 and 15 have been observed on the Sun with a dispersion relation close to that of classical sectoral Rossby waves. The observed vorticity eigenfunctions are sym
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
Observations from the Solar Dynamics Observatory (SDO) have the potential for allowing the helioseismic study of the formation of hundreds of active regions, which would enable us to perform statistical analyses. Our goal is to collate a uniform data
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b27d3265479875a5cc12a152c2884d2e
http://arxiv.org/abs/1608.08005
http://arxiv.org/abs/1608.08005
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
Context. Several upcoming and proposed space missions, such as Solar Orbiter, will be limited in telemetry and thus require data compression. Aims. We test the impact of data compression on local correlation tracking (LCT) of time-series of continuum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cac6ad8b66aacbdca5d4a63da6e4e0d9
http://arxiv.org/abs/1512.03243
http://arxiv.org/abs/1512.03243
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
Our Sun, primarily composed of ionized hydrogen and helium, has a surface temperature of 5777~K and a radius $R_\odot \approx 696,000$ km. In the outer $R_\odot/3$, energy transport is accomplished primarily by convection. Using typical convective ve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb93d44495e0f9d5c2e5256edade4edc