Zobrazeno 61 - 70
of 227
pro vyhledávání: '"Laurent Gizon"'
Context. Solar Rossby waves (r modes) have recently been discovered in the near-surface horizontal flow field using the techniques of granulation-tracking and ring-diagram analysis applied to six years of SDO/HMI data. Aims. Here we apply time-distan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec503c16be3ef0e59274451f30dbdb00
Context.Previous helioseismology of sunspots has been sensitive to both the structural and magnetic aspects of sunspot structure.Aims.We aim to develop a technique that is insensitive to the magnetic component so the two aspects can be more readily s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::508fe02dc1ee63fdc3ff7e4502887469
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
Autor:
Jesper Schou, Ulrich R. Christensen, Thomas L. Duvall, Aaron C. Birch, Björn Löptien, Bastian Proxauf, Richard S. Bogart, Laurent Gizon
The Sun's complex dynamics is controlled by buoyancy and rotation in the convection zone and by magnetic forces in the atmosphere and corona. While small-scale solar convection is well understood, the dynamics of large-scale flows in the solar convec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b194c199692b5889aff1e4da0f05e1c
The south-north travel-time differences are measured by applying time-distance helioseismology to the MDI and HMI medium-degree Dopplergrams covering May 1996-April 2017. Our data analysis corrects for several sources of systematic effects: P-angle e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15b089b16bf7eef79eff0cdaed830ed3
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
Publikováno v:
Mon Not R Astron Soc
In this article, we derive and compute the sensitivity of measurements of coupling between normal modes of oscillation in the Sun to underlying flows. The theory is based on first-Born perturbation theory, and the analysis is carried out using the fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a937aa56a459ed1d2946d7fcf158a57
https://europepmc.org/articles/PMC7646294/
https://europepmc.org/articles/PMC7646294/
Autor:
Timothy R. Bedding, T. Stahn, H. M. Antia, Yvonne Elsworth, J. P. Marques, Daniel Huber, Amy McQuillan, Michael Bazot, Travis S. Metcalfe, C. Régulo, Guy R. Davies, Jørgen Christensen-Dalsgaard, T. Appourchaux, Timothy R. White, Warrick H. Ball, Savita Mathur, V. Silva Aguirre, Dennis Stello, Rachel Howe, Laurent Gizon, O. L. Creevey, Patrick Gaulme, Rasmus Handberg, Saskia Hekker, Martin Bo Nielsen, Christoffer Karoff, Benoit Mosser, Suzanne Aigrain, Günter Houdek, William J. Chaplin, Tiago L. Campante, Rafael A. García, David Salabert, Othman Benomar
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2017, 601, pp.A82. ⟨10.1051/0004-6361/201628706⟩
NASA Astrophysics Data System
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 601, pp.A82. ⟨10.1051/0004-6361/201628706⟩
White, T R, Benomar, O, Silva Aguirre, V, Ball, W H, Bedding, T R, Chaplin, W J, Christensen-Dalsgaard, J, García, R A, Gizon, L, Stello, D, Aigrain, S, Antia, H M, Appourchaux, T, Bazot, M, Campante, T L, Creevey, O L, Davies, G R, Elsworth, Y P, Gaulme, P, Handberg, R, Hekker, S, Houdek, G, Howe, R, Huber, D, Karoff, C, Marques, J P, Mathur, S, McQuillan, A, Metcalfe, T S, Mosser, B, Nielsen, M B, Régulo, C, Salabert, D & Stahn, T 2017, ' Kepler Observations of the Asteroseismic Binary HD 176465 ', Astronomy & Astrophysics, vol. 601, A82 . https://doi.org/10.1051/0004-6361/201628706
Astronomy and Astrophysics-A&A, 2017, 601, pp.A82. ⟨10.1051/0004-6361/201628706⟩
NASA Astrophysics Data System
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 601, pp.A82. ⟨10.1051/0004-6361/201628706⟩
White, T R, Benomar, O, Silva Aguirre, V, Ball, W H, Bedding, T R, Chaplin, W J, Christensen-Dalsgaard, J, García, R A, Gizon, L, Stello, D, Aigrain, S, Antia, H M, Appourchaux, T, Bazot, M, Campante, T L, Creevey, O L, Davies, G R, Elsworth, Y P, Gaulme, P, Handberg, R, Hekker, S, Houdek, G, Howe, R, Huber, D, Karoff, C, Marques, J P, Mathur, S, McQuillan, A, Metcalfe, T S, Mosser, B, Nielsen, M B, Régulo, C, Salabert, D & Stahn, T 2017, ' Kepler Observations of the Asteroseismic Binary HD 176465 ', Astronomy & Astrophysics, vol. 601, A82 . https://doi.org/10.1051/0004-6361/201628706
Binary star systems are important for understanding stellar structure and evolution, and are especially useful when oscillations can be detected and analysed with asteroseismology. However, only four systems are known in which solar-like oscillations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d3937a3bbbfe50b479f86f47d907704
https://hal-obspm.ccsd.cnrs.fr/obspm-02190189
https://hal-obspm.ccsd.cnrs.fr/obspm-02190189
Autor:
Damien Fournier, Juliette Chabassier, Hélène Barucq, Marc Duruflé, Aaron C. Birch, Laurent Gizon, Thorsten Hohage, Chris S. Hanson, Emanuele Papini, Michael Leguèbe
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2017, 600, pp.A35. ⟨10.1051/0004-6361/201629470⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 600, pp.A35. ⟨10.1051/0004-6361/201629470⟩
Astronomy and Astrophysics-A&A, 2017, 600, pp.A35. ⟨10.1051/0004-6361/201629470⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 600, pp.A35. ⟨10.1051/0004-6361/201629470⟩
Local helioseismology has so far relied on semi-analytical methods to compute the spatial sensitivity of wave travel times to perturbations in the solar interior. These methods are cumbersome and lack flexibility. Here we propose a convenient framewo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0da458f48a7ef011b8aa6e3eea89c667
https://hal.science/hal-01403332/file/main-all-v2.pdf
https://hal.science/hal-01403332/file/main-all-v2.pdf
Autor:
Wolfgang Schmidt, V. Martínez Pillet, Thomas Wiegelmann, M. Knoelker, T. L. Riethmueller, Johann Hirzberger, J. Blanco Rodríguez, Sami K. Solanki, D. Orozco Suárez, J. C. del Toro Iniesta, M. van Noort, Peter Barthol, Laurent Gizon, Robert J. Rutten, Mikolaj Szydlarski, Shahin Jafarzadeh, Achim Gandorfer
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
S. Jafarzadeh et. al.
©2017 The American Astronomical Society. All rights reserved.A dense forest of slender bright fibrils near a small solar active region is seen in high-quality narrowband Ca ii H images from the SuFI instrument onboard the
©2017 The American Astronomical Society. All rights reserved.A dense forest of slender bright fibrils near a small solar active region is seen in high-quality narrowband Ca ii H images from the SuFI instrument onboard the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0974fa33e618490960db2aa3d26e97cb
http://hdl.handle.net/10261/147518
http://hdl.handle.net/10261/147518