Zobrazeno 1 - 10
of 241
pro vyhledávání: '"Roudier, T."'
Autor:
Ballot, J., Roudier, T.
Publikováno v:
A&A 691, A68 (2024)
Exploding granules on the solar surface play a major role in the dynamics of the outer part of the convection zone, especially in the diffusion of the magnetic field. We aim to develop an automated procedure able to investigate the location and evolu
Externí odkaz:
http://arxiv.org/abs/2409.04158
The Sun is a magnetic star, and the only spatio-temporally resolved astrophysical system displaying turbulent MHD thermal convection. This makes it a privileged object of study to understand fluid turbulence in extreme regimes and its interactions wi
Externí odkaz:
http://arxiv.org/abs/2404.14383
Detailed knowledge of surface dynamics is one of the key points in understanding magnetic solar activity. The motions of the solar surface, to which we have direct access via the observations, tell us about the interaction between the emerging magnet
Externí odkaz:
http://arxiv.org/abs/2301.07988
Publikováno v:
A&A 652, A103 (2021)
The Sun is the only star where the superficial turbulent convection can be observed at very high spatial resolution. The Solar Dynamics Observatory (SDO) has continuously observed the full Sun from space with multi-wavelength filters since July 2010.
Externí odkaz:
http://arxiv.org/abs/2106.03556
Downflows on the solar surface are suspected to play a major role in the dynamics of the convection zone. We investigate the existence of the long-lasting downflows whose effects influence the interior of the Sun and the outer layers. We study the se
Externí odkaz:
http://arxiv.org/abs/2103.03077
Autor:
Aurière, M., Petit, P., Mathias, P., Konstantinova-Antova, R., Charbonnel, C., Donati, J. -F., Espagnet, O., Folsom, C. P., Roudier, T., Wade, G. A.
Publikováno v:
A&A 646, A130 (2021)
Context: Pollux is considered as an archetype of a giant star hosting a planet. We then discovered a weak magnetic field at its surface using spectropolarimetry. Aims and Methods: We followed up our investigations on Pollux first using ESPaDOnS at CF
Externí odkaz:
http://arxiv.org/abs/2101.02016
Publikováno v:
A&A 641, A50 (2020)
Exploding granules constitute the strongest horizontal flows on the quiet Sun and contribute to the structure of the surface horizontal velocity fields which build the large-scale organization of the discrete magnetic field. In this work we explore e
Externí odkaz:
http://arxiv.org/abs/2007.12438
Publikováno v:
Astronomy and Astrophysics 2019
Trees of fragmenting granules (TFG) and associated flows are suspected to playa major role in the formation of the network in the quiet Sun. We investigate the counterparts, in terms of dynamics, of surface structures detectable by high resolution ob
Externí odkaz:
http://arxiv.org/abs/1901.03255
Publikováno v:
published in Astronomy and Astrophysics 2018
A large filament composed principally of two sections erupted sequentially in the southern hemisphere on January 26 2016. The central, thick part of the northern section was first lifted up and lead to the eruption of the full filament. This event wa
Externí odkaz:
http://arxiv.org/abs/1808.02272
We compare horizontal velocities, vertical magnetic fields and evolution of trees of fragmenting granules (TFG, also named families of granules) derived in the quiet Sun at disk center from observations at solar minimum and maximum of the Solar Optic
Externí odkaz:
http://arxiv.org/abs/1804.01870