Th. Roudier
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View article: Automated detection of exploding granules with SDO/HMI data
Automated detection of exploding granules with SDO/HMI data Open
Context. 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. Aims. We aim to develop an automated procedure able to investig…
View article: Automated detection of exploding granules with SDO/HMI data
Automated detection of exploding granules with SDO/HMI data Open
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 locatio…
View article: Three-dimensional imaging of convective cells in the photosphere of Betelgeuse
Three-dimensional imaging of convective cells in the photosphere of Betelgeuse Open
Understanding convection in red supergiants and the mechanisms that trigger the mass loss from these evolved stars are the general goals of most observations of Betelgeuse and its inner circumstellar environment. Linear spectropolarimetry …
View article: Three-dimensional imaging of convective cells in the photosphere of Betelgeuse
Three-dimensional imaging of convective cells in the photosphere of Betelgeuse Open
Aims. Understanding convection in red supergiants and the mechanisms that trigger the mass loss from these evolved stars are the general goals of most observations of Betelgeuse and its inner circumstellar environment. Methods. Linear spec…
View article: FIVE DECADES OF SOLAR RESEARCH AT THE PIC DU MIDI TURRET-DOME (1960-2010). PART 1: OVERVIEW OF INSTRUMENTATION AND OBSERVATIONS
FIVE DECADES OF SOLAR RESEARCH AT THE PIC DU MIDI TURRET-DOME (1960-2010). PART 1: OVERVIEW OF INSTRUMENTATION AND OBSERVATIONS Open
International audience
View article: Photospheric downflows observed with SDO/HMI, HINODE, and an MHD simulation
Photospheric downflows observed with SDO/HMI, HINODE, and an MHD simulation Open
Downflows on the solar surface are suspected to play a major role in the dynamics of the convection zone, at least in its outer part. We investigate the existence of the long-lasting downflows whose effects influence the interior of the Su…
View article: Link between trees of fragmenting granules and deep downflows in MHD simulation
Link between trees of fragmenting granules and deep downflows in MHD simulation Open
Context . Trees of fragmenting granules (TFG) and associated flows are suspected to play a major role in the formation of the network in the quiet Sun. We investigate the counterparts, in terms of dynamics, of surface structures detectable…
View article: Large-scale photospheric motions determined from granule tracking and helioseismology from SDO/HMIdata
Large-scale photospheric motions determined from granule tracking and helioseismology from SDO/HMIdata Open
Context. Large-scale flows in the Sun play an important role in the dynamo process linked to the solar cycle. The important large-scale flows are the differential rotation and the meridional circulation with an amplitude of km s −1 and few…
View article: Dynamics of the photosphere along the solar cycle from SDO/HMI
Dynamics of the photosphere along the solar cycle from SDO/HMI Open
Context. As the global magnetic field of the Sun has an activity cycle, one expects to observe some variation of the dynamical properties of the flows visible in the photosphere. Aims. We investigate the flow field during the solar cycle b…
View article: The magnetic fields at the surface of active single G-K giants
The magnetic fields at the surface of active single G-K giants Open
Aims. We investigate the magnetic field at the surface of 48 red giants selected as promising for detection of Stokes V Zeeman signatures in their spectral lines. In our sample, 24 stars are identified from the literature as presenting mod…