T. Corbard
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View article: Author Correction: Helioseismic inference of the solar radiative opacity
Author Correction: Helioseismic inference of the solar radiative opacity Open
View article: Rotational radial shear in the low solar photosphere
Rotational radial shear in the low solar photosphere Open
Context. Radial differential rotation is an important factor in stellar dynamo theory. In the Sun, helioseismology has revealed a near-surface shear layer in the upper 5–10 percent of the convection zone. At low to midlatitudes, the rotati…
View article: Helioseismic inference of the solar radiative opacity
Helioseismic inference of the solar radiative opacity Open
The Sun is the most studied of all stars, and thus constitutes a benchmark for stellar models. However, our vision of the Sun is still incomplete, as illustrated by the current debate on its chemical composition. The problem reaches far be…
View article: Rotational radial shear in the low solar photosphere
Rotational radial shear in the low solar photosphere Open
Context. Radial differential rotation is an important physical ingredient in stellar dynamo theory. In the case of the Sun, heliosismology techniques have revealed the existence of a near-surface shear layer covering 15–20% of the upper co…
View article: Monitoring fast solar chromospheric activity: the MeteoSpace project
Monitoring fast solar chromospheric activity: the MeteoSpace project Open
We present in this reference paper an instrumental project dedicated to the monitoring of solar activity during solar cycle 25. It concerns the survey of fast evolving chromospheric events implied in Space Weather, such as flares, coronal …
View article: The potential of Meudon spectroheliograph for investigating long term solar activity and variability
The potential of Meudon spectroheliograph for investigating long term solar activity and variability Open
View article: Monitoring fast solar chromospheric activity: the MeteoSpace project
Monitoring fast solar chromospheric activity: the MeteoSpace project Open
View article: A journey of exploration to the polar regions of a star: probing the solar poles and the heliosphere from high helio-latitude
A journey of exploration to the polar regions of a star: probing the solar poles and the heliosphere from high helio-latitude Open
View article: Optical instrumentation for chromospheric monitoring during solar cycle 25 at Paris and Côte d’Azur observatories
Optical instrumentation for chromospheric monitoring during solar cycle 25 at Paris and Côte d’Azur observatories Open
We present the observing program proposed by Paris and Côte d’Azur Observatories for monitoring solar activity during the upcoming cycle 25 and providing near real time images and movies of the chromosphere for space-weather research and a…
View article: Meteospace, a New Instrument for Solar Survey at the Calern Observatory
Meteospace, a New Instrument for Solar Survey at the Calern Observatory Open
View article: Searching for <i>g</i> modes
Searching for <i>g</i> modes Open
Context . The recent claims of g -mode detection have restarted the search for these potentially extremely important modes. The claimed detection of g modes was obtained from the analysis of the power spectrum of the time series of round-t…
View article: On the importance of astronomical refraction for modern solar astrometric measurements
On the importance of astronomical refraction for modern solar astrometric measurements Open
In this work we study in details the influence of pure astronomical\nrefraction on solar metrologic measurements made from ground-based full disk\nimagery and provide the tools for correcting the measurements and estimating\nthe associated…
View article: Searching for <i>g</i> modes
Searching for <i>g</i> modes Open
Context . The recent claims of g -mode detection have restarted the search for these potentially extremely important modes. These claims can be reassessed in view of the different data sets available from the SoHO instruments and ground-ba…
View article: Solar radius determined from PICARD/SODISM observations and extremely weak wavelength dependence in the visible and the near-infrared
Solar radius determined from PICARD/SODISM observations and extremely weak wavelength dependence in the visible and the near-infrared Open
Context . In 2015, the International Astronomical Union (IAU) passed Resolution B3, which defined a set of nominal conversion constants for stellar and planetary astronomy. Resolution B3 defined a new value of the nominal solar radius ( R …
View article: Asymptotic <i>g</i> modes: Evidence for a rapid rotation of the solar core
Asymptotic <i>g</i> modes: Evidence for a rapid rotation of the solar core Open
Context. Over the past 40 years, helioseismology has been enormously successful in the study of the solar interior. A shortcoming has been the lack of a convincing detection of the solar g modes, which are oscillations driven by gravity an…
View article: Héliosismologie et Astrométrie solaire à haute résolution
Héliosismologie et Astrométrie solaire à haute résolution Open
Research in solar and stellar physics has been tremendously influenced these past decades by the use of seismic techniques that allowed us for the first time to explore the interior of stars. For the Sun, it is possible to go even further …
View article: METEOSPACE, surveillance solaire et météorologie de l’espace à Calern
METEOSPACE, surveillance solaire et météorologie de l’espace à Calern Open
National audience
View article: METEOSPACE, solar monitoring and space weather at Calern observatory
METEOSPACE, solar monitoring and space weather at Calern observatory Open
International audience
View article: MISOLFA: a generalized monitor for daytime spatio-temporal turbulence characterization
MISOLFA: a generalized monitor for daytime spatio-temporal turbulence characterization Open
Ground-based solar observations are strongly affected by optical turbulence. The concept of a new instrument which allows one to measure both spatial and temporal parameters of atmospheric turbulence has been proposed in the late 1990s. Th…
View article: ON THE CONSTANCY OF THE DIAMETER OF THE SUN DURING THE RISING PHASE OF SOLAR CYCLE 24
ON THE CONSTANCY OF THE DIAMETER OF THE SUN DURING THE RISING PHASE OF SOLAR CYCLE 24 Open
International audience
View article: On the Determination and Constancy of the Solar Oblateness
On the Determination and Constancy of the Solar Oblateness Open
International audience
View article: European Helio- and Asteroseismology Network - HELAS
European Helio- and Asteroseismology Network - HELAS Open
The objective of the European Helio- and Asteroseismology Network (HELAS) is to coordinate the activities of the European activities in helio- and asteroseismology. HELAS was funded as Coordination Action under the European Union's Framewo…