Helioseismology with PICARD

Eclipse on the Coral Sea: Cycle 24 Ascending

物理学;天文学

Corbard, T.^1 ; Salabert, D.^1 ; Boumier, P.^2 ; Appourchaux, T.^2 ; Hauchecorne, A.^3 ; Journoud, P.^2 ; Nunge, A.^2 ; Gelly, B.^4 ; Hochedez, J.F.^3 ; Irbah, A.^3 ; Meftah, M.^3 ; Renaud, C.^1 ; Turck-Chièze, S.^5

Laboratoire Lagrange, UMR7293, Observatoire de la Côte d'Azur, 06304 Nice, France^1

Institut d'Astrophysique Spatiale, CNRS-Université Paris XI, UMR 8617, 91405 Orsay, Cedex, France^2

Laboratoire Atmosphères, Milieux, Observations Spatiales, Université Paris VI, F-78280 Guyancourt, France^3

Themis, UPS 853 du CNRS, C/o IAC, Via Lactae s/n, 38200 La Laguna, Tenerife, Spain^4

CEA/IRFU/Service d'Astrophysique, AIM, CE Saclay, 91191 Gif sur Yvette, France^5

关键词: Activity cycles;    G-modes;    Helioseismology;    High resolution image;    Low resolution;    Micro satellite;    Solar shape;    Spectral irradiance;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/440/1/012025/pdf
DOI  :  10.1088/1742-6596/440/1/012025

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

PICARD is a CNES micro-satellite launched in June 2010 [17]. Its main goal is to measure the solar shape, total and spectral irradiance during the ascending phase of the activity cycle. The SODISM telescope onboard PICARD also allows us to conduct a program for helioseismology in intensity at 535.7 nm [5]. One-minute cadence low-resolution full images are available for a so-called medium-l program, and high-resolution images of the limb recorded every 2 minutes are used to study mode amplification near the limb in the perspective of g-mode search. First analyses and results from these two programs are presented here.