Zobrazeno 1 - 10
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pro vyhledávání: '"Malherbe, Jean-Marie"'
Autor:
Malherbe, Jean-Marie
This paper is dedicated to the memory of Paul Felenbok (1936-2020) who was astronomer at Paris-Meudon observatory, and founded in 1974, fifty years ago, a high altitude station (2930 m), above Saint V{\'e}ran village in the southern Alps (Queyras). I
Externí odkaz:
http://arxiv.org/abs/2407.18573
Autor:
Malherbe, Jean-Marie
We present in this paper a compilation of solar atlases from $\lambda$ 3000 {\AA} to $\lambda$ 8800 {\AA} with spectral lines identified by the Moore table and with the corresponding equivalent Lande factors g*. We used two spectra at disk centre ($\
Externí odkaz:
http://arxiv.org/abs/2404.16902
Autor:
Zheng, Chenxi, Roudier, Thierry, Schmieder, Brigitte, Ruan, Guiping, Malherbe, Jean-Marie, Liu, Yang, Chen, Yao, Cao, Wenda
Aims. The aim of this paper is to consider relationship between the decay of sunspots and convection via the motion of the family of granules and how the diffusion mechanism of magnetic field operates in a decaying sunspot. Methods. We report the dec
Externí odkaz:
http://arxiv.org/abs/2404.00889
Autor:
Malherbe, Jean-Marie
The spectroheliograph was invented independently by Henri Deslandres (France) and George Hale (USA) in 1892, following the spectroscopic method suggested by Jules Janssen in 1869. This instrument is dedicated to the production of monochromatic images
Externí odkaz:
http://arxiv.org/abs/2402.16436
Autor:
Malherbe, Jean-Marie
Bernard Lyot invented the monochromatic birefringent filter in 1933 in order to investigate the coronal emissions of solar structures above the limb with the coronagraph installed at the Pic du Midi observatory. The filter was improved later and he m
Externí odkaz:
http://arxiv.org/abs/2402.07516
Autor:
Malherbe, Jean-Marie
The Sun has been observed through a telescope for four centuries. However, its study made a prodigious leap at the end of the nineteenth century with the appearance of photography and spectroscopy, then at the beginning of the following century with
Externí odkaz:
http://arxiv.org/abs/2401.15998
Autor:
Malherbe, Jean-Marie
Imaging spectroscopy is intended to be coupled with adaptive optics (AO) on large solar telescopes, in order to produce high spatial and temporal resolution measurements of velocities and magnetic fields on a 2D target. We present the theoretical cap
Externí odkaz:
http://arxiv.org/abs/2312.06213
The Meudon Solar Tower (MST) is a 0.60 m telescope dedicated to spectroscopic observations of solar regions. It includes a 14-meter focal length spectrograph which offers high spectral resolution. The spectrograph works either in classical thin slit
Externí odkaz:
http://arxiv.org/abs/2312.02555
Imaging spectroscopy is intended to be coupled with adaptive optics (AO) on large telescopes, such as EST, in order to produce high spatial and temporal resolution measurements of velocities and magnetic fields upon a 2D FOV. We propose a high spectr
Externí odkaz:
http://arxiv.org/abs/2311.05225
Imaging spectroscopy is intended to be coupled with adaptive optics (AO) on large telescopes, such as EST, in order to produce high spatial and temporal resolution measurements of velocities and magnetic fields upon a 2D FOV. We propose a Multichanne
Externí odkaz:
http://arxiv.org/abs/2310.05497