Zobrazeno 1 - 10
of 698
pro vyhledávání: '"Malherbe J"'
Publikováno v:
Phys. Rev. B 108, 134404 (2023)
We study by numerical simulation the magnetic order in ensembles of randomly packed magnetic spherical particles which, induced by their uniaxial anisotropy in the strong coupling limit, behave as Ising dipoles. We explore the role of the frozen diso
Externí odkaz:
http://arxiv.org/abs/2307.10047
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
Autor:
Malherbe, J.-M.1 Jean-Marie.Malherbe@obspm.fr
Publikováno v:
Journal of Astronomical History & Heritage. Jun2024, Vol. 27 Issue 2, p303-328. 26p.
Observations of the dynamics of solar coronal structures are necessary to investigate space weather phenomena and global heating of the corona. The profiles of high temperature lines emitted by the hot plasma are usually integrated by narrow band fil
Externí odkaz:
http://arxiv.org/abs/2110.01645
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
The Multichannel Subtractive Double Pass (MSDP) is an imaging spectroscopy technique, which allows observations of spectral line profiles over a 2D field of view with high spatial and temporal resolution. It has been intensively used since 1977 on va
Externí odkaz:
http://arxiv.org/abs/2101.03918
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
Autor:
Malherbe, J. -M., Dalmasse, K.
Publikováno v:
Solar Physics, May 2019, 294:52
Daily full-disk observations of the solar photosphere and chromosphere started at Meudon Observatory in 1908. After a review of the scientific context and the historical background, we describe the instrumental characteristics and capabilities of the
Externí odkaz:
http://arxiv.org/abs/2001.02638
High cadence observations of solar activity (active regions, flares, filaments) in the H$\alpha$ line were performed at Meudon and Haute Provence Observatories from 1956 to 2004. More than 7 million images were recorded, mainly on 35 mm films. After
Externí odkaz:
http://arxiv.org/abs/2001.02162