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506 papers · 1 filter
Correcting the effect of magnetic tongues on the tilt angle of bipolar active regions
M. Poisson, M. C. López Fuentes, C. H. Mandrini +2
The magnetic polarities of bipolar active regions (ARs) exhibit elongations in line-of-sight magnetograms during their emergence. These elongations are referred to as magnetic tong…
Solving over Finite Fields
Kwang Ho Kim, Junyop Choe, Sihem Mesnager
Solving the equation over finite field $\GF{Q}$, where and is a prime, arises in many different contexts including finite geometry, the i…
Quantum Mixmaster as a model of the Primordial Universe
Hervé Bergeron, Ewa Czuchry, Jean-Pierre Gazeau +1
The Mixmaster solution to Einstein field equations was examined by C. Misner in an effort to better understand the dynamics of the early universe. We highlight the importance of th…
Re-analysis of Lepping's Fitting Method for Magnetic Clouds: Lundquist Fit Reloaded
P. Démoulin, S Dasso, M. Janvier +1
Magnetic clouds (MCs) are a subset of ejecta, launched from the Sun as coronal mass ejections. The coherent rotation of the magnetic field vector observed in MCs leads to envision…
Magnetic geometry and surface differential rotation of the bright Am star Alhena A
Aurore Blazère, Pascal Petit, Coralie Neiner +5
Alhena A ( Gem A) is a bright Am star, with the strongest disc-integrated magnetic field strength reported so far for an Am star. Its spectrum exhibits standard circularly polar…
Spatial segregation of massive clusters in dwarf galaxies
Bruce G. Elmegreen, A. Adamo, M. Boquien +14
The relative average minimum projected separations of star clusters in the Legacy ExtraGalactic UV Survey (LEGUS) and in tidal dwarfs around the interacting galaxy NGC 5291 are det…