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Depolarization and Faraday effects in galaxies
Faraday rotation and depolarization of synchrotron radio emission are considered in a consistent general approach, under conditions typical of spiral galaxies, i.e. when the magneto-ionic medium and…
Galactic Magnetism: Recent developments and perspectives
▪ Abstract We discuss current observational and theoretical knowledge of magnetic fields, especially the large-scale structure in the disks and halos of spiral galaxies. Among other topics, we…
Magnetic Field and Rotation in Lower Main-Sequence Stars: An Empirical Time-Dependent Magnetic Bode's Relation?
We find a significant correlation between the magnetic and rotational moments for a sample of 112 lower main-sequence stars. The rotational moment is calculated from measurements of the rotation…
A taxonomic nightmare comes true: phylogeny and biogeography of glassworts (Salicornia L., Chenopodiaceae)
The sequence data show that the taxonomic confusion in Salicornia has two major reasons: in the absence of a global revision and the presence of high phenotypic plasticity, the same widespread genotypes having been given different names in different regions, and striking morphological parallelism and weak morphological differentiation led to the misapplication of the same name to different genotypes in one region.
Structures in the rotation measure sky
Coherent structures in the distribution of the Faraday rotation measure (RM) of extragalactic radio sources are isolated using wavelet transformation techniques. A new algorithm of wavelet analysis…
Galactic dynamo and helicity losses through fountain flow
Aims. Nonlinear behaviour of galactic dynamos is studied, allowing for magnetic helicity removal by the galactic fountain flow. Methods. A suitable advection speed is estimated, and a one-dimensional…
Morphology of Hydatellaceae, an anomalous aquatic family recently recognized as an early-divergent angiosperm lineage.
The family Hydatellaceae was recently reassigned to the early-divergent angiosperm order Nymphaeales rather than the monocot order Poales, and several hypotheses on the homologies of reproductive units in Hy datellaceae are explored.
Evolution of magnetic fields in galaxies and future observational tests with the Square Kilometre Array
Aims. In the context of models of galaxy formation and evolution, we investigate the cosmological evolution of large- and small-scale magnetic fields inside galaxies. Methods. We use the dynamo…
Phylogeny of the genus Lotus (Leguminosae, Loteae): evidence from nrITS sequences and morphology
- G. Degtjareva, T. E. Kramina, D. Sokoloff, T. Samigullin, C. M. Valiejo-Roman, A. Antonov
- 30 June 2006
Adding morphological data to the nrITS matrix produces a better resolved phylogeny of Lotus, and previous findings that Dorycnium and Tetragonolobus cannot be separated from Lotus at the generic level are well supported.
Nonflowers near the base of extant angiosperms? Spatiotemporal arrangement of organs in reproductive units of Hydatellaceae and its bearing on the origin of the flower.
- P. Rudall, M. Remizowa, G. Prenner, C. Prychid, R. Tuckett, D. Sokoloff
- BiologyAmerican journal of botany
Teratological forms of T. submersa indicate a tendency to fasciation and demonstrate that the inside-out structure-the primary feature that separates RUs of Hydatellaceae from more orthodox angiosperm flowers-can be at least partially modified, thus producing a morphology that is closer to an orthodox flower.