Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Sokoloff, Dmitri"'
Autor:
Moss, David, Sokoloff, Dmitri
Publikováno v:
A&A 598, A72 (2017)
Observations of dwarf galaxies suggest the presence of large-scale magnetic fields. However the size and slow rotation of these galaxies appear insufficient to support a mean-field dynamo action to excite such fields. Here we suggest a new mechanism
Externí odkaz:
http://arxiv.org/abs/1610.07360
Magnetic fields are important for accretion disc structure. Magnetic fields in a disc system may be transported with the accreted matter. They can be associated with either the central body and/or jet, and be fossil or dynamo excited in situ. We cons
Externí odkaz:
http://arxiv.org/abs/1601.07903
Publikováno v:
A&A 578, A94 (2015)
Observations of regular magnetic fields in several nearby galaxies reveal magnetic arms situated between the material arms. The nature of these magnetic arms is a topic of active debate. Previously we found a hint that taking into account the effects
Externí odkaz:
http://arxiv.org/abs/1504.07824
Galactic encounters are usually marked by a substantial increase of synchrotron emission of the interacting galaxies compared to the typical emission from similar isolated galaxies. This is believed to be associated with an increase of the star forma
Externí odkaz:
http://arxiv.org/abs/1403.6148
During a solar magnetic field reversal the magnetic dipole moment does not vanish, but migrates between poles, in contradiction to the predictions of mean-field dynamo theory. We try to explain this as a consequence of magnetic fluctuations. We explo
Externí odkaz:
http://arxiv.org/abs/1211.5253
Autor:
Moss, David, Sokoloff, Dmitri
We study activity waves of the kind that determine cyclic magnetic activity of various stars, including the Sun, as a more general physical rather than a purely astronomical problem. We try to identify resonances which are expected to occur when a me
Externí odkaz:
http://arxiv.org/abs/1211.2414
Autor:
Sokoloff, Dmitri, Moss, David
We demonstrate that a quasi-uniform cosmological seed field is a much less suitable seed for a galactic dynamo than has often been believed. The age of the Universe is insufficient for a conventional galactic dynamo to generate a contemporary galacti
Externí odkaz:
http://arxiv.org/abs/1208.3666
Autor:
Moss, David, Sokoloff, Dmitri
We argue that global magnetic field reversals similar to those observed in the Milky Way occur quite frequently in mean-field galactic dynamo models that have relatively strong, random, seed magnetic fields that are localized in discrete regions. The
Externí odkaz:
http://arxiv.org/abs/1208.3440
Autor:
Moss, David, Stepanov, Rodion, Arshakian, Tigran, Beck, Rainer, Krause, Marita, Sokoloff, Dmitri
Magnetic fields in nearby, star-forming galaxies reveal both large-scale patterns and small-scale structures. A large-scale field reversal may exist in the Milky Way but no such reversals have been observed so far in external galaxies. The effects of
Externí odkaz:
http://arxiv.org/abs/1109.4062