1990
DOI: 10.1017/s0074180900190618
|View full text |Cite
|
Sign up to set email alerts
|

Poloidal Magnetic Fields in Galactic Central Regions

Abstract: We discuss the origin of the observed strong poloidal fields Bz in the central regions of galaxies which have gaseous rings. In the context of galactic disk dynamo models only weak poloidal fields but strong toroidal fields result (Bϕ > Bz). Therefore we tie the strength of the poloidal fields to the central activity and apply known and tested ideas rigorously. A battery process on galactic scales is discussed which ensures the existence of a large scale magnetic field in the inner galactic region. The froz… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1

Citation Types

0
5
0

Year Published

1996
1996
2015
2015

Publication Types

Select...
5

Relationship

1
4

Authors

Journals

citations
Cited by 5 publications
(5 citation statements)
references
References 0 publications
0
5
0
Order By: Relevance
“…The maintenance of such a current, and the confinement of the field, might be accomplished by the Lorentz forces accompanying the quasi-steady radial inflow or outflow (or both) of gas through a vertical magnetic field (e.g. Lesch et al 1989), although the physical elements of such a dynamo mechanism still require elaboration. One hypothesis for the vertical field at the Galactic center, which is appealing both for its simplicity and its seeming inevitability, is that of Sofue & Fujimoto (1987).…”
Section: The Galactic Center Magnetospherementioning
confidence: 99%
“…The maintenance of such a current, and the confinement of the field, might be accomplished by the Lorentz forces accompanying the quasi-steady radial inflow or outflow (or both) of gas through a vertical magnetic field (e.g. Lesch et al 1989), although the physical elements of such a dynamo mechanism still require elaboration. One hypothesis for the vertical field at the Galactic center, which is appealing both for its simplicity and its seeming inevitability, is that of Sofue & Fujimoto (1987).…”
Section: The Galactic Center Magnetospherementioning
confidence: 99%
“…The spectrum of electrons that must be contained within the Milky Way's radio filaments in order to produce their extremely hard synchrotron emission has long been a challenge to explain astrophysically. Since the 1980s, observations of radio filaments have revealed a turnover at ∼10 GHz in the synchrotron spectrum, implying an electron energy spectrum that is strongly peaked (sometimes described in the radio astronomy literature as "monoenergetic" [46,47]) at an energy of approximately ∼10 GeV, propagating in a magnetic field on the order of 100 µG [46,48,49]. The leading astrophysical mechanism proposed to explain these spectra FIG.…”
Section: Synchrotron Emission From the Inner Galaxy's Radio Filamentsmentioning
confidence: 99%
“…• To produce the distinctive spectrum of synchrotron emission that is observed from the Milky Way's non-thermal radio filaments [8], dark matter annihilations must inject an extremely hard spectrum of electrons (sometimes described in the radio literature as "monoenergetic" [27,28]). Dark matter which annihilates to e + e − a significant fraction of the time can accommodate both the observed characteristics of the radio filaments, as well as the WMAP/Planck Haze [9], and could also potentially account for much of the excess isotropic radio background [29].…”
Section: Introductionmentioning
confidence: 99%