Testing the cosmological evolution of magnetic fields in galaxies with the SKA

被引：1

作者：

Arshakian, Tigran G. ^{[1
]}

Beck, Rainer ^{[1
]}

Krause, Marita ^{[1
]}

Sokoloff, Dimitry ^{[2
]}

机构：

[1] Max Planck Inst Radioastron, Hugel 69, D-5300 Bonn, Germany

[2] Moscow MV Lomonosov State Univ, Dept Phys, Moscow, Russia

来源：

COSMIC MAGNETIC FIELDS: FROM PLANETS, TO STARS AND GALAXIES | 2009年 / 259期

关键词：

Techniques: polarimetric; galaxies: evolution; galaxies: magnetic fields; radio continuum: galaxies;

D O I：

10.1017/S1743921309031512

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the cosmological evolution of large- and small-scale magnetic fields in galaxies at, high redshifts. Results from simulations of hierarchical structure formation cosmology provide a tool to develop an evolutionary model of regular magnetic fields coupled to galaxy formation and evolution. Turbulence in protogalactic halos generated by thermal virialization can drive an efficient turbulent dynamo. The mean-field dynamo theory is used to derive the timescales of amplification and ordering of regular magnetic fields in disk and dwarf galaxies. For future observations with the SKA, we predict an anticorrelation at fixed redshift between galaxy size and the, ratio between ordering scale and galaxy size. Undisturbed dwarf galaxies should host full,), coherent fields at z < 1, spiral galaxies at z < 0.5.

引用

页码：667 / +

页数：2

共 8 条

[1]

ARSHAKIAN TG, 2008, A A IN PRESS

[2]

Beck R, 2005, LECT NOTES PHYS, V664, P41, DOI 10.1007/3540313966_3

[3] Galactic magnetism: Recent developments and perspectives [J].

Beck, R ;

Brandenburg, A ;

Moss, D ;

Shukurov, A ;

Sokoloff, D .

ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1996, 34 :155-206

[4] Strong magnetic fields in normal galaxies at high redshift [J].

Bernet, Martin L. ;

Miniati, Francesco ;

Lilly, Simon J. ;

Kronberg, Philipp P. ;

Dessauges-Zavadsky, Miroslava .

NATURE, 2008, 454 (7202) :302-304

[5] The origin and evolution of cosmic magnetism [J].

Gaensler, BM ;

Beck, R ;

Feretti, L .

NEW ASTRONOMY REVIEWS, 2004, 48 (11-12) :1003-1012

[6] The star formation history of the Universe as revealed by deep radio observations [J].

Seymour, N. ;

Dwelly, T. ;

Moss, D. ;

McHardy, I. ;

Zoghbi, A. ;

Rieke, G. ;

Page, M. ;

Hopkins, A. ;

Loaring, N. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 386 (03) :1695-1708

[7]

Shukurov A, 2005, LECT NOTES PHYS, V664, P113, DOI 10.1007/3540313966_6

[8] From gas to galaxies [J].

van der Hulst, JM ;

Sadler, EM ;

Jackson, CA ;

Hunt, LK ;

Verheijen, M ;

van Gorkom, JH .

NEW ASTRONOMY REVIEWS, 2004, 48 (11-12) :1221-1237

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