Generic estimates for magnetic fields generated during inflation including Dirac-Born-Infeld theories

被引：40

作者：

Bamba, Kazuharu ^{[1
]}

Ohta, Nobuyoshi ^{[2
]}

Tsujikawa, Shinji ^{[3
]}

机构：

[1] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan

[2] Kinki Univ, Dept Phys, Osaka 5778502, Japan

[3] Tokyo Univ Sci, Fac Sci, Dept Phys, Shinjuku Ku, Tokyo 1628601, Japan

来源：

PHYSICAL REVIEW D | 2008年 / 78卷 / 04期

关键词：

D O I：

10.1103/PhysRevD.78.043524

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We estimate the strength of large-scale magnetic fields produced during inflation in the framework of Dirac-Born-Infeld (DBI) theories. This analysis is sufficiently general in the sense that it covers most of conformal symmetry breaking theories in which the electromagnetic field is coupled to a scalar field. In DBI theories there is an additional factor associated with the speed of sound, which allows a possibility to lead to an extra amplification of the magnetic field in a ultrarelativistic region. We clarify the conditions under which seed magnetic fields to feed the galactic dynamo mechanism at a decoupling epoch as well as present magnetic fields on galactic scales are Sufficiently generated to satisfy observational bounds.

引用

页数：7

共 104 条

[1] Large N field theories, string theory and gravity [J].

Aharony, O ;

Gubser, SS ;

Maldacena, J ;

Ooguri, H ;

Oz, Y .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2000, 323 (3-4) :183-386

[2] Generation of large scale magnetic fields by coupling to curvature and dilaton field [J].

Akhtari-Zavareh, A. ;

Hojati, A. ;

Mirza, B. .

PROGRESS OF THEORETICAL PHYSICS, 2007, 117 (05) :803-822

[3] DBI in the sky: Non-Gaussianity from inflation with a speed limit [J].

Alishahiha, M ;

Silverstein, E ;

Tong, D .

PHYSICAL REVIEW D, 2004, 70 (12) :15

[4] N-flationary magnetic fields [J].

Anber, Mohamed M. ;

Sorbo, Lorenzo .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2006, (10)

[5] Generation of cosmological seed magnetic fields from inflation with cutoff [J].

Ashoorioon, A ;

Mann, RB .

PHYSICAL REVIEW D, 2005, 71 (10)

[6] Large-scale magnetic fields from dilaton inflation in noncommutative spacetime [J].

Bamba, K ;

Yokoyama, J .

PHYSICAL REVIEW D, 2004, 70 (08)

[7] Large-scale magnetic fields from inflation in dilaton electromagnetism [J].

Bamba, K ;

Yokoyama, J .

PHYSICAL REVIEW D, 2004, 69 (04)

[8] Large-scale magnetic fields in the inflationary universe [J].

Bamba, Kazuharu ;

Sasaki, Misao .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2007, (02)

[9] The interrelation between the generation of large-scale electric fields and that of large-scale magnetic fields during inflation [J].

Bamba, Kazuharu .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2007, (10)

[10] Inflation and late-time cosmic acceleration in non-minimal Maxwell- F(R) gravity and the generation of large-scale magnetic fields [J].

Bamba, Kazuharu ;

Odintsov, Sergei D. .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2008, (04)

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