Relativistic stars in f(r) gravity, and absence thereof

Tsutomu Kohayashi; Kei Ichi Maeda

Relativistic stars in f(r) gravity, and absence thereof

Tsutomu Kohayashi, Kei Ichi Maeda

School of Advanced Science and Engineering

Research output: Contribution to conference › Paper › peer-review

Abstract

Several f(R) modified gravity models have been proposed which realize the correct cosmological evolution and satisfy solar system and laboratory tests. Although non- relativist.ic stellar configurations can be constructed, we argue that relativistic stars cannot be present in such f(R) theories. This problem appears due to the dynamics of the effective scalar degree of freedom in the strong gravity regime. Our claim thus raises doubts on the viability of f(R) models.

Original language	English
Publication status	Published - 2008 Dec 1
Event	18th Workshop on General Relativity and Gravitation in Japan, JGRG 2008 - Higashi-Hiroshima, Japan Duration: 2008 Nov 17 → 2008 Nov 21

Conference

Conference	18th Workshop on General Relativity and Gravitation in Japan, JGRG 2008
Country/Territory	Japan
City	Higashi-Hiroshima
Period	08/11/17 → 08/11/21

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

Cite this

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title = "Relativistic stars in f(r) gravity, and absence thereof",

abstract = "Several f(R) modified gravity models have been proposed which realize the correct cosmological evolution and satisfy solar system and laboratory tests. Although non- relativist.ic stellar configurations can be constructed, we argue that relativistic stars cannot be present in such f(R) theories. This problem appears due to the dynamics of the effective scalar degree of freedom in the strong gravity regime. Our claim thus raises doubts on the viability of f(R) models.",

author = "Tsutomu Kohayashi and Maeda, {Kei Ichi}",

year = "2008",

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note = "18th Workshop on General Relativity and Gravitation in Japan, JGRG 2008 ; Conference date: 17-11-2008 Through 21-11-2008",

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T1 - Relativistic stars in f(r) gravity, and absence thereof

AU - Kohayashi, Tsutomu

AU - Maeda, Kei Ichi

PY - 2008/12/1

Y1 - 2008/12/1

N2 - Several f(R) modified gravity models have been proposed which realize the correct cosmological evolution and satisfy solar system and laboratory tests. Although non- relativist.ic stellar configurations can be constructed, we argue that relativistic stars cannot be present in such f(R) theories. This problem appears due to the dynamics of the effective scalar degree of freedom in the strong gravity regime. Our claim thus raises doubts on the viability of f(R) models.

AB - Several f(R) modified gravity models have been proposed which realize the correct cosmological evolution and satisfy solar system and laboratory tests. Although non- relativist.ic stellar configurations can be constructed, we argue that relativistic stars cannot be present in such f(R) theories. This problem appears due to the dynamics of the effective scalar degree of freedom in the strong gravity regime. Our claim thus raises doubts on the viability of f(R) models.

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M3 - Paper

AN - SCOPUS:84888164847

T2 - 18th Workshop on General Relativity and Gravitation in Japan, JGRG 2008

Y2 - 17 November 2008 through 21 November 2008

ER -

Relativistic stars in f(r) gravity, and absence thereof

Abstract

Conference

ASJC Scopus subject areas

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