Note on a well-known equation in cosmological perturbation theory which is in error

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.043525· OSTI ID:21420930

Hwang, Jai-chan; Park, Chan-Gyung ^[1]; Noh, Hyerim ^[2]

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1. Department of Astronomy and Atmospheric Sciences, Kyungpook National University, Taegu (Korea, Republic of)
2. Korea Astronomy and Space Science Institute, Daejon (Korea, Republic of)

We have a well-known equation in cosmological perturbation theory which appeared only by several simple algebraic errors made in many textbooks. There have been attempts to modify Newtonian equations aiming to reproduce that incorrect equation. We clarify why such attempts are wrong, present the correct equation to try in the modification, and explain its own limitation as well. We show that any form of density perturbation equation is possible by a suitable gauge condition.

• OSTI ID: 21420930
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevD.82.043525; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COSMOLOGICAL MODELS
DENSITY
DISTURBANCES
EQUATIONS
GAUGE INVARIANCE
MODIFICATIONS
PERTURBATION THEORY
INVARIANCE PRINCIPLES
MATHEMATICAL MODELS
PHYSICAL PROPERTIES