Cosmic Microwave Background Radiation Constraints on a Modified Chaplygin Gas Model

Chin. Phys. Lett.

2005, Vol. 22

Issue (7): 1600-1603 DOI:

Original Articles

Cosmic Microwave Background Radiation Constraints on a Modified Chaplygin Gas Model

LIU Dao-Jun;LI Xin-Zhou

Shanghai United Center for Astrophysics (SUCA), Shanghai Normal University, Shanghai 200234

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LIU Dao-Jun, LI Xin-Zhou 2005 Chin. Phys. Lett. 22 1600-1603

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Abstract A modified Chaplygin gas model of unifying dark energy and dark matter with the exotic equation of state p=Bρ-A/ρ^α, which can also explain the recent expansion of the universe, is investigated by means of constraining the location of the peak of the cosmic microwave background radiation spectrum. We find that the result of CMBR measurements does not exclude the nonzero value of parameter B, but allows it in the range -0.35≤B≤0.025.

Keywords: 04.40.Dg 98.80.Jk 98.30.Es

Published: 01 July 2005

PACS:	04.40.Dg	(Relativistic stars: structure, stability, and oscillations)
	98.80.Jk	(Mathematical and relativistic aspects of cosmology)
	98.30.Es

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2005/V22/I7/01600

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