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| Paper IPM / P / 7885 |
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| Abstract: | |||||
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We present cosmological tests for a phenomenological parametrization of
quintessence model with time-varying equation of state on low, intermediate and
high redshift observations []. We study the sensitivity of the comoving
distance and volume element with the Alcock-Paczynski test to the time varying
model of dark energy. At the intermediate redshifts, Gold supernova Type Ia
data is used to fit the quintessence model to the observed distance modulus.
The value of the observed acoustic angular scale by WMAP experiment also is
compared with the model. The combined result of CMB and SNIa data confines
w=p/ρ to be more than −1.3 which can violate the dominant energy
condition.
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