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Prog. Theor. Phys. Vol. 106 No. 5 (2001) pp. 929-939

[ Full Text PDF : FREE ACCESS (238K) ]

Analyses of Type Ia Supernova Data in Cosmological Models with a Local Void

Kenji Tomita*

Yukawa Institute for Theoretical Physics, Kyoto University,
Kyoto 606-8502, Japan

(Received August 3, 2001)

Abstract:

The data for type Ia supernovae obtained by the High-z SN Search Team and Supernova Cosmology Project are analyzed using inhomogeneous cosmological models with a local void on scales of about 200 Mpc, to derive the best-fit values of model parameters and the confidence contours. The χ2 fitting is found to be slightly better than that in homogeneous models. It is shown that (1) the best-fit values are most sensitive to the ratio R of the outer Hubble constant, H0 II, to the inner Hubble constant, H0 I, (2) the best-fit outer density parameter, Ω0 II, and cosmological constant parameter, λ0 II, are, respectively, increasing and decreasing functions of R, and (3) (Ω0 II, λ0 II) can be (1, 0) for R ≈0.8. Moreover, it is shown that these models are naturally consistent with the new supernova data (SN1997ff) with z = 1.7.


URL : http://ptp.ipap.jp/link?PTP/106/929/
DOI : 10.1143/PTP.106.929


*E-mail: tomita@yukawa.kyoto-u.ac.jp

[ Full Text PDF : FREE ACCESS (238K) ] Citation:

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Citing Article(s) :

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  5. Progress of Theoretical Physics Vol. 117 No. 6 (2007) pp. 1067-1075 :
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  6. Progress of Theoretical Physics Vol. 120 No. 5 (2008) pp. 937-960 :
    Solving the Inverse Problem with Inhomogeneous Universes
    Chul-Moon Yoo, Tomohiro Kai and Ken-ichi Nakao

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