CONSTRAINTS ON VARIABLE CHAPLYGIN GAS MODEL FROM TYPE IA SUPERNOVAE AND BARYON ACOUSTIC OSCILLATIONS
CONSTRAINTS ON VARIABLE CHAPLYGIN GAS MODEL FROM TYPE IA SUPERNOVAE AND BARYON ACOUSTIC OSCILLATIONS
复制标题
IA型超新星和重子声振荡对可变Chaplygin气体模型的约束
DOI：
10.1142/s0217732310032226
复制
发表时间：
2010-03
影响因子：
1.4
通讯作者：
Lu, Jianbo
中科院分区：
文献类型：
--
作者：
Xu, Lixin;Lu, Jianbo
We apply the type Ia supernovae union dataset and the baryon acoustic oscillations data at z = 0.2 and z = 0.35 to constrain variable Chaplygin gas (VCG) model as the unification of dark matter and dark energy. It is shown that the confidence levels for VCG model parameters are $B_{s}=0.075^{+0.016}_{-0.013}(1\sigma)$ $^{+0.026}_{-0.020}(2\sigma)$, $n=1.30^{+0.46}_{-0.49}(1\sigma)$ $^{+0.74}_{-0.81}(2\sigma)$. And it indicates that the values of transition redshift and current deceleration parameter are: $z_{T}=0.74^{+0.05}_{-0.05}(1\sigma)$, $q_{0}=-0.54^{+0.07}_{-0.07}(1\sigma)$. In addition, we plot the evolution trajectory of the VCG model in the statefinder parameter r–s plane and show the discrimination between this scenario and other dark energy models.
We apply the type Ia supernovae union dataset and the baryon acoustic oscillations data at z = 0.2 and z = 0.35 to constrain variable Chaplygin gas (VCG) model as the unification of dark matter and dark energy. It is shown that the confidence levels for VCG model parameters are $B_{s}=0.075^{+0.016}_{-0.013}(1\sigma)$ $^{+0.026}_{-0.020}(2\sigma)$, $n=1.30^{+0.46}_{-0.49}(1\sigma)$ $^{+0.74}_{-0.81}(2\sigma)$. And it indicates that the values of transition redshift and current deceleration parameter are: $z_{T}=0.74^{+0.05}_{-0.05}(1\sigma)$, $q_{0}=-0.54^{+0.07}_{-0.07}(1\sigma)$. In addition, we plot the evolution trajectory of the VCG model in the statefinder parameter r–s plane and show the discrimination between this scenario and other dark energy models.
登录
查看更多内容
DOI：
10.1046/j.1365-8711.2003.06508.x
发表时间：
2002-07
影响因子：
4.8
作者：
E. D. Pietro;J. Claeskens
通讯作者：
E. D. Pietro;J. Claeskens
影响因子：
4.4
作者：
Dvali, G;Gabadadze, G;Porrati, M
通讯作者：
Porrati, M
影响因子：
4.4
作者：
Li, M
通讯作者：
Li, M
影响因子：
4.4
作者：
M. Szydłowski;W. Godłowski
通讯作者：
M. Szydłowski;W. Godłowski
DOI：
10.1086/377226
发表时间：
2003-02
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
D. Spergel;L. Verde;H. Peiris;E. Komatsu;M. Nolta;C. Bennett;M. Halpern;G. Hinshaw;N. Jarosik-N.-Jar
通讯作者：
D. Spergel;L. Verde;H. Peiris;E. Komatsu;M. Nolta;C. Bennett;M. Halpern;G. Hinshaw;N. Jarosik-N.-Jar