Kantowski-Sachs viscous fluid cosmological model with a varying Lambda

被引：0
作者：
Kandalkar, S. P. [1 ]
Khade, P. P. [1 ]
Gawande, S. P. [1 ]
机构：
[1] Govt Vidarbha Inst Sci & Humanities, Dept Math, Amravati 444604, India
来源：
TURKISH JOURNAL OF PHYSICS | 2009年 / 33卷 / 03期
关键词：
Kantowski-Sachs viscous fluid model; cosmology; variable cosmological constant;
D O I：
10.3906/fiz-0810
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the Kantowski-Sachs cosmological model filled with viscous fluid in the presence of cosmological term.. To get a deterministic solution, a condition between metric potentials is used. The viscous coefficient of bulk viscous fluid is assumed to be a power function of mass density, whereas coefficient of shear viscosity is considered proportional to scale of expansion in the model. It is found that the cosmological constant. is positive and is a decreasing function of time, which is supported by results from recent supernova observations. Some physical and geometrical properties of the models are also discussed.
引用
收藏
页码：155 / 165
页数：11
相关论文
共 47 条
  • [1] Bianchi Type-IX viscous fluid cosmological model in general relativity
    Bali, R
    Yadav, MK
    [J]. PRAMANA-JOURNAL OF PHYSICS, 2005, 64 (02): : 187 - 196
  • [2] Perfect fluid LRS Bianchi I with time varying constants
    Belinchon, J. A.
    [J]. ASTROPHYSICS AND SPACE SCIENCE, 2006, 302 (1-4) : 161 - 170
  • [3] Belinski V. A., 1975, SOV PHYS JETP, V69, P401
  • [4] Bianchi type I cosmological model with variable Δ-term
    Chakravarty, Nabajit
    Biswas, Lalit
    [J]. ASTROPHYSICS AND SPACE SCIENCE, 2007, 312 (1-2) : 13 - 15
  • [5] NOTE ON KANTOWSKI-SACHS UNIVERSES
    DABROWSKI, MP
    [J]. JOURNAL OF MATHEMATICAL PHYSICS, 1995, 36 (06) : 2985 - 2987
  • [6] Cosmological models with bulk viscosity in the presence of particle creation
    Desikan, K
    [J]. GENERAL RELATIVITY AND GRAVITATION, 1997, 29 (04) : 435 - 443
  • [7] Constraints on cosmological models from Hubble Space Telescope observations of high-z supernovae
    Garnavich, PM
    Kirshner, RP
    Challis, P
    Tonry, J
    Gilliland, RL
    Smith, RC
    Clocchiatti, A
    Diercks, A
    Filippenko, AV
    Hamuy, M
    Hogan, CJ
    Leibundgut, B
    Phillips, MM
    Reiss, D
    Riess, AG
    Schmidt, BP
    Schommer, RA
    Spyromilio, J
    Stubbs, C
    Suntzeff, NB
    Wells, L
    [J]. ASTROPHYSICAL JOURNAL, 1998, 493 (02) : L53 - +
  • [8] Supernova limits on the cosmic equation of state
    Garnavich, PM
    Jha, S
    Challis, P
    Clocchiatti, A
    Diercks, A
    Filippenko, AV
    Gilliland, RL
    Hogan, CJ
    Kirshner, RP
    Leibundgut, B
    Phillips, MM
    Reiss, D
    Riess, AG
    Schmidt, BP
    Schommer, RA
    Smith, RC
    Spyromilio, J
    Stubbs, C
    Suntzeff, NB
    Tonry, J
    Carroll, SM
    [J]. ASTROPHYSICAL JOURNAL, 1998, 509 (01) : 74 - 79
  • [9] Higher dimensional dust collapse with a cosmological constant
    Ghosh, S. G.
    Deshkar, D. W.
    [J]. ASTROPHYSICS AND SPACE SCIENCE, 2007, 310 (1-2) : 111 - 117
  • [10] TRANSITION OF A KANTOWSKI SACHS COSMOLOGICAL MODEL INTO AN INFLATIONARY ERA
    GRON, O
    [J]. JOURNAL OF MATHEMATICAL PHYSICS, 1986, 27 (05) : 1490 - 1491
12345