Bianchi-IX string cosmological model in Lyra geometry

Rahaman, Farook; Chakraborty, Subenoy; Begum, Naheed; Hossain, Md. Wali; Kalam, Mehedi

doi:10.1007/bf02704282

Cited by 43 publications

(35 citation statements)

References 22 publications

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“…Recently , , Yadav et al (2007aYadav et al ( , 2007b, Banerjee et al (1990), Rahaman et al (2002Rahaman et al ( , 2003, Ram and Singh (1995), Singh and Singh (1999), Tikkekar and Patel (1992), Reddy (2003aReddy ( , 2003b, Pradhan et al (2007), Baysal et al (2001), Carminati and McIntosh (1980), Katore and Rane (2006), Bali and Anjali (2006), Saha and Visinescu (2008) have studied string cloud cosmology. String cosmologies with bulk viscosity have been studied by Wang (2004Wang ( , 2005Wang ( , 2006 and .…”

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confidence: 96%

String fluid cosmological models in general relativity

Tripathy

Nayak²,

Sahu

et al. 2008

Astrophys Space Sci

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LRS Bianchi type-I string cosmological models are studied in the frame work of general relativity when the source for the energy momentum tensor is a bulk viscous fluid containing one dimensional strings embedded in electromagnetic field. A barotropic equation of state for the pressure and density is assumed to get determinate solutions of the field equations. The bulk viscosity is assumed to be inversely proportional to the scalar expansion. The physical and kinematical properties of the models are discussed. The effect of viscosity and electromagnetic field on the physical and kinematical properties is also investigated.

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confidence: 96%

String fluid cosmological models in general relativity

Tripathy

Nayak²,

Sahu

et al. 2008

Astrophys Space Sci

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“…where we have assumed 8πG = c = 1 also φ is the displacement vector and the other are components of the Riemannian geometry [47], [48]. Also, in this study for (n + 2) dimensional flat FRW metric, time-like displacement field vector is defined by [49] φ i = (β(t), 0, 0, 0...0)…”

Section: Strange Quark Matter Attached To String Cloud Solutions In Lmentioning

confidence: 99%

Higher Dimensional Topological Defect Solutions with Quark Matter in Gravitation Theories

Çag̃lar¹,

Aygün²

2017

AdAp

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In this paper we have researched higher dimensional flat Friedmann-Robertson-Walker (FRW) cosmological model solutions for string cloud and domain walls coupled with quark and strange quark matters in Lyra and Riemann geometries. We have obtained that string tension density is zero in Lyra and Riemann geometries. Also, the displacement field vector behaves like a cosmological constant in our models. In addition to these, some physical and kinematical quantities have been generalized and discussed in Lyra and Riemann geometries. Also our results are consistent with the results of Yılmaz, Back et al. and Adcox et al. in four dimensions.

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“…Sen (2000), Barros et al (2001), Sen et al (1997), Gundalach and Ortiz (1990), Barros and Romero (1995), Bhattacharjee and Baruah (2001), Rahaman et al (2003) and Reddy (2005) have presented string cosmological models in alternative theories of gravitation. In particular, Reddy (2003aReddy ( , 2006 and have discussed some string cosmological models in Saez-Ballester scalar-tensor theory of gravitation in four dimensions.…”

Section: Introductionmentioning

confidence: 96%