Modeling repulsive gravity with creation

Vishwakarma, R. G.; Narlikar, Jayant V.

doi:10.1007/s12036-007-0003-9

Cited by 13 publications

(13 citation statements)

References 38 publications

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“…It is worthwhile to mention that the WMAP observations are also consistent with the decelerating model (please refer [45,46] and reference there in).…”

Section: Case Ii: Power Law Relation Between Displacement Field and Hmentioning

confidence: 76%

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A New Class of Bianchi Type-I Cosmological Models in Lyra Geometry

Singh

Kale²

2009

Int J Theor Phys

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“…It is worthwhile to mention that the WMAP observations are also consistent with the decelerating model (please refer [45,46] and reference there in).…”

Section: Case Ii: Power Law Relation Between Displacement Field and Hmentioning

confidence: 76%

“…The value of displacement field, energy density, pressure and bulk viscosity can be obtained using (22)-(24), (43)- (46), (49) and (50) as…”

Section: Cosmological Models With Variable Gravitational Constantmentioning

confidence: 99%

A New Class of Bianchi Type-I Cosmological Models in Lyra Geometry

Singh

Kale²

2009

Int J Theor Phys

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“…We do not make any additional assumption of minimal coupling (no interaction) between matter and dark energy (which anyway seems ad-hoc and nothing more than a simplifying assumption) and believe that interaction is more natural and is a fundamental principle (Vishwakarma and Narlikar 2007). This leads to…”

Section: Walker Metricmentioning

confidence: 99%

“…Although, the recent observations favour accelerating models at present but the possibility of decelerating models with small deceleration parameter are not completely ruled out. It has also been shown that the high redshift supernovae Ia can also be explained successfully in the decelerating models if one takes into account the absorption of light by the intergalactic metallic dust ejected from the supernovae explosions (Vishwakarma 2002(Vishwakarma , 2005. In view of this, in the next section we choose the value of β slightly greater than 1, so that the deceleration parameter will be very small close to zero as t → ∞.…”

Section: Models With γ =mentioning

confidence: 99%

Role of deceleration parameter and interacting dark energy in singularity avoidance

Abdussattar

Prajapati

2010

Astrophys Space Sci

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A class of non-singular bouncing FRW models are obtained by constraining the deceleration parameter in the presence of an interacting dark energy represented by a time-varying cosmological constant. The models being geometrically closed, initially accelerate for a certain period of time and decelerate thereafter and are also free from the entropy and cosmological constant problems. Taking a constant of integration equal to zero one particular model is discussed in some detail and the variation of different cosmological parameters are shown graphically for specific values of the parameters of the model. For some specific choice of the parameters of the model the ever expanding models of Ozer & Taha and Abdel-Rahman and the decelerating models of Berman and also the Einstein de-Sitter model may be obtained as special cases of this particular model.

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“…The best examples were : 1) Existence of atom 2) Existence of quantum of energy 3) Existence of integral nature of angular momentum 4) Existence of wave mechanics 5) Six quarks having fractional charge 6) Confirming the existence of muon/pion 7) Existence of Black holes 8) Black hole radiation 9) Einstein's cosmological Lambda term 10) Cosmic red shift 11) Discovery of CMBR 12) Accelerating universe and Dark energy [1][2][3][4][5][6][7][8][9][10][11]. The evidence for dark energy is only indirect and many things about the nature of dark energy remain matters of speculation.…”

Section: Introductionmentioning

confidence: 99%

To confirm the existence of Black hole cosmology

Uv¹,

Lakshminarayana

2013

International Journal of Advanced Astronomy

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It may be noted that, increased redshifts and increased distances forced Edwin Hubble to propose the Hubble's law. In fact there is no chance or scope or place for 'galaxy receding'. If it is possible to show that, (from the observer) older galaxy's distance increases with its 'age', then automatically the concepts 'galaxy receding' and 'accelerating universe' can be put for a revision at fundamental level. Its only our belief in its 'given' (Doppler shift based) unproven cosmological interpretation. Even then, merely by estimating galaxy distance and without measuring galaxy receding speed, one cannot verify its acceleration. Clearly speaking: two mistakes are happening here. 1) Assumed galaxy receding speed is not being measured and not being confirmed. 2) Without measuring and confirming the galaxy receding speed, how can one say and confirm that it (galaxy) is accelerating. It is really speculative and unfortunate also. During cosmic expansion, assuming past and present galaxies (which actually found to have gigantic structures) as 'points' and guessing photons coming from that galactic point particles seem to be ad-hoc. If light is coming from the atomic matter of the gigantic galaxy, then cosmic redshift can be interpreted as an index of the galactic atomic 'light emission mechanism'. In no way it seems to be connected with 'galaxy receding'. Whatever may be the expression, definitions of cosmic red shift seem to be ad-hoc and not absolute. Hence with redshift concept -one may not be able to understand the actual rate of cosmic expansion and actual cosmic geometry. Some cosmologists use the term 'Hubble volume' to refer to the volume of the observable universe. At any given time, the product of 'critical density' and 'Hubble volume' gives a characteristic cosmic mass and it can be called as the 'Hubble mass'. Interesting thing is that, Schwarzschild radius of the Hubble mass again matches with the Hubble length. Most of the cosmologists believe that this is merely a coincidence. If one is able to show its applications in different areas of fundamental physics, certainly it can be given more significance and superiority compared to the mysterious 'dark energy'. At any given cosmic time, 'Hubble length' can be considered as the gravitational or electromagnetic interaction range. Hubble volume and Hubble mass play a crucial role in quantum physics, nuclear physics, atomic physics and particle physics. If universe constitutes so many galaxies, if each galaxy constitutes a central fast growing and (light speed) spinning black hole and if black hole geometry is more intrinsic than its 'mass' and 'mass density', then considering universe as a 'growing and light speed rotating black hole' may not be far away from reality. By increasing the number of applications of Hubble mass and Hubble volume in other areas of fundamental physics, slowly and gradually and in a progressive way concepts of Black hole Cosmology can be strengthened and can also be confirmed. Unknowingly the fundamental physical laws are bein...

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Modeling repulsive gravity with creation

Cited by 13 publications

References 38 publications

A New Class of Bianchi Type-I Cosmological Models in Lyra Geometry

A New Class of Bianchi Type-I Cosmological Models in Lyra Geometry

Role of deceleration parameter and interacting dark energy in singularity avoidance

To confirm the existence of Black hole cosmology

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