33 citations · 149 across the 10 of their papers we have counts for
10 papers
Constraining Co-Varying Coupling Constants from Globular Cluster Age
Rajendra P. Gupta
Equations governing the evolution of a star involve multiple coupling constants. Thus, the time it spends as a main-sequence star can be expected to depend on whether or not such c…
Constraining Coupling Constants' Variation with Supernovae, Quasars, and GRBs
Rajendra P. Gupta
Dirac, in 1937 proposed the variation of coupling constants derived from his large number hypothesis. Efforts have continued since then to constrain their variation by various meth…
Measuring inertial mass with Kibble balance
Rajendra P. Gupta
A Kibble balance measures the mass (weight) of a test mass with extreme precision by balancing the gravitational pull on the test mass against the electromagnetic l…
Dynamical analysis of the covarying coupling constants in scalar-tensor gravity
Rodrigo R. Cuzinatto, Rajendra P. Gupta, Pedro J. Pompeia
A scalar-tensor theory of gravity is considered wherein the gravitational coupling and the speed of light are admitted as space-time functions and combine to form the defin…
Constraining variability of coupling constants with bright and extreme quasars
Rajendra P. Gupta
The 'extreme Population A (xA) quasars' approaching, sometimes exceeding the Eddington limit, are a type of quasars that could serve as a standard candle to measure distances too l…
Varying Coupling Constants and Their Interdependence
Rajendra P Gupta
Since Dirac predicted in 1937 possible variation of gravitational constant and other coupling constants from his large number hypothesis, efforts continue to determine such variati…
Effect of evolutionary physical constants on type-1a supernova luminosity
Rajendra P. Gupta
Type 1a supernovae, SNeIa, are used as standard candles in cosmology for determining the distances of the galaxies harboring them. We show that the luminosity of an SNIa depends on…
Varying physical constants and the lithium problem
Rajendra P. Gupta
We have used the recently published varying physical constants (VPC) approach to resolve the primordial lithium abundance problem. The value of the ratio of to hydrogen $7Li/…
Cosmology with relativistically varying physical constants
Rajendra P. Gupta
We have shown that the varying physical constant model is consistent with the recently published variational approach wherein Einstein equations are modified to include the variati…
SNe Ia Redshift in a Non-Adiabatic Universe
Rajendra P. Gupta
By relaxing the constraint of adiabatic universe used in most cosmological models, we have shown that the new approach provides a better fit to the supernovae Ia redshift data with…