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44 papers · 1 filter
Einstein's equations as a thermodynamic identity: The cases of stationary axisymmetric horizons and evolving spherically symmetric horizons
Dawood Kothawala, Sudipta Sarkar, T. Padmanabhan
There is an intriguing analogy between the gravitational dynamics of the horizons and thermodynamics. In case of general relativity, as well as for a wider class of Lanczos-Loveloc…
Mach's Holographic Principle
Justin Khoury, Maulik Parikh
Mach's principle is the concept that inertial frames are determined by matter. We propose and implement a precise formulation of Mach's principle in which matter and geometry are i…
Behaviour of the and potential strengths in the He hypernucleus
A. A. Usmani, F. C. Khanna
Variational study of He hypernucleus is presented using a realistic Hamiltonian and a fully correlated wave function including space-exchange correlation. Behaviour of t…
Galactic dynamos supported by magnetic helicity fluxes
Sharanya Sur, Anvar Shukurov, Kandaswamy Subramanian
We present a simple semi-analytical model of nonlinear, mean-field galactic dynamos and use it to study the effects of various magnetic helicity fluxes. The dynamo equations are re…
Probing the star formation history using the redshift evolution of luminosity functions
Saumyadip Samui, Raghunathan Srianand, Kandaswamy Subramanian
We present a self-consistent, semi-analytical LCDM model of star formation and reionization. For the cosmological parameters favored by the WMAP data, our models consistently repro…
Accretion Disk Spectra of the Brightest Ultra-luminous X-ray Source in M82
Feng Yuan, Ronald E. Taam R. Misra, Xue-Bing Wu +1
Emission spectra of hot accretion disks characteristic of advection dominated accretion flow (ADAF) models are investigated for comparison with the brightest ultra-luminous source,…