61 citations · 108 across the 7 of their papers we have counts for
7 papers
Reissner-Nordstrom black hole in dark energy background
Ngangbam Ishwarchandra, Ng. Ibohal, K. Yugindro Singh
In this paper we propose a stationary solution of Einstein's field equations describing Reissner-Nordstrom black hole in dark energy background. It is to be regarded as the Reissne…
Schwarzschild black hole in dark energy background
Ngangbam Ishwarchandra, Ng. Ibohal, K. Yugindro Singh
In this paper we present an exact solution of Einstein's field equations describing the Schwarzschild black hole in dark energy background. It is also regarded as an embedded solut…
Rotating dark matter solution admitting dark fluid
Ng. Ibohal, Ngangbam Ishwarchandra, K. Yugindro Singh
In this paper we present an exact solution of Einstein's fields equations describing dark matter possessing dark energy with negative pressure and energy equation of state paramete…
Non-vacum conformally flat space-times: dark energy
Ng. Ibohal, Ngangbam Ishwarchandra, K. Yugindro Singh
In this paper we propose a class of exact solutions (stationary and non-stationary) of Einstein's field equations. The energy-momentum tensors of the solutions describe dark energy…
The spectral and temporal properties of an Ultra-Luminous X-ray source in NGC 6946
A. Senorita Devi, R. Misra, K. Shanthi +1
We report variability of the X-ray source, X-7, in NGC 6946, during a 60 ksec Chandra observation when the count rate decreased by a factor of ~1.5 in ~5000 secs. Spectral fitting…
The dependence of the estimated luminosities of ULX on spectral models
A. Senorita Devi, R. Misra, V. K. Agrawal +1
Data from {\it Chandra} observations of thirty nearby galaxies were analyzed and 365 X-ray point sources were chosen whose spectra were not contaminated by excessive diffuse emissi…
New Measurements of Orbital Period Change in Cygnus X-3
N. S. Singh, S. Naik, B. Paul +3
A nonlinear nature of the binary ephemeris of Cygnus X-3 indicates either a change in the orbital period or an apsidal motion of the orbit. We have made extended observations of Cy…