220 citations · 904 across the 41 of their papers we have counts for
4 papers · 1 filter
Discovery of a red quasar with recurrent activity
S. Nandi, R. Roy, D. J. Saikia +6
We report a new double-double radio quasar, DDRQ, J07464526 which exhibits two cycles of episodic activity. From radio continuum observations at 607 MHz using the GMRT and 1400…
Intranight Optical Variability of Radio-Quiet Weak Emission Line Quasars-II
Hum Chand, Parveen Kumar, Gopal-Krishna
This is continuation of our search for the elusive radio-quiet blazars, by carrying out a systematic programme to detect intranight optical variability (INOV) in a subset of `Weak-…
An exposition on Friedmann Cosmology with Negative Energy Densities
Robert J. Nemiroff, Ravi Joshi, Bijunath R. Patla
How would negative energy density affect a classic Friedmann cosmology? Although never measured and possibly unphysical, certain realizations of quantum field theories leaves the d…
C IV absorption line variability in X-ray bright BALQSOs
Ravi Joshi, Hum Chand, Raghunathan Srianand +1
We report kinematic shift and strength variability of C IV broad absorption line (BAL) trough in two high-ionization X-ray bright QSOs SDSS J085551+375752 (at zem ~ 1.936) and SDSS…