753 citations
- Research Institute for Astronomy and Astrophysics of MaraghIR261 papers
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6 papers · 1 filter
NUT-Charged Black Holes in Gauss-Bonnet Gravity
M. H. Dehghani, R. B. Mann
We investigate the existence of Taub-NUT/bolt solutions in Gauss-Bonnet gravity and obtain the general form of these solutions in dimensions. We find that for all non-extremal…
Some necessary and sufficient conditions for Hypercyclicity Criterion
B Yousefi, H Rezaei
We give necessary and sufficient conditions for an operator on a separable Hilbert space to satisfy the hypercyclicity criterion.
Observational Constraints on the Role of the Crust in the Post-glitch Relaxation
M. Jahan-Miri
The observed large rates of spinning down after glitches in some radio pulsars have been previously explained in terms of a long-term spin-up behavior of a superfluid part of the c…
Scaling laws at the critical point
S. Davatolhagh
There are two independent critical exponents that describe the behavior of systems near their critical point. However, at the critical point only the exponent , which describes…
Thermodynamics of Asymptotically Flat Charged Black Holes in Third Order Lovelock Gravity
M. H. Dehghani, M. Shamirzaie
We present a new class of asymptotically flat charge static solutions in third order Lovelock gravity. These solutions present black hole solutions with two inner and outer event h…
Superfluid Spin-down, with Random Unpinning of the Vortices
M. Jahan-Miri
The so-called ``creeping'' motion of the pinned vortices in a rotating superfluid involves ``random unpinning'' and ``vortex motion'' as two physically separate processes. We argue…