The effect of applying external pressure fluctuations on slender flux tubes is studied as a nonlinear initial value problem. It is shown that persistent nonlinear resonant response to pressure fluctuations is possible for ...
Banyal, R. K; Prasad, B. R(Indian Academy of Sciences, 2010-06)
The nonlinear response of light transmission
characteristics of a liquid crystal (LC) spatial light modulator
(SLM) is studied. The results show that the device exhibits a wide
range of variations with different ...
Hagyard, M. J; Venkatakrishnan, P; Smith, J. B. Jr(American Astronomical Society, 1990-06)
The relation between the degree of nonpotentiality of photospheric magnetic fields and the occurrence of gama-ray flares is examined to determine whether there are special signatures of the stressed fields for this type ...
Decay of the inflaton or moduli which dominated the energy density of the universe at early times leads to a matter to radiation transition epoch. We consider nonthermal sterile dark matter (DM) particles produced as decay ...
The
Λ
CDM
prediction of
S
8
≡
σ
8
(
Ω
m
/
0.3
)
0.5
—where
σ
8
is the root mean square of matter fluctuations on an
8
h
−
1
Mpc
scale—once calibrated on Planck cosmic microwave ...
We present small-scale structure constraints on sterile dark matter produced from a heavy mediator particle, inspired by models of moduli decay. Dark matter particles produced through this mechanism can contribute to the ...
Niwas, S; Gupta, P. K; Gaur, V. K(Indian Academy of Sciences, 2005-10)
This paper investigates the performance of normalized response function obtained by normalizing the Cagniard impedance function by a suitable factor and then rotating the phase by 45 ◦to make it purely real for homogeneous ...
Using Greenwich and Solar Optical Observing Network sunspot group data obtained during the period 1874-2005, we find that the sums of the areas of the sunspot groups in the 0°-10° latitude-interval of the Sun's northern ...
Iijima, T; Gehrz, R. D; Jones, T. J; Lawrence, G; Sivaraman, K. R; Prabhu, T. P; Ghosh, K. K; Anupama, G. C; Selvakumar, G(Smithsonian Astrophysical Observatory, 1991-04)
Kamath, U. S; Ashok, N. M; Anupama, G. C(Astronomical Society of India, 2008-12)
We present near-infrared and optical spectra of the fast nova V4444 Sagittarii at two single epochs in the early decline phase and unfiltered images obtained in quiescence. Based on this and other available data, we discuss ...
Nagabhushana, S; Nagesh, Suresh; Prasad, B. R(World Scientific, 2021-06)
There is a continuous need to enhance the aperture size of telescopes by astronomers to explore the space
much deeper by getting better resolutions and high image quality. Supporting large optics and maintaining
high ...
Akanksha, K; Pravabati, C; Appleby, S; Park, C(IOP Publishing, 2018-10)
We employ the rank-2 contour Minkowski tensor in two dimensions to probe length and time scales of ionized bubbles during the epoch of reionization. We demonstrate that ionized bubbles are not circular, and hence not ...