Nonlinear low frequency electrostatic structures in a magnetized two-component auroral plasma

2016 ◽  
Vol 23 (3) ◽  
pp. 032309 ◽  
Author(s):  
O. R. Rufai ◽  
R. Bharuthram ◽  
S. V. Singh ◽  
G. S. Lakhina
Keyword(s):  
Low Frequency ◽  
Auroral Plasma ◽  
Two Component

scholarly journals Inference on accretion flow properties of XTE J1752-223 during its 2009-10 outburst

2020 ◽  
Vol 493 (2) ◽  
pp. 2452-2462 ◽  
Author(s):  
Kaushik Chatterjee ◽  
Dipak Debnath ◽  
Debjit Chatterjee ◽  
Arghajit Jana ◽  
Sandip K Chakrabarti
Keyword(s):  
Black Hole ◽  
Spectral Analysis ◽  
Low Frequency ◽  
Power Law Model ◽  
Flow Properties ◽  
Advective Flow ◽  
Black Hole Candidate ◽  
Two Component ◽  
Timing Properties ◽  
Spectral States

ABSTRACT Spectral and timing properties of the stellar-mass black hole candidate XTE J1752-223 during its 2009-10 outburst are studied using RXTE PCA data in the 2.5–25 keV energy range. Low frequency quasi-periodic oscillations are seen during outburst. The spectral analysis is done using two types of models: one is the combined disc blackbody plus power-law model and the other is Transonic flow solution based Two Component Advective Flow (TCAF) model. Light-curve profiles and evolution of hardness ratios are studied using MAXI GSC and Swift BAT data. Based on the evolution of the temporal and the spectral properties, we find that the object evolved through the following spectral states: hard, hard-intermediate, and soft-intermediate/soft. From the TCAF model fitted spectral analysis, we also estimate the probable mass of the black hole in the range of 8.1−11.9 M⊙, and more precisely, the mass appears to be 10 ± 1.9 M⊙.

Low Frequency Nonlinear Waves in the Auroral Plasma

2001 ◽  
Vol T98 (1) ◽  
pp. 137 ◽  
Author(s):  
R. Bharuthram ◽  
R. V. Reddy ◽  
G. S. Lakhina ◽  
N. Singh
Keyword(s):  
Nonlinear Waves ◽  
Low Frequency ◽  
Auroral Plasma

scholarly journals Low-frequency Profiles of the Crab Pulsar

2002 ◽  
Vol 199 ◽  
pp. 379-380
Author(s):  
Arkady Kuzmin
Keyword(s):  
Low Frequency ◽  
Main Pulse ◽  
Crab Pulsar ◽  
Component Structure ◽  
Two Component ◽  
Interstellar Scattering

Integrated profiles of the Crab pulsar at frequencies 102, 111, 127, 147, and 196 MHz compensated for the interstellar scattering are presented. Observed profiles were compensated for interstellar scattering and intrinsic pulsar profiles were restored. The component structure and their frequency evolution was analyzed. The main pulse is two-component and a so-called precursor is its first component. The interpulse have two components too.

scholarly journals Parallel electric field structures associated with the low-frequency oscillations in the auroral plasma

2006 ◽  
Vol 58 (9) ◽  
pp. 1227-1232 ◽  
Author(s):  
R. V. Reddy ◽  
S. V. Singh ◽  
G. S. Lakhina ◽  
R. Bharuthram
Keyword(s):  
Electric Field ◽  
Low Frequency ◽  
Parallel Electric Field ◽  
Low Frequency Oscillations ◽  
Auroral Plasma

A Two-Component Electromagnetic Ship's Log

1970 ◽  
Vol 23 (03) ◽  
pp. 302-316 ◽  
Author(s):  
M. J. Tucker ◽  
N. D. Smith ◽  
F. E. Pierce ◽  
E. P. Collins
Keyword(s):  
Electromagnetic Induction ◽  
Low Frequency ◽  
Vertical Axis ◽  
Water Velocity ◽  
Forward Speed ◽  
Electronic Circuits ◽  
Measuring Head ◽  
Usual Procedure ◽  
Two Component

A ship's log is described which works on the principle of electromagnetic induction. The measuring head contains a coil with a vertical axis and is arranged so that voltages are picked up proportional to the two components of water flow past it. The electronic circuits are designed to give a true and stable zero by using a low-frequency squarewave energizing current. Laboratory tests show the output to be linearly related to water velocity. Because of the complicated flow patterns round a ship, the log must be calibratedin situat sea. Calibration of the forward component meter follows the usual procedure and this meter is accurate to about ±0·1 knot or ± 1 per cent, whichever is greater. However, calibration of the athwartship component meter is difficult and time-consuming, and the sensitivity is dependent on forward speed. With care, it seems that an accuracy of ±0·2 knot or ± 10 per cent, whichever is greater, should be possible with this meter, but more experience of such calibrations is required. The paper is discussed on p. 319.

Canadian Measurements of Project SANGUINE Test Transmissions

1974 ◽  
Vol 11 (6) ◽  
pp. 755-767 ◽  
Author(s):  
R. F. Sturrock ◽  
J. A. Shand ◽  
J. E. Lokken
Keyword(s):  
Magnetic Field ◽  
Low Frequency ◽  
Extremely Low Frequency ◽  
Two Component

A method of predicting, to continental ranges, both the radial and tangential magnetic field intensities of extremely low frequency transmissions has been developed and confirmed by measurement. At the test frequencies, 45 and 75 Hz, the two component intensities are comparable over distances exceeding 1000 km.

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