scholarly journals Whence the pulses?

1996 ◽  
Vol 160 ◽  
pp. 139-146 ◽  
Author(s):  
D.B. Melrose
Keyword(s):  
Radio Emission ◽  
Pair Production ◽  
Emission Mechanism ◽  
Maser Emission ◽  
Light Cylinder

AbstractRadio emission mechanisms for pulsars are reviewed with emphasis on five possible sites for the emission: the pair production front (PPF), two regions in the relativistically outflowing plasma (denoted ROP1 and ROP2) between the PPF and the light cylinder (LC), and two sited near the LC. Several maser emission mechanism are viable for ROP1, where radius-to-frequency mapping applies. Suggested Schott radiation from outside the LC is discussed critically.

scholarly journals Closing Comments: Observations

1992 ◽  
Vol 128 ◽  
pp. 410-411 ◽  
Author(s):  
P. M. McCulloch
Keyword(s):  
Radio Emission ◽  
Polar Region ◽  
Full Range ◽  
Emission Mechanism ◽  
General Consensus ◽  
Areas Of Interest

During the course of this colloquium many papers have been presented on observational aspects of pulsar astronomy. In the following discussion I have not attempted to be comprehensive but have selected a number of areas of interest to me.The basic pulsar properties appear to be consistent over the full range of pulsar periods from 1 ms to 4s, implying that the emission mechanism is the same for all pulsars. There was a general consensus among the observers that the radio emission occurs low down in the pulsar's magnetosphere above the magnetic polar region.

scholarly journals The Energy Emission of Sheets in the The Pulsar Magnetosphere

1992 ◽  
Vol 128 ◽  
pp. 114-116
Author(s):  
Tong Yi ◽  
Li Zhong Yuan
Keyword(s):  
Relativistic Effect ◽  
Emission Mechanism ◽  
Pulsar Magnetosphere ◽  
Current Sheets ◽  
Light Cylinder ◽  
Energy Emission

AbstractWe present a possible emission mechanism based on the idea of current sheets in magnetohydrodynamice. The current sheets are formed close to the light cylinder due to a relativistic effect involving partly frozen-in particles. We estimate that the energy emitted by the current sheets fits the observations fairly well.

scholarly journals Organised polarisation variability in radio pulsars and consequences for emission theory

2017 ◽  
Vol 13 (S337) ◽  
pp. 79-82
Author(s):  
Cristina-Diana Ilie ◽  
Patrick Weltevrede
Keyword(s):  
Radio Emission ◽  
Single Pulse ◽  
Position Angle ◽  
Emission Mechanism ◽  
Radio Pulsars ◽  
High Quality ◽  
Special Cases ◽  
High Quality Sample ◽  
Linear Polarisation ◽  
Periodic Switching

AbstractThe aim of this work is to explore the connection between variability in single pulse intensity and periodic switching of the position angle (PA) of the linear polarisation and how this relates to the radio emission mechanism. There are five pulsars reported in the literature for which the PA is seen to periodically change in tandem with the variability in their pulse shapes. This behaviour is seemingly incompatible with two well established models of the radio emission mechanism. The purpose of this study is to investigate in a systematic way whether this phenomenon is common or if only happens in special cases, using a high-quality sample of pulsar data observed with the Parkes telescope. We show that the connection between polarisation variability and intensity variability is more common than previously expected.

A model of the radio emission mechanism in pulsars

1977 ◽  
Vol 217 ◽  
pp. 832 ◽  
Author(s):  
K. Kawamura ◽  
I. Suzuki
Keyword(s):  
Radio Emission ◽  
Emission Mechanism

scholarly journals Resolution of the PSR 1919+21 Magnetosphere Emitting Region

1992 ◽  
Vol 128 ◽  
pp. 287-289
Author(s):  
O. A. Kuz'min
Keyword(s):  
Radio Emission ◽  
Regular Structure ◽  
Phase Changes ◽  
Scintillation Spectrum ◽  
Radio Scintillation ◽  
Light Cylinder ◽  
Average Profile

AbstractRegular structure with 10 to 50kHz-scale was detected in the radio scintillation spectrum of PSR 1919+21. This regular structure may be a simple interferometric pattern formed by refractive multi-ray propagation between the pulsar and observer. It was found that the pulsar PSR 1919+21 radio emission scintillation spectrum phase changes significantly across the average profile. Within the refractive scattering scenario this phase-longitude dependence corresponds to a transversal shift of the magnetosphere emitting region of about 6 x 108 cm. The radio emission altitude is estimated to be near the light cylinder.

scholarly journals Radio Radiation Characteristics of Pulsars and Magnetic Dipole Angle

1981 ◽  
Vol 95 ◽  
pp. 217-218 ◽  
Author(s):  
Wang Zhen-ru ◽  
Chu Yi
Keyword(s):  
Radio Emission ◽  
Magnetic Dipole ◽  
Emission Region ◽  
Radio Radiation ◽  
Emission Mechanism ◽  
Pulsar Magnetosphere ◽  
Radiation Characteristics ◽  
Empirical Relations ◽  
Set Up

The structure of the pulsar magnetosphere, the location of the radio emission region and the radio emission mechanism are important theoretical subjects in the research of pulsars. There may be close relations between these subjects. Nevertheless, it should be possible to set up some empirical relations among them which can be considered as a foundation for studying these important subjects. In this paper some of these relations are studied.

scholarly journals Microstructure and the Pulsar Radio Emission Mechanism

1992 ◽  
Vol 128 ◽  
pp. 343-346
Author(s):  
Valentín Boriakoff
Keyword(s):  
Radio Emission ◽  
Radio Pulse ◽  
Emission Mechanism ◽  
Pulsar Radio ◽  
Pulsar Radio Emission

AbstractThe properties of pulsar radio pulse microstructure are reviewed, then consideration is given on how, in the frame of the Ruderman-Sutherland pulsar model, an emission mechanism can be devised which explains many of the known characteristics of micropulses and of subpulses.

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