Physics of the Pulsar Magnetosphere PDF Download
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Author: V. S. Beskin
Publisher: Cambridge University Press
ISBN: 9780521417464
Category : Science
Languages : en
Pages : 186
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Book Description
This book presents the theory of the electrodynamic phenomena that occur in the magnetosphere of a pulsar. It also provides a clear picture of the formation and evolution of neutron stars. The authors address the basic physical processes of electron-positron plasma production, the generation of electric fields and currents, and the emission of radio waves and gamma rays. The book also reviews the current observational data, and devotes a complete chapter to a detailed comparison of this data with accepted theory and with some recent theoretical predictions. Tables containing the values of the physical parameters of all observed radio pulsars are also provided.
Author: V. S. Beskin
Publisher: Cambridge University Press
ISBN: 9780521417464
Category : Science
Languages : en
Pages : 186
Get Book Here
Book Description
This book presents the theory of the electrodynamic phenomena that occur in the magnetosphere of a pulsar. It also provides a clear picture of the formation and evolution of neutron stars. The authors address the basic physical processes of electron-positron plasma production, the generation of electric fields and currents, and the emission of radio waves and gamma rays. The book also reviews the current observational data, and devotes a complete chapter to a detailed comparison of this data with accepted theory and with some recent theoretical predictions. Tables containing the values of the physical parameters of all observed radio pulsars are also provided.
Author: David Hall Roberts
Publisher:
ISBN:
Category : Pulsars
Languages : en
Pages : 266
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Book Description
Author: David Hall Roberts
Publisher:
ISBN:
Category : Pulsars
Languages : en
Pages : 266
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Book Description
Author: International Astronomical Union. Colloquium
Publisher:
ISBN: 9788300035960
Category : Magnetosphere
Languages : en
Pages : 434
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Book Description
Author: Derek Harry Roberts
Publisher:
ISBN:
Category : Pulsars
Languages : en
Pages : 78
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Book Description
Author: D. H. Roberts
Publisher:
ISBN:
Category : Magnetosphere
Languages : en
Pages : 30
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
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Book Description
I survey recent theoretical work on the structure of the magnetospheres of rotation powered pulsars, within the observational constraints set by their observed spindown, their ability to power synchrotron nebulae and their ability to produce beamed collective radio emission, while putting only a small fraction of their energy into incoherent X- and gamma radiation. I find no single theory has yet given a consistent description of the magnetosphere, but I conclude that models based on a dense outflow of pairs from the polar caps, permeated by a lower density flow of heavy ions, are the most promising avenue for future research. 106 refs., 4 figs., 2 tabs.
Author: Vadim Urpin
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659593765
Category :
Languages : en
Pages : 56
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Book Description
Pulsars have been discovered in 1967 and identified with rotating neutron stars. Such stars form as a result of the collapse of ordinary stars which have exhausted their nuclear fuel. The magnetic field of neutron stars can reach a very high value of the order of 10 DEGREES13-10 DEGREES14 G. The magnetospheres formed around these stars should be very particular because of strong magnetic field and rapid rotation. A study of the pulsar magnetospheres is of great importance since it is the key issue to understand how the energy outflow to the exterior is produced. In this work, we consider magnetohydrodynamic processes in the pulsar magnetosphere. We study in detail the properties of magnetohydrodynamic waves that can exist in the magnetosphere and their instabilities. These instabilities can lead to formation of structures and be responsible for a short-term variability of the pu
Author: Robert Archibald
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
"Pulsars are the rotating compact remnants of exploded massive stars. The region surrounding the neutron star, known as the magnetosphere, has properties which are determined by the magnetic ield of the star. In this thesis, I present several observational results involving rotation-powered radio pulsars and magnetars which indicate that pulsar magnetospheres have a more complex structure than a simple dipole, and that the magnetosphere can have a strong efect on all the observed properties of neutron stars. One way to probe the pulsar magnetosphere is through the measurement of braking indices. A braking index quantifies the dependence of the torque on the spin frequency. In Chapter 4 I present a long-term timing study of the rotation-powered pulsar PSR J1846−0258, where we show that the change in braking index reported in this source is long-lived. The most plausible explanation for this changed braking index appears to be due to a change in magnetospheric configuration. In Chapter 5, I present the measurement of a new braking index for the rotation-powered pulsar PSR J1640−4631 of n= 3.15 ± 0.03 - the first measured braking index higher than the canonical three of a magnetic dipole. This result demonstratesthat other physical mechanisms, such as mass or magnetic quadrupole moments most likely need to be taken into account to describe pulsar spin-down & energetics.Another way to probe the magnetospheres of pulsars is by studying the extreme variability seen in the magnetar class. In Chapter 6 I present two years of flux and spin evolution monitoring of the magnetar 1E 1048.1−5937 following an outburst. By comparing to previous outbursts from the source, we show that this pattern of behaviour repeats itself with a quasi-period of ∼1800 days. This behaviour, when compared to similar less extreme events seen in rotation-powered pulsars, appears to implicate processes in the stellar magnetosphere. In Chapter 7, I present the results of monitoring the magnetar 4U 0142+61 over two outbursts, including one with a net spin-down timing event, and compare this timing event to previous such events in other pulsars with high magnetic fields anddiscuss net spin-down glitches now seen in several young, high-B pulsars. The observations that these spin-down events occur in only high-B sources strongly implicates the influence of a large magnetic field in spin-down events and, coupled with the radiatively loud nature of the plurality of spin-down events, suggests an origin in the magnetosphere of the star. In Chapter 8 I present observations of a magnetar-like outburst from the high-magnetic-field pulsar PSR J1119−6127, providing an unambiguous connection between the radio pulsar and magnetar populations.Finally, in Chapter 9, I put these new results in context with recent advances in neutron-star astrophysics, and speculate on avenues for future advancement in the field." --
Author: B. B. Kadomsev
Publisher: World Scientific
ISBN: 9814289728
Category : Science
Languages : en
Pages : 146
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Book Description
This book serves as a good introduction to The physics of pulsars by explaining the subject matter in simple terms which are understandable to both undergraduate physics students and also the general public. On the Pulsar links together ideas about physics, informatics and biology, and contains many original examples, problems and solutions. it starts with simple examples about the regular structures that are possible in strong magnetic fields and The author then suggests that special conditions on the pulsar can result in some forms of self-organization. it will also make a valuable teaching guide.
