Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980japa....1..119v&link_type=abstract
Journal of Astrophysics and Astronomy, vol. 1, Dec. 1980, p. 119-128.
Astronomy and Astrophysics
Astrophysics
9
Electric Sparks, Magnetic Fields, Polar Caps, Pulsars, Pulse Amplitude, Pulse Duration, Surface Properties, Earth Magnetosphere, Multipoles, Particle Production, Positrons, Surface Layers, Surface Roughness Effects
Scientific paper
Two possible explanations are offered to account for the characteristics of integrated pulse profiles, in particular, their degree of complexity, their variation from pulsar to pulsar, their stability, and the tendency of complex profiles to be associated with older pulsars. It is proposed that the pulse structure could be a reflection of surface irregularities at the polar caps, and it is shown how the surface relief can affect the number of positrons released into the magnetosphere which are subsequently responsible for the observed radio radiation. The electrons produced in the vacuum break-down in the gap carry enough energy to allow creating such a surface relief in one million years, and one way in which this could be achieved is discussed. Alternatively, the presence of multipole components in the magnetic fields of older pulsars could lead to significant variations in the curvature of the field lines across the gap, and hence to structure in the integrated pulse profiles. An assessment of the two hypotheses from observed pulse profiles seems to favor the polar cap relief picture.
Radhakrishnan Venkatesh
Vivekanand Maddali
No associations
LandOfFree
The structure of integrated pulse profiles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The structure of integrated pulse profiles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The structure of integrated pulse profiles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-755354