Radiation from Accelerated Charges by Professor G Srinivasan

Explore an in-depth lecture on radiation from accelerated charges, part of a summer course on astrophysics. Delve into topics such as plane waves, dipole approximation, energy flux, and radiation intensity. Examine the behavior of relativistic particles, synchrotron radiation, and gravitational waves. Learn about key theorems and concepts in astrophysical radiation, including quadrupole and magnetic dipole radiation, Landau levels, and synchrotron self-absorption. Gain insights into the diverse physical phenomena encountered in celestial objects, from solar wind to active galactic nuclei. Conclude with a preview of the next lecture on pulsars, supernova remnants, and radio galaxies, followed by a Q&A session.

Summer course 2018 - A Random walk in astro-physics
Radiation from Accelerated Charges Lecture-04
Plane wave
At distances large compared to the size of the system, as well as the wavelength, the field over small distance can be regarded as a plane wave. for a plane wave,
Dipole approximation
Energy Flux and Intensity of Radiation
Intensity and angular distribution
Spectral Resolution
Dipole rotating in xy-plane
Radiation from a nonrelativistic charge
Theorem: A closed system of particles, with the same ratio of charge-to-mass, cannot radiate by dipole radiation.
Quadrupole and Magnetic Dipole Radiation
Gravitational radiation
Radiation from relativistic particles
Angular Distribution - Relativistic case
Pulsed radiation from relativistic particles
Synchrotron Radiation
Synchrotron Radiation - Spectrum
Radiation from an ensemble of particles
Synchrotron Lifetime
Synchrotron self-absorption
Landau levels in a magnetic field
Next Lecture: Pulsars, Supernova Remnants and Radio Galaxies
Q&A