Frequency structure of micropulses from pulsar PSR 0950+08.
Abstract
Radio-frequency spectra of short-time-scale structure (micropulses) were analyzed over a 1.25 MHz bandwidth. An autocorrelation analysis of the spectra revealed no significant frequency structure other than that expected from micropulses that are envelopes of a white Gaussian random process. This implies that there were no spectral lines or other deviations from flat spectra, that unresolved micropulses contribute negligibly to the spectra, and that a single micropulse is due to the incoherent addition of radiation from many coherently radiation emitters. The radiation bandwidth of each emitter must be at least 5 kHz and may be as large as several hundred MHz. Micropulses are probably determined by processes that are distinct from those responsible for the coherence of the radiation.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1979
- DOI:
- 10.1086/157461
- Bibcode:
- 1979ApJ...233..981C
- Keywords:
-
- Micropulsations;
- Pulsars;
- Radio Spectra;
- Spectrum Analysis;
- Stellar Radiation;
- Amplitude Modulation;
- Autocorrelation;
- Coherent Electromagnetic Radiation;
- Radiant Flux Density;
- Astrophysics;
- Pulsars:Pulse Structure;
- Pulsars:Radio Spectra