Simultaneous two-station single pulse observations of radio pulsars over a broad frequency range. I - With particular reference to PSR 0809+74

Details Simultaneous two-station single pulse observations of radio pulsars over a broad frequency range. I - With particular reference to PSR 0809+74 Simultaneous two-station single pulse observations of radio pulsars over a broad frequency range. I - With particular reference to PSR 0809+74

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....93...85b&link_type=abstract

Astronomy and Astrophysics, vol. 93, no. 1-2, Jan. 1981, p. 85-92.

Astronomy and Astrophysics

Astrophysics

47

Frequency Response, Pulsars, Radio Emission, Radio Stars, Stellar Radiation, Cross Correlation, Emission Spectra, Frequency Ranges, Null Zones, Power Spectra, Stellar Magnetic Fields

Scientific paper

Single pulses of four radio pulsars were observed simultaneously at frequencies of f 102.5 MHz with the BSA transit array and at f 1720 MHz with the 100-m telescope. The mean intensities of three pulsars indicate a partial correlation over a 1:17 frequency range confirming a broad band emission mechanism for the single pulse intensities. An investigation of PSR 0809 + 74 shows a quasi-departure from the 1/(f square) cold plasma dispersion relation resulting from a distortion of the magnetic field lines and/or absorption of the portion of radiation in a corotating frame. It is concluded that these observations support models in which radiation at various frequencies is emitted at different locations along opening field lines so that radiation absorption and/or field line distortion have a dominant influence.

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