Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...373l..17h&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 373, May 20, 1991, p. L17-L21. NIST-supported research.
Astronomy and Astrophysics
Astrophysics
15
Interstellar Matter, Line Shape, Line Spectra, Pulsars, Magnetic Field Configurations, Pulsar Magnetospheres
Scientific paper
Time-aligned profile measurements for two pulsars, combining data from the Arecibo, Puerto Rico, and Pushchino, U.S.S.R., observatories over a seven-octave frequency interval between 25 and 5000 MHZ are analyzed along with several new microstructure dispersion values. DMA(A) values of 2.9701 + or - 0.0003, and 4.8470 + or - 0.0003 pc/cu cm for PSR 0950+08 and 1113+16, respectively are obtained, with small departures from alignment that appear traceable to changes in a profile shape with frequency. These subtle changes in the profile form are noticeable only by virtue of the high time resolution and broad frequency coverage. It is noted that small low-frequency delays result when the sets of profiles are aligned optimally according to the best available microstructure dispersion values.
Hankins Timothy H.
Izvekova Vera A.
Malofeev Valerii M.
Rankin Joanna M.
Shitov Yuri P.
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