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Interstellar Fringes from PSR B0834+06

Published online by Cambridge University Press:  12 April 2016

Barney Rickett ,
Andrew Lyne  and
Yashwant Gupta
Barney Rickett
Affiliation:
University of California, San Diego, CA 92093-0407, USA
Andrew Lyne
Affiliation:
University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, SK11 9DL
Yashwant Gupta
Affiliation:
National Centre for Radio Astrophysics, TIFR, Post Bag 3, Ganeshkhind, Pune 411 007, India

Extract

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The spectra of radio flux from pulsars show deep modulations, over a typical time scale Δtd and frequency scale Δfd. These random diffractive interstellar scintillations are caused by inhomogeneities in the interstellar plasma on scales of 105m to 106m; on occasion there are also refractive modulations caused by very much larger scales. We report here an episode of periodic modulations of the dynamic spectrum of PSR B0834+06 seen in the sequence of observations centered at 408 MHz reported by Gupta et al. (1994 - GRL). There were 12 observations of about 2 hours covering 5 MHz spaced over 14 months. An episode of very fine periodic fringes was detected, though the period 45 kHz in frequency was barely resolved by the 19.5 kHz channel bandwiths; the period in time was about 5 minutes and was fully resolved. The normal Δfd was about 4 MHz (GRL) - ≈90 times the fringe period.

Type
Part 6 Winds and the ISM
Information
International Astronomical Union Colloquium , Volume 160: Pulsars: Problems and Progress , 1996 , pp. 471 - 472
Copyright
Copyright © Astronomical Society of the Pacific 1996

References

Cordes, J.M., Wolszczan, A., 1986, ApJ, 307, L27.[CW]CrossRefGoogle Scholar
Ewing, M., Batchelor, R., Friefeld, R., Price, R., Staelin, D., 1970, ApJ, 162, L169 Google Scholar
Fiedler, R.L., Dennison, B., Johnston, K. Hewish, A., 1987, Nature, 326, 675 Google Scholar
Goodman, J.J., Romani, R., Blandford, R., Narayan, R., 1987, MNRAS, 229, 73 Google Scholar
Gupta, Y., Rickett, B.J., Lyne, A.G., 1994, MNRAS, 269, 1035 CrossRefGoogle Scholar
Hewish, A., Wolszczan, A., Graham, D.A., 1985, MNRAS, 213, 167 CrossRefGoogle Scholar
Kulkarni, S.R., Heiles, C., 1986, “Galactic and Extragalactic Radio Astronomy”, eds Kellerman, K.I., Verschuur, G.L., Springer New York, pp95–152 Google Scholar
Reynolds, R.J., 1988, ApJ, 333, 341 Google Scholar
Rickett, B.J., Lyne, A.G., Gupta, Y., 1996, submitted to MNRASGoogle Scholar
Romani, R.W., Blandford, R.D., Cordes, J.M., 1987, Nature, 328, 324[RBC]CrossRefGoogle Scholar
Wilkinson, P.N., Narayan, R., Spencer, R.E., 1994, MNRAS, 269, 67 Google Scholar