Multi-frequency scatter-broadening evolution of pulsars

Moochickal Ambalappat K, Joshi BC, Manoharan PK (2017)
Proceedings of the International Astronomical Union 13(S337): 364-365.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Moochickal Ambalappat, KrishnakumarUniBi ; Joshi, Bhal Chandra; Manoharan, P. K.
Abstract / Bemerkung
Abstract In this paper, we present our study on multi-frequency scatter-broadening observations of a large sample of pulsars, made using the Ooty Radio Telescope (ORT) and the Giant Metrewave Radio Telescope (GMRT). For each pulsar, the scatter-broadening time scales (τsc) have been estimated at different observing frequencies and the dependence of τsc with the observing frequency, i.e., the frequency scaling index (α) has been obtained. We report estimates of α for a set of 39 pulsars, of which 31 are completely new and provide the first-time measurement on about 50% of the sample. This enhanced sample suggests that almost 65% of the pulsars have an α much lower than the conventional value of 4.4 for a Kolmogorov type turbulence spectrum, and a considerably large scattering strength. An increase in scattering strength is observed with the distance to the pulsar in the Galaxy.
Erscheinungsjahr
2017
Zeitschriftentitel
Proceedings of the International Astronomical Union
Band
13
Ausgabe
S337
Seite(n)
364-365
ISSN
1743-9213
eISSN
1743-9221
Page URI
https://pub.uni-bielefeld.de/record/2953649

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Moochickal Ambalappat K, Joshi BC, Manoharan PK. Multi-frequency scatter-broadening evolution of pulsars. Proceedings of the International Astronomical Union. 2017;13(S337):364-365.
Moochickal Ambalappat, K., Joshi, B. C., & Manoharan, P. K. (2017). Multi-frequency scatter-broadening evolution of pulsars. Proceedings of the International Astronomical Union, 13(S337), 364-365. https://doi.org/10.1017/S1743921317010298
Moochickal Ambalappat, K., Joshi, B. C., and Manoharan, P. K. (2017). Multi-frequency scatter-broadening evolution of pulsars. Proceedings of the International Astronomical Union 13, 364-365.
Moochickal Ambalappat, K., Joshi, B.C., & Manoharan, P.K., 2017. Multi-frequency scatter-broadening evolution of pulsars. Proceedings of the International Astronomical Union, 13(S337), p 364-365.
K. Moochickal Ambalappat, B.C. Joshi, and P.K. Manoharan, “Multi-frequency scatter-broadening evolution of pulsars”, Proceedings of the International Astronomical Union, vol. 13, 2017, pp. 364-365.
Moochickal Ambalappat, K., Joshi, B.C., Manoharan, P.K.: Multi-frequency scatter-broadening evolution of pulsars. Proceedings of the International Astronomical Union. 13, 364-365 (2017).
Moochickal Ambalappat, Krishnakumar, Joshi, Bhal Chandra, and Manoharan, P. K. “Multi-frequency scatter-broadening evolution of pulsars”. Proceedings of the International Astronomical Union 13.S337 (2017): 364-365.

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