Journal Article

Single-pulse analysis of PSR B1133+16 at 8.35 GHz and carousel circulation time

Sneha Honnappa, Wojciech Lewandowski, Jaroslaw Kijak, Avinash A. Deshpande, Janusz Gil, Olaf Maron and Axel Jessner

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 421, issue 3, pages 1996-2001
Published in print April 2012 | ISSN: 0035-8711
Published online April 2012 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2012.20424.x
Single-pulse analysis of PSR B1133+16 at 8.35 GHz and carousel circulation time

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A successful attempt has been made to analyse about 6000 single pulses of PSR B1133+16 obtained with the 100-m Effelsberg radio telescope. The high-resolution (60 μs) data were taken at a frequency of 8.35 GHz with a bandwidth of 1.1 GHz. In order to examine the pulse-to-pulse intensity modulations, we performed both longitude- and harmonic-resolved fluctuation spectral analysis. We identified the low-frequency feature associated with an amplitude modulation at , which can be interpreted as the circulation time P4≃ 30 P1 of the underlying subbeam carousel model. Despite the erratic nature of this pulsar, we also found evidence of periodic pseudo-nulls with P4= 28.44 P1. This is exactly the value at which Herfindal & Rankin found periodic pseudo-nulls in their 327 MHz data. We thus believe that this is the actual carousel circulation time in PSR B1133+16, particularly during orderly circulation.

Keywords: pulsars: general; pulsars: individual: B1133+16

Journal Article.  4752 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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