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arXiv · 1111.2953

Detection of off-pulse emission from PSR B0525+21 and PSR B2045-16

Rahul Basu·Ramana Athreya·Dipanjan Mitra
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Abstract

We report the detection of off-pulse emission from two long period pulsars PSR B0525+21 and PSR B2045-16 using the Giant Metrewave Radio Telescope (GMRT). We recorded high time resolution interferometric data at 325 MHz and gated the data offline to separate the on- and off-pulse sections of the pulsar. On imaging the two temporal sections separately, we detected a point source in the off-pulse images of both the pulsars coincident with the pulsar locations in the on-pulse images. The long periods (3.75 and 1.96 s respectively) and low spin-down energies (E ~ 10exp(31) erg s-1) of the two pulsars argue against a pulsar wind nebula (PWN) origin for the off-pulse emission. The derived estimates of the ISM particle density required to drive a PWN do not support such an interpretation. A magnetospheric origin for the off-pulse emission raises questions regarding the location of the emission region, which is an important input into pulsar emission models.

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Rahul Basu, Ramana Athreya, Dipanjan Mitra. 2011-11-12. Detection of off-pulse emission from PSR B0525+21 and PSR B2045-16. https://doi.org/10.1088/0004-637x%2F728%2F2%2F157

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