On the nature of Off-pulse emission from pulsars

Abstract

In Basu et al. 2011 we reported the detection of Off-pulse emission from two long period pulsars B0525+21 and B2045-16. The pulsars were observed at a single epoch using the 325 MHz frequency band of the Giant Meterwave Radio Telescope (GMRT). In this paper we report a detailed study of the Off-pulse emission from these two pulsars using multiple observations at two different frequencies, 325 MHz and 610 MHz bands of GMRT. We report detection of Off-pulse emission during each observation and based on the scintillation effects and spectral index of Off-pulse emission we conclude a magnetospheric origin. The magnetospheric origin of Off-pulse emission gives rise to various interesting possibilities about its emission mechanism and raises questions about the structure of the magnetosphere.

arXiv comment13 pages, 6 figures, accepted for publication in the ApJ

References in corpus (8)

• The Evolution and Structure of Pulsar Wind Nebulae
• Pulsar spectra of radio emission
• The spark-associated soliton model for pulsar radio emission
• Curvature radiation in pulsar magnetospheric plasma
• DA495 - an aging pulsar wind nebula
• Unraveling the nature of coherent pulsar radio emission
• On the aberration-retardation effects in pulsars
• Detection of off-pulse emission from PSR B0525+21 and PSR B2045-16

Cited by in corpus (10)

• An Asteroid Belt Interpretation for the Timing Variations of the Millisecond Pulsar B1937+21
• The Nature of Coherent Radio Emission from Pulsars
• Flux density measurements of GPS candidate pulsars at 610 MHz using interferometric imaging technique
• Coherently dedispersed gated imaging of millisecond pulsars
• Discovery of a Pulsar Wind Nebula around B0950+08 with the ELWA
• The Enigmatic compact radio source coincident with the energetic X-ray pulsar PSR J1813$-$1749 and HESS J1813$-$178
• Scintillation based search for off-pulse radio emission from pulsars
• Probing the origin of the off-pulse emission from the pulsars B0525+21 and B2045-16
• An emission mechanism explaining off-pulse emission originating in the outer magnetosphere of pulsars
• Search for Off-pulse emission in Long Period Pulsars