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24 April 2024 |
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Detection of radio emission from the gamma-ray pulsar J1732-3131 at 327 MHz | | Yogesh Maan
; M. A. Krishnakumar
; Arun K. Naidu
; Subhashis Roy
; Bhal Chandra Joshi
; Matthew Kerr
; P. K. Manoharan
; | | Date: |
26 Jun 2017 | | Abstract: | Although originally discovered as a radio-quiet gamma-ray pulsar, J1732-3131
has exhibited intriguing detections at decameter wavelengths. We report an
extensive follow-up of the pulsar at 327 MHz with the Ooty radio telescope.
Using the previously observed radio characteristics, and with an effective
integration time of 60 hrs, we present a detection of the pulsar at a
confidence level of 99.82%. The 327 MHz mean flux density is estimated to be
0.5-0.8 mJy, which establishes the pulsar to be a steep spectrum source and one
of the least-luminous pulsars known to date. We also phase-aligned the radio
and gamma-ray profiles of the pulsar, and measured the phase-offset between the
main peaks in the two profiles to be 0.24$pm$0.06. We discuss the observed
phase-offset in the context of various trends exhibited by the radio-loud
gamma-ray pulsar population, and suggest that the gamma-ray emission from
J1732-3131 is best explained by outer magnetosphere models. Details of our
analysis leading to the pulsar detection, and measurements of various
parameters and their implications relevant to the pulsar’s emission mechanism
are presented. | | Source: | arXiv, 1706.8613 | | Services: | Forum | Review | PDF | Favorites | |
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