Detection of radio emission from the gamma-ray pulsar J1732−3131 at 327 MHz

Maan Y, Moochickal Ambalappat K, Naidu AK, Roy S, Joshi BC, Kerr M, Manoharan PK (2017)
Monthly Notices of the Royal Astronomical Society 471(1): 541-547.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Maan, Yogesh; Moochickal Ambalappat, KrishnakumarUniBi ; Naidu, Arun K.; Roy, Subhashis; Joshi, Bhal Chandra; Kerr, Matthew; Manoharan, P. K.
Abstract / Bemerkung
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 h, we present a detection of the pulsar at a confidence level of 99.82 per cent. 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 ± 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.
Erscheinungsjahr
2017
Zeitschriftentitel
Monthly Notices of the Royal Astronomical Society
Band
471
Ausgabe
1
Seite(n)
541-547
ISSN
0035-8711
eISSN
1365-2966
Page URI
https://pub.uni-bielefeld.de/record/2953654

Zitieren

Maan Y, Moochickal Ambalappat K, Naidu AK, et al. Detection of radio emission from the gamma-ray pulsar J1732−3131 at 327 MHz. Monthly Notices of the Royal Astronomical Society. 2017;471(1):541-547.
Maan, Y., Moochickal Ambalappat, K., Naidu, A. K., Roy, S., Joshi, B. C., Kerr, M., & Manoharan, P. K. (2017). Detection of radio emission from the gamma-ray pulsar J1732−3131 at 327 MHz. Monthly Notices of the Royal Astronomical Society, 471(1), 541-547. https://doi.org/10.1093/mnras/stx1615
Maan, Y., Moochickal Ambalappat, K., Naidu, A. K., Roy, S., Joshi, B. C., Kerr, M., and Manoharan, P. K. (2017). Detection of radio emission from the gamma-ray pulsar J1732−3131 at 327 MHz. Monthly Notices of the Royal Astronomical Society 471, 541-547.
Maan, Y., et al., 2017. Detection of radio emission from the gamma-ray pulsar J1732−3131 at 327 MHz. Monthly Notices of the Royal Astronomical Society, 471(1), p 541-547.
Y. Maan, et al., “Detection of radio emission from the gamma-ray pulsar J1732−3131 at 327 MHz”, Monthly Notices of the Royal Astronomical Society, vol. 471, 2017, pp. 541-547.
Maan, Y., Moochickal Ambalappat, K., Naidu, A.K., Roy, S., Joshi, B.C., Kerr, M., Manoharan, P.K.: Detection of radio emission from the gamma-ray pulsar J1732−3131 at 327 MHz. Monthly Notices of the Royal Astronomical Society. 471, 541-547 (2017).
Maan, Yogesh, Moochickal Ambalappat, Krishnakumar, Naidu, Arun K., Roy, Subhashis, Joshi, Bhal Chandra, Kerr, Matthew, and Manoharan, P. K. “Detection of radio emission from the gamma-ray pulsar J1732−3131 at 327 MHz”. Monthly Notices of the Royal Astronomical Society 471.1 (2017): 541-547.

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