Observations of Bright Pulses from Pulsar B0031-07 at 4.82 GHz

Wen, Z. G.; Yuen, R.; Wang, N.; Tu, Z. Y.; Yan, Z.; Yuan, J. P.; Yan, W. M.; Chen, J. L.; Wang, H. G.; Shen, Z. Q.; Wang, Z.; Yang, W. J.; Duan, X. F.; Zhang, Y. F.; Wang, Y. B.; Mao, J. W.

doi:10.3847/1538-4357/ac0e90

Observations of Bright Pulses from Pulsar B0031-07 at 4.82 GHz

Wen, Z. G.^*; Yuen, R.; Wang, N.; Tu, Z. Y.; Yan, Z.; Yuan, J. P.; Yan, W. M.; Chen, J. L.; Wang, H. G.; Shen, Z. Q.; Wang, Z.; Yang, W. J.; Duan, X. F.; Zhang, Y. F.; Wang, Y. B.; Mao, J. W.

Astrophysical Journal, 2021, 918(2): 57.

DOI: 10.3847/1538-4357/ac0e90

Basic Info

Comment

Summary

We report on the detection of 146 (0.96%) bright pulses with a peak flux density >0.86 Jy from PSR B0031-07 in 4 hr of continuous observations made at 4.82 GHz, with a bandwidth of 1 GHz, using the Shanghai Tian Ma 65 m radio telescope. We find that the peak flux density distribution follows a power law with index alpha = -3.6 +/- 0.2, while the pulse energy appears to follow a logarithmic normal distribution. The bright pulses from PSR B0031-07 were observed to repeat in an irregular fashion. The intervals between bright pulses can be described with an exponentiated Weibull distribution. Furthermore, the sensitive observations at higher frequency with a short time resolution of 65.54 mu s form a reliable basis for detailed microstructure studies. Close inspection of the detected bright pulses reveals that 38 pulses exhibit well-defined quasi-periodicities. No unanimous period for the quasi-periodicities is found, and the peak flux density is independent of the micropulse width. Finally, possible physical mechanisms are discussed.

Keywords

GIANT PULSES; RADIO-EMISSION; CRAB PULSAR; MICROSTRUCTURE

Institution

Shanghai Astronomical Observatory, Chinese Academy of Sciences

Full-text Preview

Access

Request