A long-term study of three rotating radio transients

作者：Bhattacharyya B^*; Lyne A G; Stappers B W; Weltevrede P; Keane E F; McLaughlin M A; Kramer M; Jordan C; Bassa C

来源：Monthly Notices of the Royal Astronomical Society, 2018, 477(3): 4090-4103.

DOI：10.1093/mnras/sty923

• stars: neutron
• pulsars: general
• pulsars individual: J1819-1458, J1840-1419, J1913+1330

We present the longest term timing study so far of three rotating radio transients (RRATs) - J1819-1458, J1840-1419, and J1913+1330 - performed using the Lovell, Parkes, and Green Bank telescopes over the past decade. We study long-term and short-term variations of the pulse emission rate from these RRATs and report a marginal indication of a long-term increase in pulse detection rate over time for PSR J1819-1458 and J1913+1330. For PSR J1913+1330, we also observe a two orders of magnitude variation in the observed pulse detection rates across individual epochs, which may constrain the models explaining the origin of RRAT pulses. PSR J1913+1330 is also observed to exhibit a weak persistent emission mode. We investigate the post-glitch timing properties of J1819-1458 (the only RRAT for which glitches are observed) and discuss the implications for possible glitch models. Its post-glitch over-recovery of the frequency derivative is magnetar-like and similar behaviour is only observed for two other pulsars, both of which have relatively high magnetic field strengths. Following the over-recovery, we also observe that some fraction of the pre-glitch frequency derivative is gradually recovered.

• 出版日期2018-7