Радиоизлучение RRAT-пульсаров на частоте 111 МГц

Астрономический журнал. 2014. Т. 91. № 8. С. 626–633.

Лосовский Б. Я., Dumsky D.

Observations of the RRAT pulsars J0627+16, J0628+09, J1819−1458, J1826−1419,
J1839−01, J1840−1419, J1846−0257, J1848−12, J1850+15, J1854+0306, J1919+06, J1913+1330,
J1919+17, J1946+24, and J2033+00 observed earlier on the 64-m Parkes telescope (Australia) and the
300-m Arecibo radio telescope (Puerto Rico) at 1400 MHz were conducted at 111 MHz on the LSA
radio telescope of the Pushchino Radio Astronomy observatory in 2010–2012. A characteristic feature
of these pulsars is their sporadic radio emission during rare active epochs and the absence of radio emission
during long time intervals. No appreciable flare activity of these pulsars was detected in the Pushchino
observations. However, processing the observations using the Fast Folding Algorithm taking into account
known information about the pulsar dispersion measures and periods shows that, even during quiescent
intervals, the majority of the studied pulsars generate weak radio pulses with a period corresponding to that
of the radio emission of the sporadic pulses observed at active epochs. The flux of this radio emission does
not exceed 100 mJy at the pulse peak, even at the low frequency of 111 MHz. This considerably hinders
detection of the radio emission of RRAT pulsars at high frequencies, since the radio fluxes of RRAT pulsars
decreases with increasing frequency.

Keywords: радиоастрономия, radio astronomy, pulsar, пульсары