Abstract
Abstract We describe PSR J1926−0652, a pulsar recently discovered with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). Using sensitive single-pulse detections from FAST and long-term timing observations from the Parkes 64 m radio telescope, we probed phenomena on both long and short timescales. The FAST observations covered a wide frequency range from 270 to 800 MHz, enabling individual pulses to be studied in detail. The pulsar exhibits at least four profile components, short-term nulling lasting from 4 to 450 pulses, complex subpulse drifting behaviors and intermittency on scales of tens of minutes. While the average band spacing P 3 is relatively constant across different bursts and components, significant variations in the separation of adjacent bands are seen, especially near the beginning and end of a burst. Band shapes and slopes are quite variable, especially for the trailing components and for the shorter bursts. We show that for each burst the last detectable pulse prior to emission ceasing has different properties compared to other pulses. These complexities pose challenges for the classic carousel-type models.
Highlights
The Five-hundred-meter Aperture Spherical radio Telescope (FAST), located in southern China, is the world’s largest single-dish radio telescope
We report the discovery of PSR J1926−0652, which has a ∼ 1.6 s pulse period
The pulsar that we describe in this paper, PSR J1926−0652, has multiple pulse profile components and exhibits both subpulse drifting and nulling on various time-scales
Summary
The Five-hundred-meter Aperture Spherical radio Telescope (FAST), located in southern China, is the world’s largest single-dish radio telescope. We have continued observations with both FAST and Parkes and, as described in this paper, show that PSR J1926−0652 exhibits a wide-range of emission phenomena. Long-term monitoring of a pulsar provides information on the spin-down of the pulsar and long time-scale intermittent behavior Such monitoring provides high signal-to-noise, polarisation-calibrated, average pulse profiles that can be used to determine the emission geometry of the system. The single pulse observations provide information on the nulling and drifting phenomena Together, these results (for instance, as in Rankin et al 2008) can be used to search for the elusive physical model that will link these emission phenomena. The pulsar that we describe in this paper, PSR J1926−0652, has multiple pulse profile components and exhibits both subpulse drifting and nulling on various time-scales.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
