Periodic mode changing in PSR J1048-5832

Abstract

By analysing the data acquired from the Parkes 64-m radio telescope at 1369 MHz, we report on the phase-stationary non-drift amplitude modulation observed in PSR J1048-5832. The high-sensitivity observations revealed that the central and trailing components of the pulse profile of this pulsar switch between a strong mode and a weak mode periodically. However, the leading component remains unchanged. Polarization properties of the strong and weak modes are investigated. Considering the similarity to mode changing, we argue that the periodic amplitude modulation in PSR J1048$-$5832 is periodic mode changing. The fluctuation spectral analysis showed that the modulation period is very short (~2.1 s or 17 P1), where P1 is the rotation period of the pulsar. We find that this periodic amplitude modulation is hard to explain by existing models that account for the periodic phenomena in pulsars like subpulse drifting.

8 pages, 8 figures, 3 tables, accepted in MNRAS for publication

References in corpus (15)

• The ATNF Pulsar Catalogue
• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• A periodically active pulsar giving insight into magnetospheric physics
• Pulsar Nulling and Mode Changing
• Polarimetry of 600 pulsars from observations at 1.4 GHz with the Parkes radio telescope
• Meterwavelength Single-pulse Polarimetric Emission Survey II: The phenomenon of Drifting Subpulses
• Radio and X-ray observations of the intermittent pulsar J1832+0029
• Deep Analyses of Nulling in Arecibo Pulsars Reveal Further Periodic Behavior
• Meterwavelength Single-pulse Polarimetric Emission Survey III: The Phenomenon of Nulling in Pulsars
• Constraints on viewing geometries from radio observations of $\gamma$-ray-loud pulsars using a novel method
• Two long-term intermittent pulsars discovered in the PALFA Survey
• Simultaneous X-ray and radio observations of the radio-mode switching pulsar PSR B1822-09
• Subpulse Drifting, Nulling and Mode changing in PSR J2006$-$0807 with Core emission
• Periodic Q-mode modulation in PSR J1825$-$0935 (PSR B1822$-$09)
• Radio emission features in different modes of PSR J0826+2637 (B0823+26)

Cited by in corpus (8)

• Explaining high-braking indice of magnetars SGR 0501+4516 and 1E 2259+586 using the double magnetic-dipole model
• A polarization census of bright pulsars using the Ultra-Wideband Receiver on the Parkes radio telescope
• The dissipation of toroidal magnetic fields and spin-down evolution of young and strongly magnetized pulsars
• Nulling and subpulse drifting in PSR J1727-2739
• Periodic and Phase-locked Modulation in PSR B1929+10 Observed with FAST
• Emission Variation of a Long-period Pulsar Discovered by the Five-hundred-meter Aperture Spherical Radio Telescope (FAST)
• Detection of giant pulses in PSR J1047-6709
• Complex emission patterns: fluctuations and bistability of polar-cap potentials