2003/05/15 by Roderick Edwards, R. T. Edwards, B. W. Stappers · 4 citations
Earth and Planetary Sciences · Physics and Astronomy · #Acoustics #Astrophysics #Atomic and Subatomic Physics Research #Biology #Detector #Flux (metallurgy) #High-pressure geophysics and materials #Intensity (physics) #Materials science #Modulation (music) #Optics #Phase (matter) #Physics #Pulsar #Pulsars and Gravitational Waves Research #Pulse (music) #Pulse rate #Pulse-width modulation #Quantum mechanics #Voltage #astro-ph
paper · pdf · doi:10.1051/0004-6361:20030716
published as Astron.Astrophys. 407 (2003) 273-288 · 15 pages, 17 figures, accepted to A&A
arxiv created 2003/05/15 · openalex publication_date 2003/07/28 · arxiv updated 2009/12/01 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/05
We report the detection of pulse-to-pulse periodic intensity modulations, in observations of recycled pulsars. Even though the detection of individual pulses was generally not possible due to their low flux density and short duration, through the accumulation of statistics over sequences of 105–106 pulses we were able to determine the presence and properties of the pulse-to-pulse intensity variations of six pulsars. In most cases we found that the modulation included a weak, broadly quasi-periodic component. For two pulsars the sensitivity was high enough to ascertain that the modulation phase apparently varies systematically across the profile, indicating that the modulation appears as drifting subpulses. We detected brighter than average individual pulses in several pulsars, with energies up to 2–7 times higher than the mean, similar to results from normal pulsars. We were sensitive to giant pulses of a rate of occurrence equal to (and in many instances much lower than) that of PSR B1937+21 at 1400 MHz (~30 times lower than at 430 MHz), but none were detected, indicating that the phenomenon is rare in recycled pulsars.