2021/08/20 by M. Cruces, Marilyn Cruces, D. J. Champion +45 · 34 citations
Physics and Astronomy · #Astronomy #Astrophysics #Binary pulsar #Gamma-ray bursts and supernovae #Green Bank Telescope #Millisecond pulsar #Neutron star #Physics #Population #Pulsar #Pulsar planet #Pulsars and Gravitational Waves Research #Radio Astronomy Observations and Technology #Radio telescope #Sky #Stars #Telescope #Vela #White dwarf #astro-ph.HE #astro-ph.SR
paper · pdf · doi:10.1093/mnras/stab2540
published in Monthly Notices of the Royal Astronomical Society 508(1), 300-314 (Oxford University Press)
arxiv created 2021/08/20 · openalex publication_date 2021/09/08 · arxiv updated 2021/09/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
ABSTRACT We report the follow-up of 10 pulsars discovered by the Five-hundred-metre Aperture Spherical radio-Telescope (FAST) during its commissioning. The pulsars were discovered at a frequency of 500-MHz using the ultrawide-band (UWB) receiver in drift-scan mode, as part of the Commensal Radio Astronomy FAST Survey (CRAFTS). We carried out the timing campaign with the 100-m Effelsberg radio-telescope at L-band around 1.36 GHz. Along with 11 FAST pulsars previously reported, FAST seems to be uncovering a population of older pulsars, bordering and/or even across the pulsar death-lines. We report here two sources with notable characteristics. PSR J1951+4724 is a young and energetic pulsar with nearly 100 per cent of linearly polarized flux density and visible up to an observing frequency of 8 GHz. PSR J2338+4818, a mildly recycled pulsar in a 95.2-d orbit with a Carbon–Oxygen white dwarf (WD) companion of \gtrsim 1 \rm M\odot , based on estimates from the mass function. This system is the widest WD binary with the most massive companion known to-date. Conspicuous discrepancy was found between estimations based on NE2001 and YMW16 electron density models, which can be attributed to underrepresentation of pulsars in the sky region between Galactic longitudes 70° < l < 100°. This work represents one of the early CRAFTS results, which start to show potential to substantially enrich the pulsar sample and refine the Galactic electron density model.