FAST early pulsar discoveries: Effelsberg follow-up

Abstract

We report the follow-up of 10 pulsars discovered by the Five-hundred-meter Aperture Spherical radio-Telescope (FAST) during its commissioning. The pulsars were discovered at a frequency of 500-MHz using the ultra-wide-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% 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 $\gtrsim 1{\mathrm{M}}_{\odot }$, 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 under-representation of pulsars in the sky region between Galactic longitudes $70^o<l<100^o$. 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.

References in corpus (15)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• The ATNF Pulsar Catalogue
• TEMPO2, a new pulsar timing package. I: Overview
• Tests of general relativity from timing the double pulsar
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• The Five-Hundred-Meter Aperture Spherical Radio Telescope (FAST) Project
• Formation of Double Neutron Star Systems
• Formation of millisecond pulsars with CO white dwarf companions - II. Accretion, spin-up, true ages and comparison to MSPs with He white dwarf companions
• Repeating behaviour of FRB 121102: periodicity, waiting times and energy distribution
• The Five-hundred-meter Aperture Spherical Radio Telescope (FAST) Project
• The LOFAR Tied-Array All-Sky Survey (LOTAAS): Survey overview and initial pulsar discoveries
• FAST: Its Scientific Achievements and Prospects
• The GBT350 Survey of the Northern Galactic Plane for Radio Pulsars and Transients
• An in-depth investigation of 11 pulsars discovered by FAST
• A Statistical Analysis of the Nulling Pulsar Population

Cited by in corpus (15)

• The Qitai Radio Telescope
• The FAST Galactic Plane Pulsar Snapshot survey: VI. The discovery of 473 new pulsars
• Four pulsar discoveries in NGC 6624 by TRAPUM using MeerKAT
• Arecibo and FAST Timing Follow-up of twelve Millisecond Pulsars Discovered in Commensal Radio Astronomy FAST Survey
• A discovery of Two Slow Pulsars with FAST: "Ronin" from the Globular Cluster M15
• The discovery of a rotating radio transient J1918$-$0449 with intriguing emission properties with the five hundred meter aperture spherical radio telescope
• The High Time Resolution Universe Pulsar Survey -- XVIII. The reprocessing of the HTRU-S Low Lat survey around the Galactic centre using a Fast Folding Algorithm pipeline for accelerated pulsars
• The Green Bank North Celestial Cap Survey IX: Timing Follow-up for 128 Pulsars
• FRB 20121102A monitoring: Updated periodicity in the L band
• Reciprocating Magnetic Fields in the Pulsar Wind Observed from the Black Widow Pulsar J1720-0534
• A GPU based single-pulse search pipeline (GSP) with database and its application to the commensal radio astronomy FAST survey (CRAFTS)
• New semicoherent targeted search for continuous gravitational waves from pulsars in binary systems
• PSR J1227$-$6208 and its massive white dwarf companion: pulsar emission analysis, timing update and mass measurements
• Discovery and Timing Follow-Up of Two FAST-Discovered Pulsars from the FAST CRAFTS Survey
• Pulsars identified in the LOFAR Two-metre Sky Survey at 144 MHz