FAST discovery of an extremely radio-faint millisecond pulsar from the Fermi-LAT unassociated source 3FGL J0318.1+0252 - Archive ouverte HAL
Article Dans Une Revue Sci.China Phys.Mech.Astron. Année : 2021

FAST discovery of an extremely radio-faint millisecond pulsar from the Fermi-LAT unassociated source 3FGL J0318.1+0252

Pei Wang
  • Fonction : Auteur
Di Li
  • Fonction : Auteur
Colin J. Clark
  • Fonction : Auteur
Pablo Saz Parkinson
  • Fonction : Auteur
Xian Hou
  • Fonction : Auteur
Weiwei Zhu
  • Fonction : Auteur
Lei Qian
  • Fonction : Auteur
Youling Yue
  • Fonction : Auteur
Zhichen Pan
  • Fonction : Auteur
Zhijie Liu
  • Fonction : Auteur
Xuhong Yu
  • Fonction : Auteur
Xiaoyao Xie
  • Fonction : Auteur
Qijun Zhi
  • Fonction : Auteur
Hui Zhang
  • Fonction : Auteur
Jumei Yao
  • Fonction : Auteur
Jun Yan
  • Fonction : Auteur
Chengmin Zhang
  • Fonction : Auteur
Paul S. Ray
  • Fonction : Auteur
Matthew Kerr
  • Fonction : Auteur
Peter F. Michelson
  • Fonction : Auteur
Elizabeth C. Ferrara
  • Fonction : Auteur
David J. Thompson
  • Fonction : Auteur
Zhiqiang Shen
Na Wang

Résumé

High sensitivity radio searches of unassociated γ-ray sources have proven to be an effective way of finding new pulsars. Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST) during its commissioning phase, we have carried out a number of targeted deep searches of Fermi Large Area Telescope (LAT) γ-ray sources. On February 27, 2018 we discovered an isolated millisecond pulsar (MSP), PSR J0318+0253, coincident with the unassociated γ-ray source 3FGL J0318.1+0252. PSR J0318+0253 has a spin period of 5.19 ms, a dispersion measure (DM) of 26 pc cm$^{−3}$ corresponding to a DM distance of about 1.3 kpc, and a period-averaged flux density of (∼11±2) µJy at L-band (1.05–1.45 GHz). Among all high energy MSPs, PSR J0318+0253 is the faintest ever detected in radio bands, by a factor of at least ∼4 in terms of L-band fluxes. With the aid of the radio ephemeris, an analysis of 9.6 years of Fermi-LAT data revealed that PSR J0318+0253 also displays strong γ-ray pulsations. Follow-up observations carried out by both Arecibo and FAST suggest a likely spectral turn-over around 350 MHz. This is the first result from the collaboration between FAST and the Fermi-LAT teams as well as the first confirmed new MSP discovery by FAST, raising hopes for the detection of many more MSPs. Such discoveries will make a significant contribution to our understanding of the neutron star zoo while potentially contributing to the future detection of gravitational waves, via pulsar timing array (PTA) experiments.

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Dates et versions

hal-03351835 , version 1 (22-09-2021)

Identifiants

Citer

Pei Wang, Di Li, Colin J. Clark, Pablo Saz Parkinson, Xian Hou, et al.. FAST discovery of an extremely radio-faint millisecond pulsar from the Fermi-LAT unassociated source 3FGL J0318.1+0252. Sci.China Phys.Mech.Astron., 2021, 64 (12), pp.129562. ⟨10.1007/s11433-021-1757-5⟩. ⟨hal-03351835⟩
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