PSR J1856+0245: Arecibo Discovery of a Young, Energetic Pulsar Coincident with the TeV γ-Ray Source HESS J1857+026 - Archive ouverte HAL Access content directly
Journal Articles The Astrophysical journal letters Year : 2008

PSR J1856+0245: Arecibo Discovery of a Young, Energetic Pulsar Coincident with the TeV γ-Ray Source HESS J1857+026

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J. W. T. Hessels
  • Function : Author
D. J. Nice
  • Function : Author
B. M. Gaensler
  • Function : Author
V. M. Kaspi
  • Function : Author
D. R. Lorimer
  • Function : Author
D. J. Champion
  • Function : Author
A. G. Lyne
  • Function : Author
M. Kramer
  • Function : Author
J. M. Cordes
  • Function : Author
P. C. C. Freire
  • Function : Author
F. Camilo
  • Function : Author
S. M. Ransom
  • Function : Author
J. S. Deneva
  • Function : Author
N. D. R. Bhat
  • Function : Author
F. Crawford
  • Function : Author
F. A. Jenet
  • Function : Author
L. Kasian
  • Function : Author
P. Lazarus
  • Function : Author
J. van Leeuwen
  • Function : Author
M. A. Mclaughlin
  • Function : Author
I. H. Stairs
  • Function : Author
B. W. Stappers
  • Function : Author
A. Venkataraman
  • Function : Author

Abstract

We present the discovery of the Vela-like radio pulsar J1856+0245 in the Arecibo PALFA survey. PSR J1856+0245 has a spin period of 81 ms, a characteristic age of 21 kyr, and a spin-down luminosity Ė = 4.6 × 1036 ergs s-1. It is positionally coincident with the TeV γ-ray source HESS J1857+026, which has no other known counterparts. Young, energetic pulsars create wind nebulae, and more than a dozen pulsar wind nebulae have been associated with very high energy (100 GeV-100 TeV) γ-ray sources discovered with the HESS telescope. The γ-ray emission seen from HESS J1857+026 is potentially produced by a pulsar wind nebula powered by PSR J1856+0245; faint X-ray emission detected by ASCA at the pulsar's position supports this hypothesis. The inferred γ-ray efficiency is epsilonγ = Lγ/Ė =3.1 % (1-10 TeV, for a distance of 9 kpc), comparable to that observed in similar associations.

Dates and versions

insu-03611281 , version 1 (17-03-2022)

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Cite

J. W. T. Hessels, D. J. Nice, B. M. Gaensler, V. M. Kaspi, D. R. Lorimer, et al.. PSR J1856+0245: Arecibo Discovery of a Young, Energetic Pulsar Coincident with the TeV γ-Ray Source HESS J1857+026. The Astrophysical journal letters, 2008, 682, pp.L41. ⟨10.1086/590908⟩. ⟨insu-03611281⟩
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