Discovery of a Highly Energetic X-ray Pulsar Powering HESS J1813-178 in the Young Supernova Remnant G12.82-0.02

Abstract

We report the discovery of 44.7 ms pulsations from the X-ray source CXOU J181335.1-174957 using data obtained with the XMM-Newton Observatory. PSR J1813-1749 lies near the center of the young radio supernova remnant G12.82-0.02, which overlaps the compact TeV source HESS J1813-178. This rotation-powered pulsar is the second most energetic in the Galaxy, with a spin-down luminosity of Edot = (6.8 +/- 2.7)E37 erg/s. In the rotating dipole model, the surface dipole magnetic field strength is B_s = (2.7 +/- 0.6)E12 G and the spin-down age of 3.3-7.5 kyr, consistent with the location in the small, shell-type radio remnant. At an assumed distance of 4.7 kpc by association with an adjacent young stellar cluster, the efficiency of PSR J1813-1749 in converting spin-down luminosity to radiation is approx. 0.03% for its 2-10 keV flux, approx. 0.1% for its 20-100 keV INTEGRAL flux, and approx. 0.07% for the >200 GeV emission of HESS J1813-178, making it a likely power source for the latter. The nearby young stellar cluster is possibly the birthplace of the pulsar progenitor, as well as an additional source of seed photons for inverse Compton scattering to TeV energies.

5 pages, 3 figure, Latex, emulateapj style. To appear in the Astrophysical Journal Letters

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Cited by in corpus (13)

• Searches for Continuous-Wave Gravitational Radiation
• The soft gamma-ray pulsar population: an high-energy overview
• Distances, Radial Distribution and Total Number of Galactic Supernova Remnants
• The Galactic population and properties of young, highly-energetic pulsars
• Timing six energetic rotation-powered X-ray pulsars, including the fast-spinning young PSR J0058-7218 and Big Glitcher PSR J0537-6910
• Radio Detection of PSR J1813-1749 in HESS J1813-178: The Most Scattered Pulsar Known
• Proper motion, spectra, and timing of PSR J1813-1749 using Chandra and NICER
• Galactic Observatory Science with the ASTRI Mini-Array at the Observatorio del Teide
• Study of maximum electron energy of sub-PeV pulsar wind nebulae by multiwavelength modelling
• Spectral Break of Energetic Pulsar Wind Nebulae Detected with Wideband X-ray Observations
• Radio Proper Motions of the Energetic Pulsar PSR~J1813$-$1749
• Unveiling extended gamma-ray emission around HESS J1813-178
• 4XMM J181330.1-175110: a new supergiant fast X-ray transient