The Young Pulsar J1357-6429 and Its Pulsar Wind Nebula

Abstract

We observed the young pulsar J1357--6429 with the {\it Chandra} and {\it XMM-Newton} observatories. The pulsar spectrum fits well a combination of absorbed power-law model ($\Gamma =1.7\pm 0.6$) and blackbody model ($kT=140_{-40}^{+60}$ eV, $R\sim 2$ km at the distance of 2.5 kpc). Strong pulsations with pulsed fraction of $42$, apparently associated with the thermal component, were detected in 0.3--1.1 keV. Surprisingly, pulsed fraction at higher energies, 1.1--10 keV, appears to be smaller, $23$. The small emitting area of the thermal component either corresponds to a hotter fraction of the neutron star (NS) surface or indicates inapplicability of the simplistic blackbody description. The X-ray images also reveal a pulsar-wind nebula (PWN) with complex, asymmetric morphology comprised of a brighter, compact PWN surrounded by the fainter, much more extended PWN whose spectral slopes are $\Gamma =1.3\pm 0.3$ and $\Gamma =1.7\pm 0.2$, respectively. The extended PWN with the observed flux of $\sim 7.5\times 10^{-13}$ erg s${}^{-1}$ cm${}^{-2}$ is a factor of 10 more luminous then the compact PWN. The pulsar and its PWN are located close to the center of the extended TeV source HESS J1356--645, which strongly suggests that the VHE emission is powered by electrons injected by the pulsar long ago. The X-ray to TeV flux ratio, $\sim 0.1$, is similar to those of other relic PWNe. We found no other viable candidates to power the TeV source. A region of diffuse radio emission, offset from the pulsar toward the center of the TeV source, could be synchrotron emission from the same relic PWN rather than from the supernova remnant.

18 pages, 12 figures, and 4 tables, Accepted for publication in ApJ

References in corpus (13)

• Pulsar Wind Nebulae in the Chandra Era
• X-ray Observations of Parsec-Scale Tails behind Two Middle-Aged Pulsars
• Discovery of new gamma-ray pulsars with AGILE
• Chandra Observation of PSR B1823-13 and its Pulsar Wind Nebula
• X-ray emission from PSR J1809-1917 and its pulsar wind nebula, possibly associated with the TeV gamma-ray source HESS J1809-193
• Chandra Observations of the High-Magnetic-Field Radio Pulsar J1718-3718
• Discovery of the source HESS J1356-645 associated with the young and energetic PSR J1357-6429
• First X-ray observations of the young pulsar J1357-6429
• New X-ray observations of the Geminga pulsar wind nebula
• Discovery of gamma and X-ray pulsations from the young and energetic PSR J1357-6429 with Fermi and XMM-Newton
• Nucleonic gamma-ray production in Pulsar Wind Nebulae
• VLT observations of the two Fermi pulsars PSR J1357-6429 and PSR J1048-5832
• Discovery of X-ray emission from the young radio pulsar PSR J1357-6429

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• The power-law component of the X-ray emissions from pulsar wind nebulae and their pulsars
• Observations of PSR J1357-6429 at 2.1 GHz with the Australia Telescope Compact Array
• Suzaku Observations of the old pulsar wind nebula candidate HESS J1356-645
• A high-magnetic-field radio pulsar survey with Swift/XRT
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