2008/10/29 by A. De Rosa, P. Ubertini, R. Campana +3 · 25 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics and Cosmic Phenomena #Cosmic microwave background #Crab Nebula #Flux (metallurgy) #Lorentz factor #Millisecond pulsar #Nebula #Pulsar #Pulsar wind nebula #Pulsars and Gravitational Waves Research #Spectral index #astro-ph
paper · pdf · doi:10.1111/j.1365-2966.2008.14160.x
published in Monthly Notices of the Royal Astronomical Society 393(2), 527-530 (Oxford University Press) · 5 pages, 2 figures. Accepted for pubblication in MNRAS
arxiv created 2008/10/29 · openalex publication_date 2009/01/19 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
PSR J1833−1034 and its associated pulsar wind nebula (PWN) have been investigated in depth through X-ray observations ranging from 0.1 to 200 keV. The low-energy X-ray data from Chandra reveal a complex morphology that is characterized by a bright central plerion, no thermal shell and an extended diffuse halo. The spectral emission from the central plerion softens with radial distance from the pulsar, with the spectral index ranging from Γ= 1.61 in the central region to Γ= 2.36 at the edge of the PWN. At higher energy, INTEGRAL detected the source in the 17–200 keV range. The data analysis clearly shows that the main contribution to the spectral emission in the hard X-ray energy range is originated from the PWN, while the pulsar is dominant above 200 keV. Recent High Energy Stereoscopic System (HESS) observations in the high-energy gamma-ray domain show that PSR J1833−1034 is a bright TeV emitter, with a flux corresponding to ∼2 per cent of the Crab in 1–10 TeV range. In addition, the spectral shape in the TeV energy region matches well with that in the hard X-rays observed by INTEGRAL. Based on these findings, we conclude that the emission from the pulsar and its associated PWN can be described in a scenario where hard X-rays are produced through synchrotron light of electrons with Lorentz factor γ∼ 109 in a magnetic field of ∼10 μG. In this hypothesis, the TeV emission is due to inverse-Compton interaction of the cooled electrons off the cosmic microwave background photons. Search for PSR J1833−1034 X-ray pulsed emission, via RXTE and Swift X-ray observations, resulted in an upper limit that is about 50 per cent.