Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/12215
ชื่อเรื่อง: Searching for the electron/positron pair halo of the Blazar H1426+428 using XMM-Newton
ผู้แต่ง: Kueathan A.
Luangtip W.
Eungwanichayapant A.
Keywords: Beryllium compounds
Cosmology
Electrons
X rays
Cascade process
Cosmic microwave backgrounds
Infrared background
Physical phenomena
Strong magnetic fields
Very high energies
X ray contamination
X-ray emission
Gamma rays
วันที่เผยแพร่: 2019
บทคัดย่อ: Electron/positron pair halo is a physical phenomenon in which the very high energy gamma rays emitted from Blazar interact with cosmic infrared background (CIB) so that produce the electron/positron pairs; the produced electron/positron pairs could up-scatter the cosmic microwave background (CMB) reproducing the gamma-rays, thus these form the cascade process of producing the electron/positron pairs appearing as an halo around the blazar. In case that the halo presents in the ambient strong magnetic field, the electron/positron pairs could emit X-ray light via synchrotron process providing another opportunity to detect the halo. In this work, we search for the X-ray emission from the halo of the Blazar H1426+428 using the observed X-ray data from XMM-Newton observatory. The X-ray spectra of the halo are carefully extracted from the annulus, source free regions around the Blazar to avoid the X-ray contaminations from the Blazar itself and the nearby point sources. These spectra were fitted using the physical model which takes into account the emissions from the unresolved cosmic X-ray and instrument backgrounds. The unresolved flux of 10-13 erg s-1 cm-2 have been detected in the regions, and we argue that, at least, some fraction of the flux might be the emission from the halo. © Published under licence by IOP Publishing Ltd.
URI: https://ir.swu.ac.th/jspui/handle/123456789/12215
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077816923&doi=10.1088%2f1742-6596%2f1380%2f1%2f012117&partnerID=40&md5=7f1a75125e20c82b4a28dc87bccfcdec
ISSN: 17426588
Appears in Collections:Scopus 1983-2021

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