Reconstuction Approaches to the Hitomi Hxi Image of the Crab Nebula
Abstract
Pulsar wind nebulae emit gamma rays at energies in TeV or higher and are expected as sources of cosmic rays and neutrinos by some models. An hard X-ray observation is known as a powerful probe to peer into the inner pulsar wind nebula, since the synchrotron hard X-ray is related to magnetic field and maximum energy of accelerated electrons of the nebula. So, the morphological properties of the hard X-ray is useful to address an origin of the cosmic rays (e.g., Madsen et al. 2015). The X-ray observatory, Hitomi (ASTRO-H), carries Hard X-ray Telescopes (HXTs), which can focus x-rays up to 80 keV. Combined with the hard x-ray imagers (HXIs) that detect the focused x-rays, imaging spectroscopy in the high energy band from 5 to 80 keV is made possible. We examined Hitomi HXI's Crab archived images using a reconstruction technique. The preliminary reconstructed images indicate an hard X-ray emission is more dominated in torus than in jets. We present a comparison with the previous measurements of Chandra and NuStars and discuss particle acceleration using hard X-ray morphology.
- Publication:
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44th COSPAR Scientific Assembly. Held 16-24 July
- Pub Date:
- July 2022
- Bibcode:
- 2022cosp...44.2125M