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Constraints on the non-thermal emission from η Carinae's blast wave of 1843

Skilton, J.L., Domainko, W., Hinton, J.A., Jones, D.I., Ohm, S., Urquhart, J.S. (2012) Constraints on the non-thermal emission from η Carinae's blast wave of 1843. Astronomy and Astrophysics, 539 . p. 18434. ISSN 0004-6361. (doi:10.1051/0004-6361/201118434) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:52212)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1051/0004-6361/201118434

Abstract

Non-thermal hard X-ray and high-energy (HE; 1 MeV < E < 100 GeV) γ-ray emission in the direction of η Carinae has been recently detected using the INTEGRAL, AGILE and Fermi satellites. This emission has been interpreted either in the framework of particle acceleration in the colliding wind region between the two massive stars or in the very fast moving blast wave which originates in the historical 1843 "great eruption". Archival Chandra data has been reanalysed to search for signatures of particle acceleration in η Carinae's blast wave. No shell-like structure could be detected in hard X-rays and a limit has been placed on the non-thermal X-ray emission from the shell. The time dependence of the target radiation field of the Homunculus is used to develop a single zone model for the blast wave. Attempting to reconcile the X-ray limit with the HE γ-ray emission using this model leads to a very hard electron injection spectrum dN/dE E with γ < 1.8, harder than the canonical value expected from diffusive shock acceleration.

Item Type: Article
DOI/Identification number: 10.1051/0004-6361/201118434
Additional information: Unmapped bibliographic data: C7 - A101 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - Astron. Astrophys. [Field not mapped to EPrints] AD - Max-Planck-Institut für Kernphysik, PO Box 103980, 69029 Heidelberg, Germany [Field not mapped to EPrints] AD - X-ray and Observational Astronomy Group, Department of Physics and Astronomy, University of Leicester, LE1 7RH, United Kingdom [Field not mapped to EPrints] AD - School of Physics and Astronomy, University of Leeds, LS2 9JP, United Kingdom [Field not mapped to EPrints] AD - CSIRO Astronomy and Space Science, PO Box 76, Epping, NSW 1710, Australia [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: Acceleration of particles, Binaries: general, Gamma rays: stars, Stars: individual: η Carinae, X-rays: stars, Acceleration of particles, Binaries: general, Blast waves, Chandra, Colliding winds, Diffusive shock accelerations, Gamma rays: stars, Hard X ray, High energy, Massive stars, Nonthermal, Nonthermal emission, Particle acceleration, Radiation field, Shell-like structures, Time dependence, X-ray emission, X-rays: stars, Zone model, Gamma rays, Particle accelerators, Stars, X rays
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: James Urquhart
Date Deposited: 30 Nov 2015 15:21 UTC
Last Modified: 29 May 2019 16:28 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/52212 (The current URI for this page, for reference purposes)
Urquhart, J.S.: https://orcid.org/0000-0002-1605-8050
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