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The modified equipartition calculation for supernova remnants with the spectral index α = 0.5

Published online by Cambridge University Press:  05 March 2015

Dejan Urošević ,
Marko Z. Pavlović ,
Bojan Arbutina  and
Aleksandra Dobardžić
Dejan Urošević
Affiliation:
Department of Astronomy, Faculty of Mathematics, University of Belgrade Studentski trg 16, 11000 Belgrade, Serbia email: dejanu@matf.bg.ac.rs
Marko Z. Pavlović
Affiliation:
Department of Astronomy, Faculty of Mathematics, University of Belgrade Studentski trg 16, 11000 Belgrade, Serbia email: dejanu@matf.bg.ac.rs
Bojan Arbutina
Affiliation:
Department of Astronomy, Faculty of Mathematics, University of Belgrade Studentski trg 16, 11000 Belgrade, Serbia email: dejanu@matf.bg.ac.rs
Aleksandra Dobardžić
Affiliation:
Department of Astronomy, Faculty of Mathematics, University of Belgrade Studentski trg 16, 11000 Belgrade, Serbia email: dejanu@matf.bg.ac.rs
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Abstract

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Recently, the modified equipartition calculation for supernova remnants (SNRs) has been derived by Arbutina et al. (2012). Their formulae can be used for SNRs with the spectral indices between 0.5 < α < 1. Here, by using approximately the same analytical method, we derive the equipartition formulae useful for SNRs with spectral index α=0.5. These formulae represent next step upgrade of Arbutina et al. (2012) derivation, because among 30 Galactic SNRs with available observational parameters for the equipartition calculation, 16 have spectral index α = 0.5. For these 16 Galactic SNRs we calculated the magnetic field strengths which are approximately 40 per cent higher than those calculated by using Pacholczyk (1970) equipartition and similar to those calculated by using Beck & Krause (2005) calculation.

Keywords

ISM: magnetic fieldsISM: supernova remnantsradio continuum: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Highlights H16: Highlights of Astronomy , August 2012 , pp. 398
Copyright
Copyright © International Astronomical Union 2015 

References

Arbutina, B., Urošević, D., Andjelić, M. M., Pavlović, M. Z., & Vukotić, B. 2012, ApJ, 746, 79CrossRefGoogle Scholar
Beck, R. & Krause, M. 2005, Astron. Nachr., 326, 414CrossRefGoogle Scholar
Pacholczyk, A. G. 1970, Radio Astrophysics (San Francisco, CA: Freeman)Google Scholar