Pair Annihilation and Radio Emission from Nova Muscae

D.C. Hannikainen (1 , 2) , C.R. Kaiser (2) ((1) Observatory , University of Helsinki , Finland , (2) Department of Physics & Astronomy , University of Southampton , UK)

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classification 🌌 astro-ph

keywords annihilationemissionmuscaenovapairradiox-rayarising

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In the hard X-ray spectra of some X-ray binaries line features around 500 keV are detected. We interpret these as arising from pair annihilation in relativistic outflows leading to a significant Doppler shift of the frequencies of the lines. We show that a small fraction of pairs escaping the annihilation region may give rise to the radio synchrotron emission observed in Nova Muscae 1991.

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Pair Annihilation and Radio Emission from Nova Muscae

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