Electron–positron pair production near the Galactic Centre and the 511 keV emission line

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2 Citations (Scopus)

Abstract

Recent observations indicate that a high production rate of positrons (strong 511 keV line) and a significant amount of excess GeV gamma-ray exist in our Galactic bulge. The latter issue can be explained by ∼40 GeV dark matter annihilation through channel while the former one remains a mystery. On the other hand, recent studies reveal that a large amount of high-density gas might exist near the Galactic Centre million years ago to account for the young, massive stars extending from 0.04–7 pc. In this Letter, I propose a new scenario and show that the 40 GeV dark matter annihilation model can also explain the required positron production rate (511 keV line) in the bulge due to the existence of the high-density gas cloud near the supermassive black hole long time ago. Copyright © 2015 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society.
Original languageEnglish
Pages (from-to)L113-L116
JournalMonthly Notices of the Royal Astronomical Society
Volume456
Issue number1
Early online dateDec 2015
DOIs
Publication statusPublished - Feb 2016

Citation

Chan, M. H. (2016). Electron–positron pair production near the Galactic Centre and the 511 keV emission line. Monthly Notices of the Royal Astronomical Society, 456(1), L113-L116.

Keywords

  • Dark matter
  • Gamma-rays: galaxies

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