SIMBAD references

2018MNRAS.480.3826B - Mon. Not. R. Astron. Soc., 480, 3826-3841 (2018/November-1)

Galactic binaries can explain the Fermi Galactic centre excess and 511 keV emission.


Abstract (from CDS):

The Fermi-LAT Galactic Centre excess and the 511 keV positron-annihilation signal from the inner Galaxy bear a striking morphological similarity. We propose that both can be explained through a scenario in which millisecond pulsars produce the Galactic Centre excess and their progenitors, low-mass X-ray binaries, the 511 keV signal. As a proof of principle, we study a specific population synthesis scenario from the literature involving so-called ultracompact X-ray binaries. Moreover, for the first time, we quantitatively show that neutron star, rather than black hole, low-mass X-ray binaries can be responsible for the majority of the positrons. In this particular scenario, binary millisecond pulsars can be both the source of the Fermi-LAT γ-ray excess and the bulge positrons. Future avenues to test this scenario are discussed.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): gamma-rays : general - Galaxy : bulge - pulsars : general - stars : jets - X-rays : binaries

Simbad objects: 21

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