X-ray signature of antistars in the Galaxy

A. E. Bondar, S. I. Blinnikov, A. M. Bykov, A. D. Dolgov, K. A. Postnov

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование


The existence of macroscopic objects from antimatter (antistars) is envisaged in some models of baryogenesis. Searches for antistars have been usually carried out in gamma-rays originated from hadronic annihilation of matter. In astrophysically plausible cases of the interaction of neutral atmospheres or winds from antistars with ionized interstellar gas, the formation of excited pp¯ and Hep¯ atoms precedes the hadronic annihilation. These atoms rapidly cascade down to low levels before annihilation giving rise to a series of narrow lines which can be associated with the hadronic annihilation gamma-ray emission. The most significant are L (3p-2p) 1.73 keV line (yield more than 90%) from pp¯ atoms, and M (4-3) 4.86 keV (yield ∼60%) and L (3-2) 11.13 keV (yield about 25%) lines from 4Hep¯ atoms. These lines can be searched for in dedicated observations by the forthcoming sensitive X-ray spectroscopic missions XRISM, Athena and Lynx and in wide-field X-ray surveys like SRG/eROSITA all-sky survey.

Язык оригиналаанглийский
Номер статьи009
ЖурналJournal of Cosmology and Astroparticle Physics
Номер выпуска3
СостояниеОпубликовано - мар 2022

Предметные области OECD FOS+WOS



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