Please use this identifier to cite or link to this item: https://open.uns.ac.rs/handle/123456789/7186
DC FieldValueLanguage
dc.contributor.authorPetrović, Jovanaen_US
dc.contributor.authorSerpico P.en_US
dc.contributor.authorZaharijas G.en_US
dc.date.accessioned2019-09-30T09:00:12Z-
dc.date.available2019-09-30T09:00:12Z-
dc.date.issued2014-10-01-
dc.identifier.urihttps://open.uns.ac.rs/handle/123456789/7186-
dc.description.abstract© 2014 IOP Publishing Ltd and Sissa Medialab srl. Several groups have recently claimed evidence for an unaccounted gamma-ray excess over the diffuse backgrounds at few GeV in the Fermi-LAT data in a region around the Galactic Center, consistent with a dark matter annihilation origin. We demonstrate that the main spectral and angular features of this excess can be reproduced if they are mostly due to inverse Compton emission from high-energy electrons injected in a burst event of ∼ 1052÷1053 erg roughly (106) years ago. We consider this example as a proof of principle that time-dependent phenomena need to be understood and accounted for - together with detailed diffuse foregrounds and unaccounted ''steady state'' astrophysical sources - before any robust inference can be made about dark matter signals at the Galactic Center. In addition, we point out that the timescale suggested by our study, which controls both the energy cutoff and the angular extension of the signal, intriguingly matches (together with the energy budget) what is indirectly inferred by other evidences suggesting a very active Galactic Center in the past, for instance related to intense star formation and accretion phenomena.en
dc.relation.ispartofJournal of Cosmology and Astroparticle Physicsen
dc.titleGalactic Center gamma-ray ''excess'' from an active past of the Galactic Centre?en_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.doi10.1088/1475-7516/2014/10/052-
dc.identifier.scopus2-s2.0-84908620414-
dc.identifier.urlhttps://api.elsevier.com/content/abstract/scopus_id/84908620414-
dc.description.versionUnknownen_US
dc.relation.issue10en
dc.relation.volume2014en
item.fulltextNo Fulltext-
item.grantfulltextnone-
crisitem.author.deptDepartman za fiziku-
crisitem.author.parentorgPrirodno-matematički fakultet-
Appears in Collections:PMF Publikacije/Publications
Show simple item record

SCOPUSTM   
Citations

140
checked on Nov 20, 2023

Page view(s)

44
Last Week
11
Last month
0
checked on May 3, 2024

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.