J/other/NatAs/2.ivo://CDS.VizieR/J/other/NatAs/2.387doi:10.26093/cds/vizier/dt/ckdihCDSMacias O.Gordon C.Crocker R.M.Coleman B.Paterson D.Horiuchi S.,Pohl M.2026-03-04T20:02:53Z2023-10-03T14:17:03ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalactic-centergamma-ray-astronomyAn anomalous gamma-ray excess emission has been found in the Fermi Large Area Telescope data covering the centre of the Galaxy. Several theories have been proposed for this "Galactic centre excess". They include self-annihilation of dark-matter particles, an unresolved population of millisecond pulsars, an unresolved population of young pulsars, or a series of burst events. Here, we report on an analysis that exploits hydrodynamical modelling to register the position of interstellar gas associated with diffuse Galactic gamma-ray emission. We find evidence that the Galactic centre excess gamma rays are statistically better described by the stellar over-density in the Galactic bulge and the nuclear stellar bulge, rather than a spherical excess. Given its non-spherical nature, we argue that the Galactic centre excess is not a dark-matter phenomenon but rather associated with the stellar population of the Galactic bulge and the nuclear bulge.2018NatAs...2..387Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/NatAs/2.387CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/67 : Incremental Fermi LAT 4th source cat., 4FGL-DR3 (Fermi-LAT 2022)J/ApJ/819/44 : First Fermi-LAT Inner Galaxy point source cat. (Ajello+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/NatAs/2.387https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/NatAs/2.387http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/NatAs/2.387https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/NatAs/2.387https://vizier.iucaa.in/viz-bin/votable?-source=J/other/NatAs/2.387http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/NatAs/2.387GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/NatAs/2.387/table1 (Point Sources detected with TS>=41.8 for the 15{deg}x15{deg} region about the Galactic Center)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/NatAs/2.387/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/other/NatAs/2.387/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/NatAs/2.387/table1?GETtext/xml+votable180.050000true257.8-30.10.0055555555555555565/7206 7228 6/28696 28718 28735 28769 28802 28807-28809 28811-28813 28815 28820 28828 28830-28831 28837 28839 28842 28848 28851 28860 28863 28874-28875 28878 28884 28890 28892 28900-28901 29215 29249 29256-29257 42454 42460-42461 42837https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/NatAs/2.387?format=asciiGamma-raydefaultJ/other/NatAs/2.387/table1Point Sources detected with TS>=41.8 for the 15{deg}x15{deg} region about the Galactic CenterrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (FGCHHMM+DDMM)meta.id;meta.maincharGLON[0/360] Galactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latdoubleRAJ2000Rigth ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainTSTest statistic (for 19 d.o.f)stat.fit.goodnessfloatFluxFlux in 1-100GeV bandph.cm**-2.s**-1phot.flux.density;em.gamma.harddoublee_Fluxrms uncertainty on Fluxph.cm**-2.s**-1stat.error;phot.fluxdoubleSpTypeSpectrum type (PL PLE)meta.notecharSpIndexSpectral indexspect.indexdoublee_SpIndexrms uncertainty on SpIndexstat.errordoubleCutoff? CutoffGeVem.energyfloatnullablee_Cutoff? rms uncertainty on CutoffGeVstat.errorfloatnullableAssocAssociationmeta.id.parentchar