| Type |
Journal Article |
| Names |
Y. Bai, A. J. Barger, V. Barger, R. Lu, A. D. Peterson, J. Salvado |
| Publication |
Physical Review D |
| Volume |
90 |
| Issue |
6 |
| Pages |
063012 |
| Journal Abbreviation |
Physical Review D |
| Date |
September 1, 2014 |
| DOI |
10.1103/PhysRevD.90.063012 |
| ISSN |
0556-2821 |
| URL |
http://adsabs.org/2014PhRvD.90f3012B |
| Library Catalog |
adslabs.org |
| Abstract |
We investigate whether a subset of high-energy events observed by IceCube may be due to neutrinos from Sagittarius A*. We check both spatial and temporal coincidences of IceCube events with other transient activities of Sagittarius A*. Among the seven IceCube shower events nearest to the Galactic center, we have found that event 25 has a time very close to (around three hours after) the brightest x-ray flare of Sagittarius A* observed by the Chandra X-ray Observatory with a p-value of 0.9%. Furthermore, two of the seven events occurred within one day of each other (there is a 1.6% probability that this would occur for a random distribution in time). Thus, the determination that some IceCube events occur at similar times as x-ray flares and others occur in a burst could be the smoking gun that Sagittarius A* is a point source of very-high-energy neutrinos. We point out that if IceCube Galactic center neutrino events originate from charged pion decays, then TeV gamma rays should come from neutral pion decays at a similar rate. We show that the CTA, HAWC, H.E.S.S. and VERITAS experiments should be sensitive enough to test this. |
| Tags |
Galactic center bar circumnuclear matter and bulge, Neutrino muon pion and other elementary particle detectors, Ordinary neutrinos (nuW bosons, cosmic ray detectors |