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Conference Paper: Fermi bubbles: 10 kpc shocks from the Galactic Center?

TitleFermi bubbles: 10 kpc shocks from the Galactic Center?
Authors
KeywordsGalaxies: active
Issue Date2011
Citation
Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011, 2011, v. 7, p. 24-27 How to Cite?
AbstractData from the Fermi-LAT reveal two large gamma-ray bubbles, extending ∼50 degrees above and below the Galactic center, with a width of ∼40 degrees in longitude. The gamma-ray emission associated with these bubbles has a significantly harder spectrum (dN/dE ∼ E.2) than the IC emission from electrons in the Galactic disk, or the gammarays produced by decay of pions from proton-ISM collisions. There is no significant spatial variation in the spectrum or gamma-ray intensity within the bubbles, or between the north and south bubbles. The bubbles are spatially correlated with the hard-spectrum microwave excess known as the WMAP haze; the edges of the bubbles also line up with features in the ROSAT X-ray maps at 1.5 . 2 keV. We argue that these Galactic gamma-ray bubbles were most likely created by some large episode of energy injection in the Galactic center.
Persistent Identifierhttp://hdl.handle.net/10722/226712

 

DC FieldValueLanguage
dc.contributor.authorSu, Meng-
dc.contributor.authorFinkbeiner, Douglas P.-
dc.date.accessioned2016-06-29T01:58:22Z-
dc.date.available2016-06-29T01:58:22Z-
dc.date.issued2011-
dc.identifier.citationProceedings of the 32nd International Cosmic Ray Conference, ICRC 2011, 2011, v. 7, p. 24-27-
dc.identifier.urihttp://hdl.handle.net/10722/226712-
dc.description.abstractData from the Fermi-LAT reveal two large gamma-ray bubbles, extending ∼50 degrees above and below the Galactic center, with a width of ∼40 degrees in longitude. The gamma-ray emission associated with these bubbles has a significantly harder spectrum (dN/dE ∼ E.2) than the IC emission from electrons in the Galactic disk, or the gammarays produced by decay of pions from proton-ISM collisions. There is no significant spatial variation in the spectrum or gamma-ray intensity within the bubbles, or between the north and south bubbles. The bubbles are spatially correlated with the hard-spectrum microwave excess known as the WMAP haze; the edges of the bubbles also line up with features in the ROSAT X-ray maps at 1.5 . 2 keV. We argue that these Galactic gamma-ray bubbles were most likely created by some large episode of energy injection in the Galactic center.-
dc.languageeng-
dc.relation.ispartofProceedings of the 32nd International Cosmic Ray Conference, ICRC 2011-
dc.subjectGalaxies: active-
dc.titleFermi bubbles: 10 kpc shocks from the Galactic Center?-
dc.typeConference_Paper-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.7529/ICRC2011/V07/0763-
dc.identifier.scopuseid_2-s2.0-84899566138-
dc.identifier.volume7-
dc.identifier.spage24-
dc.identifier.epage27-

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