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- Publisher Website: 10.7529/ICRC2011/V07/0763
- Scopus: eid_2-s2.0-84899566138
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Conference Paper: Fermi bubbles: 10 kpc shocks from the Galactic Center?
Title | Fermi bubbles: 10 kpc shocks from the Galactic Center? |
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Authors | |
Keywords | Galaxies: active |
Issue Date | 2011 |
Citation | Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011, 2011, v. 7, p. 24-27 How to Cite? |
Abstract | Data 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 Identifier | http://hdl.handle.net/10722/226712 |
DC Field | Value | Language |
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dc.contributor.author | Su, Meng | - |
dc.contributor.author | Finkbeiner, Douglas P. | - |
dc.date.accessioned | 2016-06-29T01:58:22Z | - |
dc.date.available | 2016-06-29T01:58:22Z | - |
dc.date.issued | 2011 | - |
dc.identifier.citation | Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011, 2011, v. 7, p. 24-27 | - |
dc.identifier.uri | http://hdl.handle.net/10722/226712 | - |
dc.description.abstract | Data 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.language | eng | - |
dc.relation.ispartof | Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011 | - |
dc.subject | Galaxies: active | - |
dc.title | Fermi bubbles: 10 kpc shocks from the Galactic Center? | - |
dc.type | Conference_Paper | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.7529/ICRC2011/V07/0763 | - |
dc.identifier.scopus | eid_2-s2.0-84899566138 | - |
dc.identifier.volume | 7 | - |
dc.identifier.spage | 24 | - |
dc.identifier.epage | 27 | - |