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The Fermi bubbles revisited
Yang, Rui-zhi1,2; Aharonian, Felix1,3,4; Crocker, Roland1,5
2014-07-01
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume567Issue:0Pages:0
AbstractWe analyze 60 months of all-sky data from the Fermi-LAT. The Fermi bubble structures discovered previously are clearly revealed by our analysis. With more data, hence better statistics, we can now divide each bubble into constant longitude slices to investigate their gross gamma-ray spectral morphology. While the detailed spectral behavior of each slice derived in our analysis is somewhat dependent on the assumed background model, we find, robustly, a relative deficit in the flux at low energies (i.e., hardening) toward the top of the south bubble. In neither bubble does the spectrum soften with longitude. The morphology of the Fermi bubbles is also revealed to be energy-dependent: at high energies they are more extended. We conclude from the gamma-ray spectrum at high latitudes that a low energy break in the parent cosmic ray population is required in both leptonic and hadronic models. We briefly discuss possible leptonic and hadronic interpretations of this phenomenology.
KeywordGamma-rays: Ism Cosmic Rays
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1051/0004-6361/201423562
WOS KeywordMICROWAVE-ANISOTROPY-PROBE ; COSMIC-RAY DIFFUSION ; LARGE-AREA TELESCOPE ; MILKY-WAY ; RADIAL-DISTRIBUTION ; INTERSTELLAR-MEDIUM ; GALACTIC-CENTER ; GALAXY ; EMISSION ; PULSARS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000341185300080
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10554
Collection暗物质和空间天文实验室
Affiliation1.Max Planck Inst Kernphys, D-69029 Heidelberg, Germany
2.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
3.Dublin Inst Adv Studies, Dublin 2, Ireland
4.Gran Sasso Sci Inst, I-67100 Laquila, Italy
5.Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia
Recommended Citation
GB/T 7714
Yang, Rui-zhi,Aharonian, Felix,Crocker, Roland. The Fermi bubbles revisited[J]. ASTRONOMY & ASTROPHYSICS,2014,567(0):0.
APA Yang, Rui-zhi,Aharonian, Felix,&Crocker, Roland.(2014).The Fermi bubbles revisited.ASTRONOMY & ASTROPHYSICS,567(0),0.
MLA Yang, Rui-zhi,et al."The Fermi bubbles revisited".ASTRONOMY & ASTROPHYSICS 567.0(2014):0.
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