| HAL : in2p3-00148415, version 1 |
| arXiv : 0704.3895 |
| Code Bibliographique ADS : 2007A&A...469.1005W |
| DOI : 10.1051/0004-6361:20066982 |
| Fiche détaillée | Récupérer au format |
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| Astronomy and Astrophysics 469 (2007) 1005-1012 |
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| SPI observations of the diffuse ^60Fe emission in the Galaxy |
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| W. WangM. J. Harris |
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| (2007) |
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| Gamma-ray line emission from radioactive decay of 60Fe provides constraints on nucleosynthesis in massive stars and supernovae. The spectrometer SPI on board INTEGRAL has accumulated nearly three years of data on gamma-ray emission from the Galactic plane. We have analyzed these data with suitable instrumental-background models and sky distributions to produce high-resolution spectra of Galactic emission. We detect the gamma-ray lines from 60Fe decay at 1173 and 1333 keV, obtaining an improvement over our earlier measurement of both lines with now 4.9 sigma significance for the combination of the two lines. The average flux per line is (4.4 \pm 0.9) \times 10^{-5} ph cm^{-2} s^{-1} rad^{-1} for the inner Galaxy region. Deriving the Galactic 26Al gamma-ray line flux with using the same set of observations and analysis method, we determine the flux ratio of 60Fe/26Al gamma-rays as 0.148 \pm 0.06. The current theoretical predictions are still consistent with our result. |
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| 1 : | AstroParticule et Cosmologie (APC) |
| CNRS : UMR7164 – IN2P3 – Observatoire de Paris – Université Paris VII - Paris Diderot – CEA : DSM/IRFU | |
| 2 : | Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA) |
| CEA : DSM/DAPNIA | |
| 3 : | Centre d'étude spatiale des rayonnements (CESR) |
| CNRS : UMR5187 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III | |
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| APC - Cosmologie et gravitation |
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| Thème(s) | : | Physique/Astrophysique/Cosmologie et astrophysique extra-galactique Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique Planète et Univers/Astrophysique |
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| Lien vers le texte intégral : |
| in2p3-00148415, version 1 | |
| http://hal.in2p3.fr/in2p3-00148415 | |
| oai:hal.in2p3.fr:in2p3-00148415 | |
| Contributeur : Simone Lantz | |
| Soumis le : Mardi 22 Mai 2007, 14:19:01 | |
| Dernière modification le : Lundi 6 Août 2012, 12:15:51 | |