SPI observations of the diffuse 60Fe emission in the Galaxy

Details SPI observations of the diffuse 60Fe emission in the Galaxy SPI observations of the diffuse 60Fe emission in the Galaxy

2007-04-30

arxiv.org/abs/0704.3895v1

Astron.Astrophys.469:1005,2007

Astronomy and Astrophysics

Astrophysics

10 pages, 7 figures, 2 tables, A&A in press

Scientific paper

10.1051/0004-6361:20066982

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.

Affiliated with

Also associated with

No associations

Rating

SPI observations of the diffuse 60Fe emission in the Galaxy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with SPI observations of the diffuse 60Fe emission in the Galaxy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SPI observations of the diffuse 60Fe emission in the Galaxy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-415147