Detection of gamma-ray lines from interstellar 60Fe by the high resolution spectrometer SPI

Details Detection of gamma-ray lines from interstellar 60Fe by the high resolution spectrometer SPI Detection of gamma-ray lines from interstellar 60Fe by the high resolution spectrometer SPI

2005-02-10

arxiv.org/abs/astro-ph/0502219v2

Astron.Astrophys. 433 (2005) L49-L52

Astronomy and Astrophysics

Astrophysics

4pp., 5 Figs., accepted by Astronomy & Astrophysics (letter), ref.'s comments included

Scientific paper

10.1051/0004-6361:200500093

It is believed that core-collapse supernovae (CCSN), occurring at a rate about once per century, have seeded the interstellar medium with long-lived radioisotopes such as 60Fe (half-life 1.5 Myr), which can be detected by the gamma rays emitted when they beta-decay. Here we report the detection of the 60Fe decay lines at 1173 keV and 1333 keV with fluxes 3.7 +/- 1.1 x 10(-5) ph cm(-2) s(-1) per line, in spectra taken by the SPI spectrometer on board INTEGRAL during its first year. The same analysis applied to the 1809 keV line of 26Al yielded a line flux ratio 60Fe/26Al = 0.11 +/- 0.03. This supports the hypothesis that there is an extra source of 26Al in addition to CCSN.

Affiliated with

Also associated with

No associations

Rating

Detection of gamma-ray lines from interstellar 60Fe by the high resolution spectrometer SPI 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 Detection of gamma-ray lines from interstellar 60Fe by the high resolution spectrometer SPI, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of gamma-ray lines from interstellar 60Fe by the high resolution spectrometer SPI will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-546395