Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-09-17
Mem.Soc.Ast.It.79:50-58,2008
Astronomy and Astrophysics
Astrophysics
9 pages, 4 figures, invited talk submitted to the proceedings of "SIMBOL-X: the hard X-ray Universe in focus" conference, held
Scientific paper
In this contribution we discuss the 44Ti nucleosynthesis gamma-ray lines and their visibility with SIMBOL-X from simulations based on its expected sensitivity and spectro-imaging capabilities. The 44Ti radioactive nucleus can provide invaluable information on the details of supernova explosions. Its lifetime of about 85 yrs makes it the best indicator of the youth of these stellar explosions through its three gamma-ray lines at 67.9, 78.4 keV and 1.157 MeV. We focus on the youngest Galactic supernova remnants, namely: Cassiopeia A, for which the location and Doppler-velocity estimates of the 44Ti-emitting regions in the remnant would offer for the first time a unique view of nucleosynthesis processes which occurred in the innermost layers of the supernova; SN 1987A, in the Large Magellanic Cloud, whose progenitor is known, and for which the expected measurement of these lines would greatly constrain the stellar evolution models; Tycho and Kepler SNRs for which 44Ti lines have never been detected so far. The issue of the "young, missing and hidden" supernova remnants in the Galaxy will also be addressed using SIMBOL-X observations at the position of the 44Ti excesses that wide-field instruments like those onboard INTEGRAL and SWIFT/BAT should be able to reveal.
Ballet Jean
Decourchelle Anne
Lebrun François
Renaud Matthieu
Terrier Régis
No associations
LandOfFree
44Ti nucleosynthesis gamma-ray lines with SIMBOL-X 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 44Ti nucleosynthesis gamma-ray lines with SIMBOL-X, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 44Ti nucleosynthesis gamma-ray lines with SIMBOL-X will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-378969