Al(26) Studies with INTEGRAL's Spectrometer SPI

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dc.creatorDiehl, R.
dc.creatorKretschmer, K.
dc.creatorLichti, G.
dc.creatorSchönfelder, V.
dc.creatorStrong, A. W.
dc.creatorvon Kienlin, A.
dc.creatorKnödlseder, J.
dc.creatorJean, P.
dc.creatorLonjou, V.
dc.creatorWeidenspointner, G.
dc.creatorRoques, J. -P.
dc.creatorVedrenne, G.
dc.creatorSchanne, S.
dc.creatorMowlavi, N.
dc.creatorWinkler, C.
dc.creatorWunderer, C.
dc.date2004-05-11
dc.date.accessioned2026-07-07T02:13:09Z
dc.date.available2026-07-07T02:13:09Z
dc.descriptionAl(26) radioactivity traces recent nucleosynthesis throughout the Galaxy, and is known to be produced in massive stars and novae. The map from its decay gamma-ray line suggests massive stars to dominate, but high-resolution line spectroscopy is expected to supplement imaging of Al(26) source regions and thus to help decide about the Al(26) injection process and interstellar environment, hence about the specific massive-star subgroup and phase which produces interstellar Al(26). The INTEGRAL Spectrometer SPI has observed Galactic Al(26) radioactivity in its 1809 keV gamma-ray line during its first inner-Galaxy survey. Instrumental background lines make analysis difficult; yet, a clear signal from the inner Galaxy agrees with expectations. In particular, SPI has constrained the line width to exclude previously-reported line broadenings corresponding to velocities >500 km/s. The signal-to-background ratio of percent implies that detector response and background modeling need to be fine-tuned to eventually enable line shape deconvolution in order to extract source location information along the line of sight.
dc.description6 pages; Proc. 5th INTEGRAL workshop, Munich, Feb. 2004
dc.identifierhttps://arxiv.org/abs/astro-ph/0405192
dc.identifierhttp://arxiv.org/abs/astro-ph/0405192
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7714
dc.subjectAstrophysics
dc.titleAl(26) Studies with INTEGRAL's Spectrometer SPI
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