Implications of the Broad 26A1 1809 keV Line Observed by GRIS

Authors

Wan Chen, NASA/Goddard Space Flight Center - Greenbelt, MD & Department of Astronmy, University of Maryland
Roland Diehl, Max-Planck-Institut für extraterrestrische Physik - Garching, Germany
Neil Gehrel, NASA/Goddard Space Flight Center - Greenbelt, MD
Dieter H. Hartmann, Department of Physics and Astronomy, Clemson UniversityFollow
Mark Leising, Department of Physics and Astronomy, Clemson University
Juan E. Naya, NASA/Goddard Space Flight Center - Greenbelt, MD & Universities Space Research Association
Nikos Prantzos, Institu d' Astrophysique de Paris
Jack Tueller, NASA/Goddard Space Flight Center - Greenbelt, MD
Peter von Ballmoos, Centre d'Etudes Spatialde des Rayonnements - CNR/UPS

Document Type

Article

Publication Date

Fall 9-1-1996

Publication Title

NASA Astrophysics Data System

Publisher

European Space Agency

Abstract

The surprisingly large width of the 1809 ke V gamma-ray line from decay old radioactive Al, recently observed by GRIS (Naya et al. 1996), has profound astrophysical implications. While there may be no apparent, single mechanism that can explain the oberved broadening, wen identify high speed dust grains, extremely hot superbubbles, and a large, low density, gaseous halo in the Galactic center region as the possible origins and iscuss their intriguing revelation of the hot gas content in the ISM.

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