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INTEGRAL/SPI Observations of Electron-Positron Annihilation Radiation from our GalaxyThe spectrometer on INTEGRAL (SPI) is a coded-aperture gamma-ray telescope with moderate angular resolution (3 deg) and superior energy resolution (2 keV at 511 kev). One of it's principal science goals is the detailed study of 511 keV electron-positron annihilation from our Galaxy. The origin of this radiation remains a mystery, however current morphological studies suggest an older stellar population. There has also been recent speculation on the possibility of the existence of light (< 100 MeV) dark matter particles whose annihilation or decay could produce the observed 511 keV emission. In this paper we summarize the current results from SPI, compare them with previous results and discuss their implication on possible models for the production of the annihilation radiation.
Document ID
20050132040
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Teegarden, B. J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Watanabe, K.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Knoedlseder, J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Jean, P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lonjou, V.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Weidenspointer, G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Skinner, G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Vedrenne, G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Roques, J.-P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Schanne, S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Schoenfelder, V.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2005
Subject Category
Space Radiation
Meeting Information
Meeting: AAS Meeting
Location: San Diego, CA
Country: United States
Start Date: January 1, 2005
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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