The Reuven Ramaty High Energy Solar Spectroscopic Imager Observation of the 1809 keV Line from Galactic 26 Al | Zendy

David M. Smith | Zendy

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The Reuven Ramaty High Energy Solar Spectroscopic Imager Observation of the 1809 keV Line from Galactic ²⁶ Al

Author(s) -

David M. Smith

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/375795

Subject(s) - physics , spectrometer , full width at half maximum , line (geometry) , astrophysics , cosmic ray , gamma ray , resolution (logic) , galaxy , high energy , high resolution , line width , optics , atomic physics , remote sensing , geometry , mathematics , artificial intelligence , computer science , geology

Observations of the central radian of the Galaxy by the Reuven Ramaty HighEnergy Solar Spectroscopy Imager (RHESSI) have yielded a high-resolutionmeasurement of the 1809 keV line from 26Al, detected at 11 sigma significancein nine months of data. The RHESSI result for the width of the cosmic line is2.03 (+0.78, -1.21) keV FWHM. The best fit line width of 5.4 keV FWHM reportedby Naya et al. (1996) using the Gamma-Ray Imaging Spectrometer (GRIS) ballooninstrument is rejected with high confidence.Comment: 9 pages, 1 figure, accepted by The Astrophysical Journal Letter

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