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

Abstract

Observations of the central radian of the Galaxy by the Reuven Ramaty High Energy Solar Spectroscopy Imager (RHESSI) have yielded a high-resolution measurement of the 1809 keV line from 26Al, detected at 11 sigma significance in nine months of data. The RHESSI result for the width of the cosmic line is 2.03 (+0.78, -1.21) keV FWHM. The best fit line width of 5.4 keV FWHM reported by Naya et al. (1996) using the Gamma-Ray Imaging Spectrometer (GRIS) balloon instrument is rejected with high confidence.

arXiv comment9 pages, 1 figure, accepted by The Astrophysical Journal Letters

References in corpus (2)

• Galactic Cosmic Rays from Supernova Remnants: II Shock Acceleration of Gas and Dust
• Gamma-ray limits on Galactic 60Fe nucleosynthesis and implications on the Origin of the 26Al emission

Cited by in corpus (20)

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• Distributions of Short-Lived Radioactive Nuclei Produced by Young Embedded Stellar Clusters
• Formation of GEMS from shock-accelerated crystalline dust in superbubbles
• Nucleosynthesis of Fe60 in massive stars
• Soft X-Ray Observations of Quiescent Solar Active Regions using Novel Dual-zone Aperture X-ray Solar Spectrometer (DAXSS)
• Measuring 26Al and 60Fe in the Galaxy
• The ${}^{59}$Fe(n, γ)${}^{60}$Fe Cross Section from the Surrogate Ratio Method and Its Effect on the ${}^{60}$Fe Nucleosynthesis
• Starbursts and High-Redshift Galaxies are Radioactive: High Abundances of ${}^{26}$Al and Other Short Lived Radionuclides
• The thermal neutron capture cross section of the radioactive isotope ${}^{60}$Fe
• Line shape diagnostics of Galactic 26Al
• Production of 26Al in stellar hydrogen-burning environments: spectroscopic properties of states in 27Si
• New Constraints on Decaying Dark Matter from INTEGRAL/SPI
• Gamma-Ray Line Astronomy
• Ramaty High Energy Solar Spectroscopic Imager (RHESSI)
• Gamma-Ray Line Studies of Nuclei in the Cosmos
• Radioactive Decay