The ${}^{26}$Al Gamma-ray Line from Massive-Star Regions

Abstract

The measurement of gamma rays from the diffuse afterglow of radioactivity originating in massive-star nucleosynthesis is considered a laboratory for testing models, when specific stellar groups are investigated, at known distance and with well-constrained stellar population. Regions which have been exploited for such studies include Cygnus, Carina, Orion, and Scorpius-Centaurus. The Orion region hosts the Orion OB1 association and its subgroups at about 450~pc distance. We report the detection of ${}^{26}$Al gamma rays from this region with INTEGRAL/SPI.

Contribution to Symposium "Nuclei in the Cosmos XIV", Niigata, Japan, Jun 2016; 3 pages, 2 figures; accepted for publication in JPS (Japan Physical Society) Conference Proceedings http://jpscp.jps.jp/

References in corpus (11)

• Radioactive 26Al and massive stars in the Galaxy
• Gas expulsion in massive star clusters? Constraints from observations of young and gas-free objects
• Kinematics of massive star ejecta in the Milky Way as traced by 26Al
• Radioactive 26Al from the Scorpius-Centaurus Association
• Using population synthesis of massive stars to study the interstellar medium near OB associations
• Feedback by massive stars and the emergence of superbubbles II. X-ray properties
• 26Al kinematics: superbubbles following the spiral arms? Constraints from the statistics of star clusters and HI supershells
• Probing the evolving massive star population in Orion with kinematic and radioactive tracers
• New estimates of the gamma-ray line emission of the Cygnus region from INTEGRAL/SPI observations
• Energetic feedback and ${}^{26}$Al from massive stars and their supernovae in the Carina region
• Predicted gamma-ray line emission from the Cygnus complex

Cited by in corpus (2)

• Evolution of radioactive elements in the LMC: predictions for future gamma-ray surveys
• Radioactive Decay