Speaker
Hannah Brinkman
(Konkoly Observatory, Hungary)
Description
Aluminium-26, a radioactive isotope with a half life of 0.72 Myr, was present in the early Solar System, as inferred from 26 Mg excess in meteorites, see e.g. [1]. It is also detected in the Galaxy via γ-ray observations from COMPTEL and INTEGRAL, see [2]. While it is known that 26 Al is produced in stars, many uncertainties are left related to the production sites and the nuclear physics input. Past research has focused mostly on yields of 26 Al from massive single stars, both rotating and non-rotating, including their winds and supernova explosions, see [3], [4], [5], and [6]. Here we present my planned research that will focus on the yields from massive star winds, primarily Wolf-Rayet stars (>30M), both single and in binary systems, and on the yields from non-conservative mass transfer in binary systems with primary masses >15M . The final goal is to discover the impact of massive binary stars on the galactic abundance of 26 Al and on the origin of the 26 Al in the early Solar System.
References
[1] Jacobsen, B. et al., 2008, Earth and Planetary Science Letters, 272, 353
[2] Diehl, R., 2013, Reports on Progress in Physics, 76, 026301
[3] Limongi, M. and Chieffi, A., 2006, ApJ, 647, 483
[4] Chieffi, A., and Limongi, M., 2013, ApJ, 764, 21
[5] Ekström, S. et al., 2012, AAP, 537, 146
[6] Woosley, S. E. and Heger, A., 2007, Physics Reports, 442, 269
Primary author
Hannah Brinkman
(Konkoly Observatory, Hungary)
