Production of 44Ti in neutrino-driven aspherical supernova explosions

Shin Ichiro Fujimoto, Masaomi Ono, Masa Aki Hashimoto, Kei Kotake

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We examine the synthesis of 44Ti in a neutrino-driven aspherical supernova (SN), focusing on reaction rates related to 44Ti and rotation of a progenitor. We have performed 2D hydrodynamic simulations of SN of a 15M progenitor, whose angular velocity is manually set to be a cylindrical distribution and have followed explosive nucleosynthesis in the ejecta. We find that the faster rates of 40Ca(α,γ)44Ti and the slower rate of 44Ti(α,p)47V lead to more massive ejection of 44Ti and 56Ni and larger ratios <44Ti/ 56Ni>. Faster rotation also results in more massive ejection of 44Ti and 56Ni. Ratios <44Ti/56Ni> are however independent from rotation. Large masses of 44Ti and large ratios <Ti/56Ni> observed in SN 1987A and Cas A (> 1O-4M and 1-2 respectively) are not realized in all the models.

Original languageEnglish
Title of host publicationOrigin of Matter and Evolution of Galaxies 2013 - Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013
PublisherAmerican Institute of Physics Inc.
Pages296-300
Number of pages5
ISBN (Print)9780735412286
DOIs
Publication statusPublished - Jan 1 2014
Event12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013 - Tsukuba, Japan
Duration: Nov 18 2013Nov 21 2013

Publication series

NameAIP Conference Proceedings
Volume1594
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013
CountryJapan
CityTsukuba
Period11/18/1311/21/13

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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