Carbon-oxygen and oxygen-neon classical novae are Galactic7Li producers

S. Starrfield, M. Bose, C. Iliadis, W. R. Hix, C. E. Woodward, R. M. Wagner

Research output: Contribution to journalConference articlepeer-review

Abstract

We report on studies of classical nova (CN) explosions where we follow the evolution of thermonuclear runaways (TNRs) on carbon oxygen (CO) and oxygen-neon (ONe) white dwarfs (WDs). Our simulations are guided by the results of multi-dimensional studies of TNRs in WDs which find that sufficient mixing with WD core material occurs after the TNR is well underway, reaching levels of enrichment that agree with observations of CN ejecta abundances. Our results show large enrichments of7Be in the ejected gases implying that CNe may be responsible for a significant fraction (∼ 100 M) of the7Li in the galaxy (∼1000 M). In addition, the WDs in these simulations are ejecting less material than they accrete. We, therefore, predict that the WDs can grow in mass as a consequence of the TNR and CNe may be an important channel of Supernova Ia progenitors.

Original languageEnglish (US)
Pages (from-to)175-179
Number of pages5
JournalMemorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society
Volume91
Issue number1-2
StatePublished - 2020
Event2019 Lithium in the Universe: to Be or not to Be? - Monte Porzio Catone, Italy
Duration: Nov 18 2019Nov 22 2019

Keywords

  • Stars: abundances
  • Stars: Classical novae
  • Stars: lithium

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Radiology Nuclear Medicine and imaging
  • Astronomy and Astrophysics
  • Instrumentation
  • Atomic and Molecular Physics, and Optics

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