White dwarf collisions and the meteoritic Ne-E annomaly

TL;DR

This paper explores a novel hypothesis that the anomalous neon-22 in meteorites may originate from white dwarf disruptions, challenging the traditional supernova decay explanation.

Contribution

It proposes a new origin for neon-22 anomalies in meteorites, suggesting white dwarf disruptions as an alternative source.

Findings

Neon-22 excess in meteorites may result from white dwarf disruptions.

White dwarf collisions could produce isotopic signatures similar to observed anomalies.

The hypothesis offers a different perspective on the origin of meteoritic noble gases.

Abstract

The analysis of noble gases in primitive meteorites has shown the existence of anomalous isotopic abundances when compared with the average Solar System values. In particular it has been found that some graphite grains contain a unexpected high abundance of neon-22. This excess of neon-22 is usually attributed to the radioactive decay of sodium-22 produced in the O/Ne burning layer of a core collapse supernova. In this talk we speculate about a different origin, the disruption of a crystallized white dwarf by a compact object (white dwarf, neutron star or black hole).