U Sco 2010 outburst: observational evidence of an underlying ONeMg white dwarf
Solar and Stellar Astrophysics
2015-05-28 v1
Abstract
This paper presents U Sco nebular spectra collected in the period March-May 2010 after the binary outburst on Jan 28, 2010. The spectra display strong [Ne V] and [Ne III] lines that can be used to compute the relative abundance of [Ne/O]. The value obtained ([Ne/O]=1.69) is higher than the typical [Ne/O] abundance found in classical novae from CO progenitors and suggests that U Sco has a ONeMg white-dwarf progenitor. It follows that U Sco will not explode as a SN Ia but rather collapse to become a neutron star or a millisecond pulsar.
Cite
@article{arxiv.1107.4013,
title = {U Sco 2010 outburst: observational evidence of an underlying ONeMg white dwarf},
author = {Elena Mason},
journal= {arXiv preprint arXiv:1107.4013},
year = {2015}
}
Comments
Accepted for publication on A&A Letter; 4 pages 3 figures