Supernova neutrinos in a strangeon star model

• 来源期刊: 天文和天体物理学研究
• 年，卷（期）: 2017,（9）
• 页码范围: 39-50
• 页数: 12页
• 语种: 英文
• DOI: 10.1088/1674-4527/17/9/92

摘要

The neutrino burst detected during supernova SN 1987A is explained in a strangeon star model,in which it is proposed that a pulsar-like compact object is composed of strangeons (strangeon:an abbreviation for "strange nucleon").A nascent strangeon star's initial internal energy is calculated,with the inclusion of pion excitation (energy around 1053 erg,comparable to the gravitational binding energy of a collapsed core).A liquid-solid phase transition at temperature ～ 1-2 MeV may occur only a few tens of seconds after core collapse,and the thermal evolution of a strangeon star is then modeled.It is found that the neutrino burst observed from SN 1987A can be reproduced in such a cooling model.