Evidence from stable isotopes and 10Be for solar system formation triggered by a low-mass supernova

Projjwal Banerjee, Yong Zhong Qian, Alexander Heger, Wick C Haxton

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14 Citations (Scopus)

Abstract

About 4.6 billion years ago, some event disturbed a cloud of gas and dust, triggering the gravitational collapse that led to the formation of the solar system. A core-collapse supernova, whose shock wave is capable of compressing such a cloud, is an obvious candidate for the initiating event. This hypothesis can be tested because supernovae also produce telltale patterns of short-lived radionuclides, which would be preserved today as isotopic anomalies. Previous studies of the forensic evidence have been inconclusive, finding a pattern of isotopes differing from that produced in conventional supernova models. Here we argue that these difficulties either do not arise or are mitigated if the initiating supernova was a special type, low in mass and explosion energy. Key to our conclusion is the demonstration that short-lived 10Be can be readily synthesized in such supernovae by neutrino interactions, while anomalies in stable isotopes are suppressed.

Original languageEnglish
Article number13639
Number of pages6
JournalNature Communications
Volume7
DOIs
Publication statusPublished - 22 Nov 2016

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