A solar-type star polluted by calcium-rich supernova ejecta inside the supernova remnant RCW 86статья
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Дата последнего поиска статьи во внешних источниках: 4 сентября 2018 г.
Аннотация:When a massive star in a binary system explodes as a supernova, its companion star may be polluted with heavy elements from the supernova ejecta. Such pollution has been detected in a handful of post-supernova binaries (Gonzalez Hernández et al. 2011), but none of them is
associated with a supernova remnant. We report the discovery of a binary G star strongly polluted with calcium and other elements at the position of the candidate neutron star [GV2003]
N within the young galactic supernova remnant RCW 86. Our discovery suggests that the progenitor of the supernova that produced RCW 86 could have been a moving star, which exploded near the edge of its wind bubble and lost most of its initial mass because of common-envelope evolution shortly before core collapse, and that the supernova explosion might belong to the class of calcium-rich supernovae — faint and fast transients (Perets et al. 2010; Kasliwal et al. 2012), the origin of which is strongly debated (Kawabata et al. 2010; Waldman et al. 2011; Moriya et al. 2017).