A solar-type star polluted by calcium-rich supernova ejecta inside the supernova remnant RCW 86

作者：Gvaramadze Vasilii V^*; Langer Norbert; Fossati Luca; Bock Douglas C J; Castro Norberto; Georgiev Iskren Y; Greiner Jochen; Johnston Simon; Rau Arne; Tauris Thomas M

来源：Nature Astronomy, 2017, 1(6): 0116.

DOI：10.1038/s41550-017-0116

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(1), 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(2,3), the origin of which is strongly debated(4-6).

• 出版日期2017-6