English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

{"Bare collapse", the collapse of a bare stellar core to a neutron star witha very small mass ejection links two seemingly unrelated phenomena: theformation of binary neutron star (BNS) systems and the observations of fast andluminous optical transients. We carried out calculations of the collapse due toelectron-capture of both evolutionary and synthetic isentropic bare stellarcores. We find that the collapse results in {the formation of} a light ~ 1.3solar mass neutron star and {an} ejection of ~0.1 solar mass at ~0.1c. Theouter shell of the ejecta is composed of Ni56 that can power an ultra-strippedsupernova. The models we explored can explain most of the observed fast opticalflares but not the brightest ones. Collapse of cores surrounded by somewhatmore massive envelopes can produce larger amounts of Ni56 and explain brighterflares. Alternatively, those events can arise due to interaction of the veryenergetic ejecta with winds that were ejected from the progenitor a few daysbefore the collapse.

Bare Collapse, Formation of Neutron Star Binaries and Fast Optical Transients