Author Archive

The CEJSN r-process scenario (October 2018) 

Written by Noam Soker on . Posted in News

 

In a new paper Aldana Grichener and I study r-process feasibility inside jets launched by a cold neutron star (NS) spiralling-in inside the core of a giant star, and find that such common envelope jets supernova (CEJSN) events might be a significant source of heavy r-process elements in the early Universe.  To account for the r-process abundances in the Galaxy we require that one in ten cases of a NS entering the envelope of a giant star ends as a CEJSN r-process event.

Live poster in the Shocking Supernovae meeting (June 2018)

Written by Noam Soker on . Posted in News

In the meeting  Shocking Supernovae (Stockholm May 28 – June 1, 2018)  I presented a live poster. I updated it every day, presenting my personal view on many talks and posters.  In the picture on the right I stand near my poster on jets, and my personal summary of the first day of the meeting.  

I gave the last talk of the meeting, where I also presented my personal summary of he meeting.  

The summary of the first 4 days can be found here.  The summary talk is here

 

 

Common Envelope Jets Supernova (November 2017)

Written by Noam Soker on . Posted in News

In a new paper Avishai Gilkis and I proposed a common envelope jets supernova scenario for the enigmatic supernova iPTF14hls where a neutron star that spirals-in inside the envelope of a massive giant star accretes mass and launches jets that power the ejection of the circumstellar shell and a few weeks later the explosion itself.

Live poster (July 2017)

Written by Noam Soker on . Posted in News

In the meeting The IMPACT of BINARIES on STELLAR EVOLUTION (ESO Garching, July 3-7, 2017), I presented a live poster. I updated it twice a day, referring to many talks and posters. 

Click on an image to enlarge it and you can read the poster on the far right. 

Core collapse supernova remnants with ears (November 2016)

Written by Noam Soker on . Posted in News

In a new paper Aldana Grichener and I study the morphologies of core collapse supernova remnantzfigcs (CCSNRs) and find that about third of CCSNRs have two opposite `ears’ protruding from their main shell, and that the typical energy that is required to inflate these ears is about 10 percents of the explosion kinetic energy. We argue that these properties are most compatible with the expectation from the explosion jet feedback mechanism (JFM). This study further supports the call for a paradigm shift from neutrino-driven to jet-driven core-collapse supernova mechanisms.

A popular summary of our research is in New Scientist.