[Okc-wp4] EO meeting March 9th

[Haakon Andresen]

Dear Everyone,


During the EO meeting next week Kaew Samaporn Tinyanont will talk about neutron stars and stripped-envelope supernovae.
I look forward to seeing you all in A5:1003.


Best,
Haakon (on behalf of the EO meeting organizers)


When: Mar 9, 13:00
Where: A5:1003 (AlbaNova Main Building)

Speaker: Kaew Samaporn Tinyanont

Title: Neutron stars and peculiar stripped-envelope supernovae

Abstract:
 Massive  stars end their life when the iron core exceeds the Chandrasekhar mass  limit and collapses.
In the majority of massive stars, a neutron star is  born and the outer envelope gets ejected in a core-collapse supernova.
The neutron star often plays no role in the subsequent cosmic firework;  but when it does, it can create an even more spectacular explosion.
In  this talk, I will discuss two extreme hydrogen-poor, stripped-envelope  supernovae that have likely been powered by a central neutron star.
First, I will discuss SN 2020wnt, a very luminous supernova similar to  the magnetar-powered superluminous supernovae.
But unlike a typical  superluminous supernova, SN 2020wnt only shows weak signatures of the  neutron star at late times.
It is the latest and most luminous member of  a growing class of over luminous but spectroscopically normal  stripped-envelope supernovae.
Second, I will discuss SN 2014C, a  hydrogen-poor supernova that starts interacting strongly with its  progenitor’s lost hydrogen-rich envelope.
Remarkably, very late time  spectra reveal that a different powering mechanism, perhaps from the central neutron star, may be at play.
I will discuss how upcoming  instruments and surveys will help us quantify the roles neutron stars  play in core-collapse supernovae.


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