Kilonova in GW170817 and implications to the r-process origin


Event Location
Online seminar via zoom

Event Audience
Graduate Students

Event Hosted By

Seminar Recording

Seminar Recording

Event Contact

Dr. Mohammad Safarzadeh

Arizona State University


kilonovae light curve

Kenta Hotokezaka

Department of Astrophysics, Princeton University, USA


The discovery of the first binary neutron star merger, GW170817, in both gravitational waves and electromagnetic signals opened a new era of gravitational-wave astrophysics.  In this talk, I will particularly focus on kilonova.  The bolometric light curve and late-time spectra provide us with evidence for the r-process element production in the merger. The estimated mass of the produced r-process elements is about 0.05 Msun, which seems to be sufficient for mergers to supply all the r-process elements in the Galaxy. I will also talk about the possible mechanisms responsible for such a large amount of ejecta from neutron star star mergers. Furthermore, I will discuss the merger scenario of the r-process origin has difficulties to explain the observed history of the Galactic r-process production.