[Okc-wp4] EO seimar on the 25th of April

[Stephan Rosswog]

Hi Haakon

I’d like to join via zoom if that is possible.

Cheers
Stephan

On 19 Apr 2024, at 14:55, Haakon Andresen via Okc-wp4-at-fysik.su.se<http://Okc-wp4-at-fysik.su.se> <okc-wp4-at-fysik.su.se at lists.su.se<mailto:okc-wp4-at-fysik.su.se at lists.su.se>> wrote:

Dear Everyone,

Next week we will have a seminar by James Gillanders.

Best,
Haakon (on behalf of the organizers)

When and where: Thursday 25th April, 13:15 in A5:1003

Speaker: James Gillanders, Postdoc at Oxford
Title: Identifying heavy r-process elements in the spectra of two compact binary mergers
Abstract: Kilonovae are the optical counterpart associated with the radioactive decay of an ensemble of freshly synthesised unstable isotopes produced by the rapid neutron-capture process (r-process). The r-process is responsible for synthesising approximately half of all elements beyond the iron peak. Direct observations of r-process nucleosynthesis are limited; to date, the only observed production site remains binary neutron star mergers. These merger systems evolve rapidly and are intrinsically faint compared to virtually all other known extragalactic transients, and so remain elusive to wide-field surveys optimised to search for such events. While there are proposed detections of ~10 kilonova events, only two of these have been observed spectroscopically – AT2017gfo/GRB170817A and AT2023vfi/GRB230307A. In this talk, I will present the spectral observations that exist for kilonovae, with a focus on the heavy r-process element identifications that can be extracted from such observations. Specifically, I will present the results of my recent work to constrain the composition of AT2017gfo, both at early and late times. I will also highlight new work on the exciting JWST spectral observations of AT2023vfi, and what we can extract from these near-infrared, late-time observations.


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okc-wp4 at albanova.se<mailto:okc-wp4 at albanova.se> mailing list

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Prof. Dr. Stephan Rosswog
Computational High-Energy Astrophysics

The Oskar Klein Centre for Cosmoparticle Physics
Department of Astronomy, Stockholm University
AlbaNova, Roslagstullbacken 21
SE-10691 Stockholm, Sweden

Email: stephan.rosswog at astro.su.se<mailto:stephan.rosswog at astro.su.se>
Tel.:     +46 (0)8 5537 8529
URL:   http://compact-merger.astro.su.se/

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