Assistant Professor. Niels Bohr International Academy.
2022: I was just awarded the Lars Kann-Rasmussen Prize for 2022 for my work on GW astrophysics!
2022: I received an ERC Starting Grant! Many new people at the NBIA will now be recruited to expand the GW group! (https://nbia.nbi.ku.dk/news/nbia-news-2022/erc-starting-grant-to-johan-samsing/)
2022: our NATURE paper is out! (https://www.nature.com/articles/s41586-021-04333-1)
as always: please let me know if you want to visit the NBI and the GW group!
I am Louis-Hansen Assistant Professor, Villum-Young Investigator (PI of a 1.6 million $ grant), and Marie Curie Fellow (844629), at the Niels Bohr International Academy (NBIA) in Copenhagen, Denmark. Before joining the Niels Bohr Institute I was Einstein/Spitzer Fellow at Princeton University (see Short BIO below).
Currently, my research interests lie in the new field of Gravitational Wave Astrophysics. I am particular interested in finding new ways of probing the astrophysical origin of binary black hole mergers observable by LIGO/Virgo/KAGRA, and future LISA and Deci-Hetz detectors.
My first-author papers in this field alone have already >800 citations, where >75% of these have been written together with only fellow students and/or postdocs.
The COVID-19 year(s) have not provided the best working conditions for a lot of people including myself. But let's all hope for a productive and healthy 2021, when we can all meet again! Until then, stay safe.
2014-2017: Princeton - Einstein Fellow. 2015-2018: Princeton Society of Fellows. 2018-2019: Princeton - Lyman Spitzer Fellow. 2019-2024: NBIA - Louis-Hansen Ass. Prof. 2019-2021: NBIA - Marie Curie Fellow. 2019-2024: NBIA - Villum-Young Investigator (1.6 million $ grant - see more in News below)
Advised/Co-advised several undergraduate and graduate students from around the world.
My current research is centered on the key question of how binary black hole mergers form in our Universe. In particular, I study dynamical formation where black hole binaries are paired up through chaotic multi-body interactions in dense stellar systems. For this, I have developed both novel analytical and numerical tools that have led to several highly-cited breakthroughs, as outlined below.
My main results relate to the formation of eccentric black hole mergers, which I have proven are a natural outcome of dynamical formation. Together with mass and spin, eccentricity now constitute one of the key parameters that we can use to constrain the astrophysical formation environment of the growing set of GW sources.
ADS-LINK: First statistical solution to the chaotic 3-body problem with GR.
ADS-LINK: First derivation of how eccentric LIGO mergers form in clusters.
ADS-LINK: First derivation of the formation of eccentric LISA sources in clusters.
ADS-LINK: A possible origin of GW190521?
A link to all my publications can be found here: NASA-ADS
NEWS & EVENTS
Summer 2022: Main organizer of international workshop on GW astrophysics (https://indico.nbi.ku.dk/event/1772/)
Summer 2021: Organizing in-person PhD School on GW astrophysics! (https://indico.nbi.ku.dk/event/1558/)
Jan 2021: GW group at the NBIA now complete!! Dan D'Orazio. Johan Samsing. Bin Liu. (see picture below)
Dec 2020: "Black Holes Link up in Strange Ways": In the NEWS with Dan D'Orazio (article)
Nov 2020: Organized "Newest Results from LIGO/Virgo/KAGRA" with Dan D'Orazio (website).
Jan 2020: Main Organizer of the "2. Gravitational Wave Meeting in Denmark" (website)
Jan 2020: Awarded a 1.6 million $ grant and appointed "Villum-Young Investigator" (website)
Aug 2019: Co-organized: "Current Themes in Gravitational Physics" (website)
TALKS & ACTIVITIES