Leo Kim
@jjlkim.bsky.social
I like dark matter pheno and cosmology :)
Postdoc @ YorkU in Canada
Postdoc @ YorkU in Canada
Pinned
Leo Kim
@jjlkim.bsky.social
· Apr 17
Dimming Starlight with Dark Compact Objects
Compact objects formed from dark matter could be detected by examining the dimming of background light when the dark objects pass across the line of sight with Earth.
journals.aps.org
A bit late, but happy that our work was published in PRL last week! With Melissa Diamond and @joebramante.bsky.social, we explored a new way to search for diffuse clumps of dark matter if dark matter and photons interact. Check it out!
journals.aps.org/prl/abstract...
journals.aps.org/prl/abstract...
Reposted by Leo Kim
Today, Dr. Art McDonald joined students and leaders from Queen's University and NSERC to reflect on the legacy of the SNO experiment on the 10th anniversary of receiving the Nobel Prize in Physics with Dr. Takaaki Kajita for the discovery of neutrino oscillation. Read more at bit.ly/3W8GHHt
October 17, 2025 at 8:19 PM
Today, Dr. Art McDonald joined students and leaders from Queen's University and NSERC to reflect on the legacy of the SNO experiment on the 10th anniversary of receiving the Nobel Prize in Physics with Dr. Takaaki Kajita for the discovery of neutrino oscillation. Read more at bit.ly/3W8GHHt
... and part II of our gravitational wave bias work is out! Huge thanks to Dorsa for leading the work~
"Modeling Gravitational Wave Bias from 3D Power Spectra of Spectroscopic Surveys" is out!🔭
Led by Dorsa Sadat Hosseini and a great collaboration with Amir Dehghani, Leo Kim, Alex Krolewski, and Suvodip Mukherjee across different institutes.
@jjlkim.bsky.social
@perimeterinstitute.ca @uwaterloo.ca
Led by Dorsa Sadat Hosseini and a great collaboration with Amir Dehghani, Leo Kim, Alex Krolewski, and Suvodip Mukherjee across different institutes.
@jjlkim.bsky.social
@perimeterinstitute.ca @uwaterloo.ca
The Gravitational Wave Bias Parameter from Angular Power Spectra: Bridging Between Galaxies and Binary Black Holes
https://arxiv.org/pdf/2411.11965
Amir Dehghani, J. Leo Kim, Dorsa Sadat Hosseini, Alex Krolewski, Suvodip Mukherjee, Ghazal Geshnizjani
https://arxiv.org/pdf/2411.11965
Amir Dehghani, J. Leo Kim, Dorsa Sadat Hosseini, Alex Krolewski, Suvodip Mukherjee, Ghazal Geshnizjani
June 18, 2025 at 1:06 PM
... and part II of our gravitational wave bias work is out! Huge thanks to Dorsa for leading the work~
Reposted by Leo Kim
Who were the first to discover the cosmic glow of the Big Bang, known as the CMB (or cosmic microwave background)?
Hint: It’s not who you think it is.
Hint: It’s not who you think it is.
Is much of what is taught about the Big Bang just wrong ? Well quite a bit is, in this series @nafshordi.bsky.social and I expose common Big Bang myths. First up the discovery of the CMB www.youtube.com/watch?v=R4bU...
10 Big Bang Myths Debunked #1: The CMB
YouTube video by Phil Halper (aka Skydivephil)
www.youtube.com
May 13, 2025 at 6:30 PM
Who were the first to discover the cosmic glow of the Big Bang, known as the CMB (or cosmic microwave background)?
Hint: It’s not who you think it is.
Hint: It’s not who you think it is.
Reposted by Leo Kim
Attention physicists! The abstract deadline for the 2025 Women+ in Physics Canada Conference has been extended to May 2! Share your research with a national audience committed to advancing gender equity in physics. WIPC+ is open to all physicists - please share and encourage others to submit!
April 21, 2025 at 6:37 PM
Attention physicists! The abstract deadline for the 2025 Women+ in Physics Canada Conference has been extended to May 2! Share your research with a national audience committed to advancing gender equity in physics. WIPC+ is open to all physicists - please share and encourage others to submit!
A bit late, but happy that our work was published in PRL last week! With Melissa Diamond and @joebramante.bsky.social, we explored a new way to search for diffuse clumps of dark matter if dark matter and photons interact. Check it out!
journals.aps.org/prl/abstract...
journals.aps.org/prl/abstract...
Dimming Starlight with Dark Compact Objects
Compact objects formed from dark matter could be detected by examining the dimming of background light when the dark objects pass across the line of sight with Earth.
journals.aps.org
April 17, 2025 at 6:32 PM
A bit late, but happy that our work was published in PRL last week! With Melissa Diamond and @joebramante.bsky.social, we explored a new way to search for diffuse clumps of dark matter if dark matter and photons interact. Check it out!
journals.aps.org/prl/abstract...
journals.aps.org/prl/abstract...
The C. N. Yang Institute for Theoretical Physics at Stony Brook! Had a great time visiting to give a seminar. Thanks for the invite and the fun discussions~!
April 12, 2025 at 2:43 PM
The C. N. Yang Institute for Theoretical Physics at Stony Brook! Had a great time visiting to give a seminar. Thanks for the invite and the fun discussions~!
Reposted by Leo Kim
If you’ve been hoping origin of cosmos could be less dramatic than current affairs, here’s a rigorous work by Amir Dehghani, Jerome Quintin & me showing Cuscuton bounce has no strong coupling problems & is within observational non-Gaussianity bounds.
#cosmology @perimeterinstitute.ca @uwaterloo.ca
#cosmology @perimeterinstitute.ca @uwaterloo.ca
Cuscuton Bounce Beyond the Linear Regime: Bispectrum and Strong Coupling Constraints. Amir Dehghani et. al. https://arxiv.org/abs/2503.01992
March 5, 2025 at 4:29 PM
If you’ve been hoping origin of cosmos could be less dramatic than current affairs, here’s a rigorous work by Amir Dehghani, Jerome Quintin & me showing Cuscuton bounce has no strong coupling problems & is within observational non-Gaussianity bounds.
#cosmology @perimeterinstitute.ca @uwaterloo.ca
#cosmology @perimeterinstitute.ca @uwaterloo.ca
Reposted by Leo Kim
This Thursday, Feb 27th, join us at @themansionkingston for Astronomy on Tap! A fabulous evening of Astro/Particle Physics and science Trivia! See you there!
February 25, 2025 at 9:21 PM
This Thursday, Feb 27th, join us at @themansionkingston for Astronomy on Tap! A fabulous evening of Astro/Particle Physics and science Trivia! See you there!
Reposted by Leo Kim
Michael S. Turner and Lawrence M. Widrow's 1988 Phys.Rev.D article
"Inflation Produced, Large Scale Magnetic Fields"
inspirehep.net/literature/2...
reaches 1,000 citations.
#topcites
"Inflation Produced, Large Scale Magnetic Fields"
inspirehep.net/literature/2...
reaches 1,000 citations.
#topcites
December 6, 2024 at 6:18 PM
Michael S. Turner and Lawrence M. Widrow's 1988 Phys.Rev.D article
"Inflation Produced, Large Scale Magnetic Fields"
inspirehep.net/literature/2...
reaches 1,000 citations.
#topcites
"Inflation Produced, Large Scale Magnetic Fields"
inspirehep.net/literature/2...
reaches 1,000 citations.
#topcites
Thanks to all my collaborators, especially Amir for leading the work! Always a great learning experience working with @ghazalgesh.bsky.social 😁. Be on the lookout for part 2 led by Dorsa 👀
Paper day🎉 1st of the duo finally out! Thanks to Leo Kim @jjlkim.bsky.social Dorsa Hosseini Alex Krolewski Suvodip Mukherjee. Especially Amir Dehghani who took on some of the toughest challenges includong working wth a very meticulous supervisor & saw them through brilliantly.
#gravitationalwaves
#gravitationalwaves
The Gravitational Wave Bias Parameter from Angular Power Spectra: Bridging Between Galaxies and Binary Black Holes. Amir Dehghani et. al. https://arxiv.org/abs/2411.11965
November 20, 2024 at 1:23 PM
Thanks to all my collaborators, especially Amir for leading the work! Always a great learning experience working with @ghazalgesh.bsky.social 😁. Be on the lookout for part 2 led by Dorsa 👀