Kev Abazajian
@abazajian.net
Father, husband, particle astrophysicist, Professor of Physics & Astronomy. In public service as Chair of the City of Irvine Sustainability Commission & through the Democratic Party.
Views are my own. repost ≠ endorsement
https://physics.uci.edu/~kevork
Views are my own. repost ≠ endorsement
https://physics.uci.edu/~kevork
She joins the USC Department of Physics & Astronomy as a postdoctoral scholar in December!
November 21, 2025 at 12:04 AM
She joins the USC Department of Physics & Astronomy as a postdoctoral scholar in December!
Many new physics models have been proposed in response to the apparently anomalous JWST galaxies, and we provide the code to test these models when more galaxies are detected and uncertainties are reduced.
November 18, 2025 at 3:55 PM
Many new physics models have been proposed in response to the apparently anomalous JWST galaxies, and we provide the code to test these models when more galaxies are detected and uncertainties are reduced.
The asymmetry is caused by the steeply falling mass function: there are many more smaller galaxies to upscatter into your sample (upper orange curves) than there are larger galaxies to downscatter into it (lower orange curves).
November 18, 2025 at 3:55 PM
The asymmetry is caused by the steeply falling mass function: there are many more smaller galaxies to upscatter into your sample (upper orange curves) than there are larger galaxies to downscatter into it (lower orange curves).
This work led by #UCIrvine NSF Graduate Research Fellow Jay Krishnan shows that systematic uncertainties in the inferred mass, along with the steeply falling halo mass function at these scales, leads to large uncertainties that asymmetrically prefer lower efficiencies.
November 18, 2025 at 3:55 PM
This work led by #UCIrvine NSF Graduate Research Fellow Jay Krishnan shows that systematic uncertainties in the inferred mass, along with the steeply falling halo mass function at these scales, leads to large uncertainties that asymmetrically prefer lower efficiencies.
In the paper, we show that current systematic uncertainties, when combined with the steeply falling mass function of galaxies, relax the apparent tension. We provide the tools to test cosmology as new detections come from JWST. The paper Is scheduled to be on the arXiv tonight.
November 17, 2025 at 7:24 PM
In the paper, we show that current systematic uncertainties, when combined with the steeply falling mass function of galaxies, relax the apparent tension. We provide the tools to test cosmology as new detections come from JWST. The paper Is scheduled to be on the arXiv tonight.
