University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Monday, February 10th 2020
12:15 pm:
Speaker: Natsumi Nagata, University of Tokyo
Subject:  Limit on the Axion Decay Constant from the Cooling Neutron Star in Cassiopeia A
Candidate for SPA Faculty Position

The observed rapid cooling of the neutron star (NS) located at the center of the supernova
remnant Cassiopeia A (Cas A) can be explained in the standard NS cooling scenario.
This consequence may be changed if there exists an extra cooling source, such as axion emission.
In this talk, I will first give a brief review on the standard NS cooling theory. I will then discuss
the Cas A NS cooling in the presence of axion emission. It turns out that we can obtain a rather
strong limit on the axion decay constant from the Cas A NS cooling observation, which is
as strong as existing limits set by other astrophysical observations such as the SN1987A bound.

The weekly calendar is also available via subscription to the physics-announce mailing list, and by RSS feed.