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- Lectures
- Institute of Physics
- Location
5F, 1st Meeting Room, Institute of Physics
- Speaker Name
Dr. Wei-Xiang Feng (Shuimu Tsinghua Fellow, Department of Physics, Tsinghua University)
- State
Definitive
- Url
https://www.phys.sinica.edu.tw/lecture_detail.php?id=3160&eng=T
2026-02-09 14:00 - 15:00
Abstract
The James Webb Space Telescope (JWST) has identified a class of compact galaxies at high redshift(4≲z≲8), dubbed “little red dots” (LRDs). The supermassive black holes (SMBHs) in LRDs, with masses 10^5−10^8 M⊙, favor a heavy-seed origin. I will discuss two possible scenarios—both connected to the nature of dark matter—that could explain their origin: the gravothermal core collapse of self-interacting dark matter (SIDM) halos, and small-scale primordial black hole (PBH) clustering. Both scenarios can account for SMBH formation, but their associated gravitational-wave signatures are distinct and can be distinguished by future detectors such as LISA and the Einstein Telescope.
