Massive Black Holes in Low-redshift Compact Emission-line Galaxies: Local Analogs to JWST's Little Red Dots

Abstract:

Recently, the James Webb Space Telescope (JWST) has identified a new class of high-redshift galaxies hosting faint broad-line active galactic nuclei (BLAGNs) characterized by compact morphology, blue rest-UV colors, and red rest-optical colors, referred to as ``Little Red Dots" (LRDs). They can offer valuable insights into the early phase of supermassive black hole growth and the potential roles these faint AGNs may have played in the early Universe, including their influence on cosmic reionization and their host galaxies. 

Green pea galaxies are low-redshift (z<0.4) compact dwarf galaxies with strong [OIII] emission lines and are regarded as local analogs of high-redshift star-forming galaxies. We recently conducted a series of works to build a sample of Green Pea galaxies hosting massive active black holes and to investigate their special subsamples, including LRD analogs and candidate dual AGNs. In my talk, I will first introduce the key properties and significance of Green pea galaxies. I will then present the survey of massive black holes within these galaxies, as well as our findings on LRD analogs and dual AGN candidates, which can deepen our understanding of co-evolution between massive black holes and compact dwarf galaxies and AGN mergers.


Speaker: 
Ruqiu Lin (林如秋), SHAO
Place: 
KIAA Shu Qi meeting room
Time: 
Monday, October 28, 2024 - 1:30PM