Kavli Affiliate: Linhua Jiang
| First 5 Authors: Ruqiu Lin, Zhen-Ya Zheng, Chunyan Jiang, Fang-Ting Yuan, Luis C. Ho
| Summary:
Recently, the James Webb Space Telescope (JWST) has revealed a new class of
high redshift (high-$z$, $z>4$) compact galaxies which are red in the
rest-frame optical and blue in the rest-frame UV as V-shaped spectral energy
distributions (SEDs), referred to as "Little Red Dots" (LRDs). It is very
likely that LRDs host obscured broad-line active galactic nuclei (AGNs). In the
meanwhile, Green pea galaxies (GPs), which are compact dwarf galaxies at low
redshift, share various similar properties with high redshift star-forming
galaxies. Here we aim to find the connection between the LRDs and GPs hosting
broad-line AGNs (BLGPs). With a sample of 19 BLGPs obtained from our previous
work, we further identify 7 GPs with V-shaped rest-frame UV-to-optical SEDs
that are likely local analogs to LRDs. These V-shaped BLGPs exhibit faint UV
absolute magnitudes and sub-Eddington rates similar to those of LRDs. Three of
them occupy a similar region as LRDs in the BPT diagram, suggesting they have
similar ionization conditions and gas-phase metallicities to LRDs. These
similarities suggest that V-shaped BLGPs can be taken as local analogs of
high-redshift LRDs. In addition, most (16/19) BLGPs, including 6 V-shaped
BLGPs, host over-massive black holes above the local $M_{rm BH}$-$M_{*}$
relation, making it the first sample of galaxies hosting over-massive black
holes at $z<0.4$. These findings will help us learn more about the formation
and co-evolution of early galaxies and black holes.
| Search Query: ArXiv Query: search_query=au:”Linhua Jiang”&id_list=&start=0&max_results=3