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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2412.08396 |
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| _version_ | 1866915058894766080 |
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| author | Lin, Ruqiu Zheng, Zhen-Ya Jiang, Chunyan Yuan, Fang-Ting Ho, Luis C. Wang, Junxian Jiang, Linhua Rhoads, James E. Malhotra, Sangeeta Barrientos, L. Felipe Wold, Isak Infante, Leopoldo Zhu, Shuairu Ji, Xiang Fu, Xiaodan |
| author_facet | Lin, Ruqiu Zheng, Zhen-Ya Jiang, Chunyan Yuan, Fang-Ting Ho, Luis C. Wang, Junxian Jiang, Linhua Rhoads, James E. Malhotra, Sangeeta Barrientos, L. Felipe Wold, Isak Infante, Leopoldo Zhu, Shuairu Ji, Xiang Fu, Xiaodan |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_08396 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Discovery of Local Analogs to JWST's Little Red Dots Lin, Ruqiu Zheng, Zhen-Ya Jiang, Chunyan Yuan, Fang-Ting Ho, Luis C. Wang, Junxian Jiang, Linhua Rhoads, James E. Malhotra, Sangeeta Barrientos, L. Felipe Wold, Isak Infante, Leopoldo Zhu, Shuairu Ji, Xiang Fu, Xiaodan Astrophysics of Galaxies 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. |
| title | Discovery of Local Analogs to JWST's Little Red Dots |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2412.08396 |