Radio Observations of Four Active Galactic Nuclei Hosting Intermediate-mass Black Hole Candidates: Studying the Outflow Activity and Evolution
文献类型：期刊论文
| 作者 | Yang, Xiaolong8,9 ; Mohan, Prashanth9; Yang, Jun7; Ho, Luis C.5,6; Aditya, J. N. H. S.3,4; Zhang, Shaohua2; Jaiswal, Sumit9; Yang, Xiaofeng1
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2022-12-01 |
| 卷号 | 941期号:1页码:12 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ac9e9d |
| 通讯作者 | Yang, Xiaolong(yangxl@shao.ac.cn) |
| 英文摘要 | Observational searches for intermediate-mass black holes (IMBHs; 10(2)-10(6) M-?) include relatively isolated dwarf galaxies. For those that host active galactic nuclei (AGNs), the IMBH nature may be discerned through the accretion-jet activity. We present radio observations of four AGN-hosting dwarf galaxies, which potentially harbor IMBHs. Very large array (VLA) observations indicate steep spectra (indices of -0.63 to -1.05) between 1.4 and 9 GHz. However, a comparison with the 9 GHz in-band spectral index shows a steepening for GH047 and GH158 (implying older/relic emission) and flattening for GH106 and GH163 (implying recent activity). Overlapping emission regions in the VLA 1.4 GHz and our very long baseline array (VLBA) 1.5 GHz observations, and possibly symmetric pc-scale extensions, are consistent with recent activity in the latter two. Using the compact VLBA radio luminosity, X-ray luminosity (probing the accretion activity), and the black hole masses, all AGNs are found to lie on the empirical fundamental plane relation. The four AGNs are radio-quiet with relatively higher Eddington ratios (0.04-0.32) and resemble X-ray binaries during spectral state transitions that entail an outflow ejection. Furthermore, the radio to X-ray luminosity ratio log R(X )of -3.9 to -5.6 in these four sources support thescenarios that include corona mass ejection from the accretion disk and wind activity. The growth to kpc-scaleslikely proceeds along a similar trajectory to young AGNs and peaked spectrum sources. These complex clues canthus aid in the detection and monitoring of IMBHs in the nearby universe. |
| WOS关键词 | FUNDAMENTAL PLANE ; RELATIVISTIC JETS ; GLOBULAR-CLUSTER ; VLA OBSERVATIONS ; EMISSION MODELS ; ACCRETION FLOWS ; QUASAR FEEDBACK ; DWARF GALAXIES ; PARSEC-SCALE ; COMPACT |
| 资助项目 | Shanghai Sailing Program[21YF1455300] ; China Postdoctoral Science Foundation[2021M693267] ; National Science Foundation of China[12103076] ; National Science Foundation of China[11721303] ; National Science Foundation of China[11991052] ; National Science Foundation of China[12011540375] ; China Manned Space Project[CMS-CSST-2021-A04] ; National Key R&D Program of China[2016YFA0400702] ; CAS Pioneer Hundred Talents Program ; VLBA[BA146] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP Publishing Ltd |
| WOS记录号 | WOS:000898282800001 |
| 资助机构 | Shanghai Sailing Program ; China Postdoctoral Science Foundation ; National Science Foundation of China ; China Manned Space Project ; National Key R&D Program of China ; CAS Pioneer Hundred Talents Program ; VLBA |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5011]  |
| 专题 | 星系宇宙学研究团组 |
| 通讯作者 | Yang, Xiaolong |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Radio Astron, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China 2.Shanghai Normal Univ, Shanghai Key Lab Astrophys, Shanghai 200234, Peoples R China 3.Univ Sydney, Sydney Inst Astron, Sch Phys A28, Camperdown, NSW 2006, Australia 4.ARC Ctr Excellence All Sky Astrophys 3 Dimens ASTR, Stromlo, Australia 5.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China 6.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 7.Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, SE-43992 Onsala, Sweden 8.Chinese Acad Sci, Shanghai Key Lab Space Nav & Positioning Tech, Shanghai Astron Observ, Shanghai 200030, Peoples R China 9.Chinese Acad Sci, Key Lab Radio Astron, Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Xiaolong,Mohan, Prashanth,Yang, Jun,et al. Radio Observations of Four Active Galactic Nuclei Hosting Intermediate-mass Black Hole Candidates: Studying the Outflow Activity and Evolution[J]. ASTROPHYSICAL JOURNAL,2022,941(1):12. |
| APA | Yang, Xiaolong.,Mohan, Prashanth.,Yang, Jun.,Ho, Luis C..,Aditya, J. N. H. S..,...&Yang, Xiaofeng.(2022).Radio Observations of Four Active Galactic Nuclei Hosting Intermediate-mass Black Hole Candidates: Studying the Outflow Activity and Evolution.ASTROPHYSICAL JOURNAL,941(1),12. |
| MLA | Yang, Xiaolong,et al."Radio Observations of Four Active Galactic Nuclei Hosting Intermediate-mass Black Hole Candidates: Studying the Outflow Activity and Evolution".ASTROPHYSICAL JOURNAL 941.1(2022):12. |
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