KMS National Astronomical Observatories, CAS
| Resolving the Nuclear Radio Emission from M32 with the Very Large Array | |
| Peng, Sijia1,2; Li, Zhiyuan1,2; Sjouwerman, Lorant O.3; Yang, Yang4,5; Xie, Fuguo4,6; Yuan, Feng4,6 | |
| 2020-05-01 | |
| Source Publication | ASTROPHYSICAL JOURNAL
 |
| ISSN | 0004-637X |
| Volume | 894Issue:1Pages:7 |
| Abstract | The Local Group dwarf elliptical galaxy M32 hosts one of the nearest and most under-luminous supermassive black holes (SMBHs) ever known, offering a rare opportunity to study the physics of accreting SMBHs at the most quiescent state. Recent Very Large Array (VLA) observations detected a radio source at the nucleus of M32, which was suggested to be the radio counterpart of the SMBH. To further investigate the radio properties of this nuclear source, we have conducted follow-up, high-resolution VLA observations in four epochs between 2015 and 2017, each with dual frequencies. At 6 GHz, the nuclear source is resolved under an angular resolution of similar to 04, exhibiting a coreless, slightly lopsided morphology with a detectable extent of similar to 25 (similar to 10 pc). No significant variability can be found among the four epochs. At 15 GHz, no significant emission can be detected within the same region, pointing to a steep intrinsic radio spectrum (with a 3 sigma upper limit of -1.46 for the spectral index). We discuss possible scenarios for the nature of this nuclear radio source and conclude that a stellar origin, in particular, planetary nebulae, X-ray binaries, supernova remnants, or diffuse ionized gas powered by massive stars, can be ruled out. Instead, the observed radio properties can be explained by synchrotron radiation from a hypothetical wind driven by the weakly accreting SMBH. |
| Keyword | Radio continuum emission Local Group Low-luminosity active galactic nuclei |
| Funding Organization | National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS |
| DOI | 10.3847/1538-4357/ab855d |
| WOS Keyword | BLACK-HOLE ; PLANETARY-NEBULAE ; ACCRETION FLOWS ; A-ASTERISK ; MODEL ; POPULATION ; SAURON |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2016YFA0400704] ; National Key Research and Development Program of China[2017YFA0402703] ; National Key Research and Development Program of China[2016YFA0400804] ; National Natural Science Foundation of China[11873028] ; National Natural Science Foundation of China[11473010] ; Natural Science Foundation of China[11633006] ; Natural Science Foundation of China[11873074] ; Youth Innovation Promotion Association of CAS[2016243] |
| Funding Organization | National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000533312700001 |
| Publisher | IOP PUBLISHING LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.bao.ac.cn/handle/114a11/54925 |
| Collection | 中国科学院国家天文台 |
| Corresponding Author | Peng, Sijia |
| Affiliation | 1.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Peoples R China 2.Nanjing Univ, Key Lab Modern Astron & Astrophys, Nanjing 210023, Peoples R China 3.Natl Radio Astron Observ, Socorro, NM 87801 USA 4.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 5.Chinese Acad Sci, Key Lab Radio Astron, Shanghai, Peoples R China 6.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai, Peoples R China |
| Recommended Citation GB/T 7714 | Peng, Sijia,Li, Zhiyuan,Sjouwerman, Lorant O.,et al. Resolving the Nuclear Radio Emission from M32 with the Very Large Array[J]. ASTROPHYSICAL JOURNAL,2020,894(1):7. |
| APA | Peng, Sijia,Li, Zhiyuan,Sjouwerman, Lorant O.,Yang, Yang,Xie, Fuguo,&Yuan, Feng.(2020).Resolving the Nuclear Radio Emission from M32 with the Very Large Array.ASTROPHYSICAL JOURNAL,894(1),7. |
| MLA | Peng, Sijia,et al."Resolving the Nuclear Radio Emission from M32 with the Very Large Array".ASTROPHYSICAL JOURNAL 894.1(2020):7. |
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