NAOC Open IR
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 PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume894Issue:1Pages:7
AbstractThe 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.
KeywordRadio continuum emission Local Group Low-luminosity active galactic nuclei
Funding OrganizationNational 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
DOI10.3847/1538-4357/ab855d
WOS KeywordBLACK-HOLE ; PLANETARY-NEBULAE ; ACCRETION FLOWS ; A-ASTERISK ; MODEL ; POPULATION ; SAURON
Language英语
Funding ProjectNational 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 OrganizationNational 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 AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000533312700001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/54925
Collection中国科学院国家天文台
Corresponding AuthorPeng, Sijia
Affiliation1.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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