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The Megamaser Cosmology Project. X. High-resolution Maps and Mass Constraints for SMBHs
Zhao, W.1,2; Braatz, J. A.3; Condon, J. J.3; Lo, K. Y.3; Reid, M. J.4; Henkel, C.5,6; Pesce, D. W.7; Greene, J. E.8; Gao, F.3,9,10; Kuo, C. Y.11; Impellizzeri, C. M. V.3,12
2018-02-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume854Issue:2Pages:12
Corresponding AuthorZhao, W.()
AbstractWe present high-resolution (submas) Very Long Baseline Interferometry maps of nuclear H2O megamasers for seven galaxies. In UGC. 6093, the well-aligned systemic masers and high-velocity masers originate in an edge-on, flat disk and we determine the mass of the central supermassive black holes (SMBH) to be M-SMBH= 2.58. x. 10(7) M-circle dot (+/- 7%). For J1346+ 5228, the distribution of masers is consistent with a disk, but the faint high-velocity masers are only marginally detected, and we constrain the mass of the SMBH to be in the range (1.5-2.0). x. 10(7) M-circle dot. The origin of the masers in Mrk. 1210 is less clear, as the systemic and high-velocity masers are misaligned and show a disorganized velocity structure. We present one possible model in which the masers originate in a tilted, warped disk, but we do not rule out the possibility of other explanations including outflow masers. In NGC. 6926, we detect a set of redshifted masers, clustered within a parsec of each other, and a single blueshifted maser about 4.4 pc away, an offset that would be unusually large for a maser disk system. Nevertheless, if it is a disk system, we estimate the enclosed mass to be M-SMBH <. 4.8. x. 10(7) M-circle dot. For NGC. 5793, we detect redshifted masers spaced about 1.4 pc from a clustered set of blueshifted features. The orientation of the structure supports a disk scenario as suggested by Hagiwara et al. We estimate the enclosed mass to be M-SMBH <. 1.3. x. 10(7) M-circle dot. For NGC 2824 and J0350-0127, the masers may be associated with parsec-or subparsec-scale jets or outflows.
Keywordaccretion accretion disks galaxies: active galaxies: ISM galaxies: nuclei galaxies: Seyfert
DOI10.3847/1538-4357/aaa95c
WOS KeywordSUPERMASSIVE BLACK-HOLES ; ACCRETION DISK ; ACTIVE GALAXIES ; CIRCINUS GALAXY ; UGC 3789 ; EMISSION ; PARSEC ; DISCOVERY ; CORRELATE ; DISTANCE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000425637200006
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22299
Collection中国科学院紫金山天文台
Corresponding AuthorZhao, W.
Affiliation1.Shanghai Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
3.Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA
4.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
5.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
6.King Abdulaziz Univ, POB 80203, Jeddah, Saudi Arabia
7.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA
8.Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA
9.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
10.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
11.Natl Sun Yat Sen Univ, Dept Phys, 70 Lianhai Rd, Kaohsiung 804, Taiwan
12.Joint Alma Off, Alsonso De Cordova 3107, Santiago, Chile
Recommended Citation
GB/T 7714
Zhao, W.,Braatz, J. A.,Condon, J. J.,et al. The Megamaser Cosmology Project. X. High-resolution Maps and Mass Constraints for SMBHs[J]. ASTROPHYSICAL JOURNAL,2018,854(2):12.
APA Zhao, W..,Braatz, J. A..,Condon, J. J..,Lo, K. Y..,Reid, M. J..,...&Impellizzeri, C. M. V..(2018).The Megamaser Cosmology Project. X. High-resolution Maps and Mass Constraints for SMBHs.ASTROPHYSICAL JOURNAL,854(2),12.
MLA Zhao, W.,et al."The Megamaser Cosmology Project. X. High-resolution Maps and Mass Constraints for SMBHs".ASTROPHYSICAL JOURNAL 854.2(2018):12.
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