The Megamaser Cosmology Project. X. High-resolution Maps and Mass Constraints for SMBHs
文献类型：期刊论文
| 作者 | 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 |
| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2018-02-20 |
| 卷号 | 854期号:2页码:12 |
| 关键词 | accretion accretion disks galaxies: active galaxies: ISM galaxies: nuclei galaxies: Seyfert |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aaa95c |
| 通讯作者 | Zhao, W.() |
| 英文摘要 | We 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. |
| WOS关键词 | SUPERMASSIVE BLACK-HOLES ; ACCRETION DISK ; ACTIVE GALAXIES ; CIRCINUS GALAXY ; UGC 3789 ; EMISSION ; PARSEC ; DISCOVERY ; CORRELATE ; DISTANCE |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000425637200006 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/22298]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Zhao, W. |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：紫金山天文台
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