Is Fermi 1544-0649 a Misaligned Blazar? Discovering the Jet Structure with Very Long Baseline Interferometry
文献类型：期刊论文
| 作者 | Shao, Chengyu1; Cheng, Xiaopeng2; Thomas, Tam Pak-Hin1; Yang, Lili1; Cui, Yudong1; Pal, Partha Sarathi3; Zhang, Zhongli4; Sohn, Bong Won2,5; Sugiyama, Koichiro6; Chen, Wen7,8 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2022-07-01 |
| 卷号 | 934期号:1页码:10 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ac778c |
| 英文摘要 | Fermi J1544-0649 is a transient GeV source first detected during its GeV flares in 2017. Multiwavelength observations during the flaring time demonstrate variability and spectral energy distributions that are typical of a blazar. Other than the flare time, Fermi J1544-0649 is quiet in the GeV band and has looked rather like a quiet galaxy (2MASX J15441967-0649156) for a decade. Together with the broad absorption-lines-like feature we further explore the "misaligned blazar scenario." We analyzed the Very Long Baseline Array (VLBA) and East Asian VLBI Network (EAVN) data from 2018 to 2020 and discovered the four jet components from Fermi J1544-0649. We found a viewing angle around 3.degrees 7 to 7.degrees 4. The lower limit of the viewing angle indicates a blazar with an extreme low duty cycle of gamma-ray emission; the upper limit of it supports the "misaligned blazar scenario." Follow-up multiwavelength observations after 2018 show Fermi J1544-0649 remains quiet in GeV, X-ray, and optical bands. A multimessenger search of neutrinos is also performed, and an excess of 3.1 sigma significance is found for this source. |
| WOS关键词 | ACTIVE GALACTIC NUCLEI ; GHZ METHANOL MASERS ; DOPPLER FACTORS ; QUASARS ; SCIENCE ; ORIGIN ; ANGLES ; MOJAVE |
| 资助项目 | National Natural Science Foundation of China (NSFC)[11633007] ; National Natural Science Foundation of China (NSFC)[12005313] ; National Natural Science Foundation of China (NSFC)[U1731136] ; Guangdong Major Project of Basic and Applied Basic Research[2019B030302001] ; Key Laboratory of TianQin Project (Sun Yat-sen University), Ministry of Education ; China Manned Space Project[CMS-CSST-2021B09] ; Brain Pool Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT[2019H1D3 A1A01102564] ; NSFC[11973099] ; National SKA Program of China[2020SKA0120200] ; Shanghai Astronomical Observatory through an MoU with the NRAO[BT146] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP Publishing Ltd |
| WOS记录号 | WOS:000828876200001 |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Guangdong Major Project of Basic and Applied Basic Research ; Guangdong Major Project of Basic and Applied Basic Research ; Key Laboratory of TianQin Project (Sun Yat-sen University), Ministry of Education ; Key Laboratory of TianQin Project (Sun Yat-sen University), Ministry of Education ; China Manned Space Project ; China Manned Space Project ; Brain Pool Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT ; Brain Pool Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT ; NSFC ; NSFC ; National SKA Program of China ; National SKA Program of China ; Shanghai Astronomical Observatory through an MoU with the NRAO ; Shanghai Astronomical Observatory through an MoU with the NRAO ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Guangdong Major Project of Basic and Applied Basic Research ; Guangdong Major Project of Basic and Applied Basic Research ; Key Laboratory of TianQin Project (Sun Yat-sen University), Ministry of Education ; Key Laboratory of TianQin Project (Sun Yat-sen University), Ministry of Education ; China Manned Space Project ; China Manned Space Project ; Brain Pool Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT ; Brain Pool Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT ; NSFC ; NSFC ; National SKA Program of China ; National SKA Program of China ; Shanghai Astronomical Observatory through an MoU with the NRAO ; Shanghai Astronomical Observatory through an MoU with the NRAO ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Guangdong Major Project of Basic and Applied Basic Research ; Guangdong Major Project of Basic and Applied Basic Research ; Key Laboratory of TianQin Project (Sun Yat-sen University), Ministry of Education ; Key Laboratory of TianQin Project (Sun Yat-sen University), Ministry of Education ; China Manned Space Project ; China Manned Space Project ; Brain Pool Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT ; Brain Pool Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT ; NSFC ; NSFC ; National SKA Program of China ; National SKA Program of China ; Shanghai Astronomical Observatory through an MoU with the NRAO ; Shanghai Astronomical Observatory through an MoU with the NRAO ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Guangdong Major Project of Basic and Applied Basic Research ; Guangdong Major Project of Basic and Applied Basic Research ; Key Laboratory of TianQin Project (Sun Yat-sen University), Ministry of Education ; Key Laboratory of TianQin Project (Sun Yat-sen University), Ministry of Education ; China Manned Space Project ; China Manned Space Project ; Brain Pool Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT ; Brain Pool Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT ; NSFC ; NSFC ; National SKA Program of China ; National SKA Program of China ; Shanghai Astronomical Observatory through an MoU with the NRAO ; Shanghai Astronomical Observatory through an MoU with the NRAO |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/87876]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Cheng, Xiaopeng |
| 作者单位 | 1.Sun Yat Sen Univ, Sch Phys & Astron, Guangzhou 510275, Peoples R China 2.Korea Astron & Space Sci Inst, 776 Daedeok Daero, Daejeon 34055, South Korea 3.Univ Hong Kong, Lab Space Res, Hong Kong, Peoples R China 4.Chinese Acad Sci, Key Lab Radio Astron, Shanghai Astron Observ, Shanghai 200030, Peoples R China 5.Univ Sci & Technol, Dept Astron & Space Sci, 217 Gajeong Ro, Daejeon, South Korea 6.Natl Astron Res Inst Thailand Publ Org, 260 Moo 4, Chiang Mai 50180, Thailand 7.Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China 8.Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shao, Chengyu,Cheng, Xiaopeng,Thomas, Tam Pak-Hin,et al. Is Fermi 1544-0649 a Misaligned Blazar? Discovering the Jet Structure with Very Long Baseline Interferometry[J]. ASTROPHYSICAL JOURNAL,2022,934(1):10. |
| APA | Shao, Chengyu.,Cheng, Xiaopeng.,Thomas, Tam Pak-Hin.,Yang, Lili.,Cui, Yudong.,...&Hao, Longfei.(2022).Is Fermi 1544-0649 a Misaligned Blazar? Discovering the Jet Structure with Very Long Baseline Interferometry.ASTROPHYSICAL JOURNAL,934(1),10. |
| MLA | Shao, Chengyu,et al."Is Fermi 1544-0649 a Misaligned Blazar? Discovering the Jet Structure with Very Long Baseline Interferometry".ASTROPHYSICAL JOURNAL 934.1(2022):10. |
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来源：国家天文台
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