The Fornax3D project: Discovery of ancient massive merger events in the Fornax cluster galaxies NGC 1380 and NGC 1427
文献类型：期刊论文
| 作者 | Zhu, Ling1; van de Ven, Glenn2; Leaman, Ryan2,3; Pillepich, Annalisa3; Coccato, Lodovico4; Ding, Yuchen1; Falcon-Barroso, Jesus5,6; Iodice, Enrichetta4; Martin Navarro, Ignacio5,6; Pinna, Francesca3 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2022-08-15 |
| 卷号 | 664页码:18 |
| ISSN号 | 0004-6361 |
| 关键词 | galaxies: kinematics and dynamics galaxies: structure galaxies: formation galaxies: interactions galaxies: halos |
| DOI | 10.1051/0004-6361/202243109 |
| 英文摘要 | We report the discovery of ancient massive merger events in the early-type galaxies NGC 1380 and NGC 1427, members of the Fornax galaxy cluster. Both galaxies have been observed by the MUSE integral-field-unit instrument on the VLT as part of the Fornax3D project. By fitting recently developed population-orbital superposition models to the observed surface brightness, stellar kinematic, age, and metallicity maps, we obtain the stellar orbits, age, and metallicity distributions of each galaxy. We then decompose each galaxy into multiple orbital-based components, including a dynamically hot inner stellar halo component that is identified as the relic of past massive mergers. By comparing to analogs from cosmological galaxy simulations, chiefly TNG50, we find that the formation of such a hot inner stellar halo requires the merger with a now-destroyed massive satellite galaxy of 3.7(-1.5)(+2.7) x 10(10 )M(circle dot) (about one-fifth of its current stellar mass) in the case of NGC 1380 and of 1.5(-0.7)(-1.6) x 10(10 )M(circle dot) (about one-fourth of its current stellar mass) in the case of NGC 1427. Moreover, we infer that the last massive merger in NGC 1380 happened similar to 10 Gyr ago based on the stellar age distribution of the regrown dynamically cold disk, whereas the merger in NGC 1427 ended t less than or similar to 8 Gyr ago based on the stellar populations in its hot inner stellar halo. The major merger event in NGC 1380 is the first one with both merger mass and merger time quantitatively inferred in a galaxy beyond the local volume. Moreover, it is the oldest and most massive merger uncovered in nearby galaxies so far. |
| WOS关键词 | ILLUSTRISTNG SIMULATIONS ; 3D PROJECT ; ASSEMBLY HISTORIES ; EAGLE SIMULATIONS ; ANDROMEDA GALAXY ; STELLAR HALOES ; THICK ; EVOLUTION ; CALIFA ; MATTER |
| 资助项目 | National Key R&D Program of China[2018YFA0404501] ; National Natural Science Foundation of China[Y945271001] ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme[724857] ; MIUR[20173ML3WW] ; Padua University[DOR1885254/18] ; Padua University[DOR1935272/19] ; Padua University[DOR2013080/20] ; RAVET project from the Spanish Ministry of Science, Innovation and Universities (MCIU)[PID2019-107427GB-C32] ; IAC project TRACES |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | EDP SCIENCES S A |
| WOS记录号 | WOS:000840471000004 |
| 资助机构 | National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; MIUR ; MIUR ; Padua University ; Padua University ; RAVET project from the Spanish Ministry of Science, Innovation and Universities (MCIU) ; RAVET project from the Spanish Ministry of Science, Innovation and Universities (MCIU) ; IAC project TRACES ; IAC project TRACES ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; MIUR ; MIUR ; Padua University ; Padua University ; RAVET project from the Spanish Ministry of Science, Innovation and Universities (MCIU) ; RAVET project from the Spanish Ministry of Science, Innovation and Universities (MCIU) ; IAC project TRACES ; IAC project TRACES ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; MIUR ; MIUR ; Padua University ; Padua University ; RAVET project from the Spanish Ministry of Science, Innovation and Universities (MCIU) ; RAVET project from the Spanish Ministry of Science, Innovation and Universities (MCIU) ; IAC project TRACES ; IAC project TRACES ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; MIUR ; MIUR ; Padua University ; Padua University ; RAVET project from the Spanish Ministry of Science, Innovation and Universities (MCIU) ; RAVET project from the Spanish Ministry of Science, Innovation and Universities (MCIU) ; IAC project TRACES ; IAC project TRACES |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/87675]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Zhu, Ling |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 2.Univ Vienna, Dept Astrophys, Turkenschanzstr 17, A-1180 Vienna, Austria 3.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany 4.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany 5.Inst Astrofis Canarias, Calle Via Lactea S-N, Tenerife 38200, Spain 6.Univ La Laguna, Dept Astrofis, Calle Astrofis Francisco Sanchez S-N, Tenerife 3826, Spain 7.Univ Padua, Dipartimento Fis & Astron G Galilei, Vicolo Osservatorio 3, I-35122 Padua, Italy 8.INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy 9.European Space Agcy ESA, European Space Res & Technol Ctr ESTEC, Keplerlaan 1, NL-2201 AZ Noordwijk, Netherlands 10.Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Ling,van de Ven, Glenn,Leaman, Ryan,et al. The Fornax3D project: Discovery of ancient massive merger events in the Fornax cluster galaxies NGC 1380 and NGC 1427[J]. ASTRONOMY & ASTROPHYSICS,2022,664:18. |
| APA | Zhu, Ling.,van de Ven, Glenn.,Leaman, Ryan.,Pillepich, Annalisa.,Coccato, Lodovico.,...&de Zeeuw, Tim.(2022).The Fornax3D project: Discovery of ancient massive merger events in the Fornax cluster galaxies NGC 1380 and NGC 1427.ASTRONOMY & ASTROPHYSICS,664,18. |
| MLA | Zhu, Ling,et al."The Fornax3D project: Discovery of ancient massive merger events in the Fornax cluster galaxies NGC 1380 and NGC 1427".ASTRONOMY & ASTROPHYSICS 664(2022):18. |
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来源：国家天文台
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