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The Fornax 3D project: Non-linear colour-metallicity relation of globular clusters

文献类型：期刊论文

作者Fahrion, K.8; Lyubenova, M.8; Hilker, M.8; van de Ven, G.9; Falcon-Barroso, J.10,11; Leaman, R.12; Martin-Navarro, I10,11,12,13; Bittner, A.8; Coccato, L.8; Corsini, E. M.14,15
刊名ASTRONOMY & ASTROPHYSICS
出版日期2020-05-07
卷号637页码:14
关键词galaxies: kinematics and dynamics galaxies: star clusters: general galaxies: clusters: individual: Fornax galaxies: evolution
ISSN号0004-6361
DOI10.1051/0004-6361/202037686
英文摘要Globular cluster (GC) systems of massive galaxies often show a bimodal colour distribution. This has been interpreted as a metallicity bimodality, created by a two-stage galaxy formation where the red, metal-rich GCs were formed in the parent halo and the blue metal-poor GCs were accreted. This interpretation, however, crucially depends on the assumption that GCs are exclusively old stellar systems with a linear colour-metallicity relation (CZR). The shape of the CZR and range of GC ages are currently under debate because their study requires high quality spectra to derive reliable stellar population properties. We determined metallicities with full spectral fitting from a sample of 187 GCs with a high spectral signal-to-noise ratio in 23 galaxies of the Fornax cluster that were observed as part of the Fornax 3D project. The derived CZR from this sample is non-linear and can be described by a piecewise linear function with a break point at (g-z) similar to 1.1 mag. The less massive galaxies in our sample (M-*< 10(10) M-) appear to have slightly younger GCs, but the shape of the CZR is insensitive to the GC ages. Although the least massive galaxies lack red, metal-rich GCs, a non-linear CZR is found irrespective of the galaxy mass, even in the most massive galaxies (M-*>= 10(11) M-circle dot). Our CZR predicts narrow unimodal GC metallicity distributions for low mass and broad unimodal distributions for very massive galaxies, dominated by a metal-poor and metal-rich peak, respectively, and bimodal distributions for galaxies with intermediate masses (10(10) <= M-*< 10(11) M-) as a consequence of the relative fraction of red and blue GCs. The diverse metallicity distributions challenge the simple differentiation of GC populations solely based on their colour.
WOS关键词EARLY-TYPE GALAXIES ; STELLAR POPULATION SYNTHESIS ; DWARF GALAXIES ; NGC 5128 ; SPECTROSCOPIC METALLICITIES ; GEMINI/GMOS SPECTRA ; EVOLUTION DATABASE ; VLT SPECTROSCOPY ; ALPHA/FE RATIOS ; SCALED-SOLAR
资助项目European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant[724857] ; Australian Research Council Future Fellowship[FT150100333] ; RAVET project by Spanish Ministry of Science, Innovation and Universities (MCIU)[AYA2016-77237-C3-1P] ; IAC project TRACES ; Consejeria de Economia, Industria, Comercio y Conocimiento of the Canary Islands Autonomous Community ; Spanish Ministry of Economy and Competitiveness (MINECO)[AYA2016-77237-C3-1-P] ; Marie Sklodowska-Curie Individual SPanD Fellowship[702607] ; MIUR grant[PRIN 2017 20173ML3WW_001] ; Padua University[DOR1715817/17] ; Padua University[DOR1885254/18] ; Padua University[DOR1935272/19]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000536754400003
出版者EDP SCIENCES S A
资助机构European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant ; Australian Research Council Future Fellowship ; Australian Research Council Future Fellowship ; RAVET project by Spanish Ministry of Science, Innovation and Universities (MCIU) ; RAVET project by Spanish Ministry of Science, Innovation and Universities (MCIU) ; IAC project TRACES ; IAC project TRACES ; Consejeria de Economia, Industria, Comercio y Conocimiento of the Canary Islands Autonomous Community ; Consejeria de Economia, Industria, Comercio y Conocimiento of the Canary Islands Autonomous Community ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Marie Sklodowska-Curie Individual SPanD Fellowship ; Marie Sklodowska-Curie Individual SPanD Fellowship ; MIUR grant ; MIUR grant ; Padua University ; Padua University ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant ; Australian Research Council Future Fellowship ; Australian Research Council Future Fellowship ; RAVET project by Spanish Ministry of Science, Innovation and Universities (MCIU) ; RAVET project by Spanish Ministry of Science, Innovation and Universities (MCIU) ; IAC project TRACES ; IAC project TRACES ; Consejeria de Economia, Industria, Comercio y Conocimiento of the Canary Islands Autonomous Community ; Consejeria de Economia, Industria, Comercio y Conocimiento of the Canary Islands Autonomous Community ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Marie Sklodowska-Curie Individual SPanD Fellowship ; Marie Sklodowska-Curie Individual SPanD Fellowship ; MIUR grant ; MIUR grant ; Padua University ; Padua University ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant ; Australian Research Council Future Fellowship ; Australian Research Council Future Fellowship ; RAVET project by Spanish Ministry of Science, Innovation and Universities (MCIU) ; RAVET project by Spanish Ministry of Science, Innovation and Universities (MCIU) ; IAC project TRACES ; IAC project TRACES ; Consejeria de Economia, Industria, Comercio y Conocimiento of the Canary Islands Autonomous Community ; Consejeria de Economia, Industria, Comercio y Conocimiento of the Canary Islands Autonomous Community ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Marie Sklodowska-Curie Individual SPanD Fellowship ; Marie Sklodowska-Curie Individual SPanD Fellowship ; MIUR grant ; MIUR grant ; Padua University ; Padua University ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant ; Australian Research Council Future Fellowship ; Australian Research Council Future Fellowship ; RAVET project by Spanish Ministry of Science, Innovation and Universities (MCIU) ; RAVET project by Spanish Ministry of Science, Innovation and Universities (MCIU) ; IAC project TRACES ; IAC project TRACES ; Consejeria de Economia, Industria, Comercio y Conocimiento of the Canary Islands Autonomous Community ; Consejeria de Economia, Industria, Comercio y Conocimiento of the Canary Islands Autonomous Community ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Marie Sklodowska-Curie Individual SPanD Fellowship ; Marie Sklodowska-Curie Individual SPanD Fellowship ; MIUR grant ; MIUR grant ; Padua University ; Padua University
源URL[http://ir.bao.ac.cn/handle/114a11/54783]  
专题中国科学院国家天文台
通讯作者Fahrion, K.
作者单位1.Macquarie Univ, Dept Phys & Astron, N Ryde, NSW 2109, Australia
2.Armagh Observ & Planetarium, Coll Hill, Armagh BT61 9DG, North Ireland
3.Univ Hertfordshire, Ctr Astrophys Res, Coll Lane, Hatfield AL10 9AB, Herts, England
4.Univ Ghent, Sterrenkundig Observatorium, Krijgslaan 281, B-9000 Ghent, Belgium
5.Leiden Univ, Sterrewacht Leiden, Postbus 9513, NL-2300 RA Leiden, Netherlands
6.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
7.Max Planck Inst Extraterr Phys, Giessenbachstr 1, D-85748 Garching, Germany
8.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany
9.Univ Vienna, Dept Astrophys, Turkenschanzstr 17, A-1180 Vienna, Austria
10.Inst Astrofis Canarias, Calle Via Lactea S-N, Tenerife 38200, Spain
推荐引用方式
GB/T 7714		 Fahrion, K.,Lyubenova, M.,Hilker, M.,et al. The Fornax 3D project: Non-linear colour-metallicity relation of globular clusters[J]. ASTRONOMY & ASTROPHYSICS,2020,637:14.
APA Fahrion, K..,Lyubenova, M..,Hilker, M..,van de Ven, G..,Falcon-Barroso, J..,...&Zhu, L..(2020).The Fornax 3D project: Non-linear colour-metallicity relation of globular clusters.ASTRONOMY & ASTROPHYSICS,637,14.
MLA Fahrion, K.,et al."The Fornax 3D project: Non-linear colour-metallicity relation of globular clusters".ASTRONOMY & ASTROPHYSICS 637(2020):14.

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来源：国家天文台

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