Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1051/0004-6361/202037604 |
| Stellar populations across galaxy bars in the MUSE TIMER project | |
| Neumann, Justus1,2; Fragkoudi, Francesca3; Perez, Isabel4,5; Gadotti, Dimitri A.6; Falcon-Barroso, Jesus7,8; Sanchez-Blazquez, Patricia9,10,11; Bittner, Adrian6,12; Husemann, Bernd13; Gomez, Facundo A.14,15; Grand, Robert J. J.3; Donohoe-Keyes, Charlotte E.16; Kim, Taehyun17,18; de Lorenzo-Coceres, Adriana7,8; Martig, Marie16; Mendez-Abreu, Jairo7,8; Pakmor, Ruediger3; Seidel, Marja K.19; van de Ven, Glenn6,13 | |
| 通讯作者 | Neumann, Justus |
| 来源期刊 | ASTRONOMY & ASTROPHYSICS
 |
| ISSN | 0004-6361 |
| EISSN | 1432-0746 |
| 出版年 | 2020 |
| 卷号 | 637 |
| 英文摘要 | Stellar populations in barred galaxies save an imprint of the influence of the bar on the host galaxy's evolution. We present a detailed analysis of star formation histories (SFHs) and chemical enrichment of stellar populations in nine nearby barred galaxies from the TIMER project. We used integral field observations with the MUSE instrument to derive unprecedented spatially resolved maps of stellar ages, metallicities, [Mg/Fe] abundances, and SFHs, as well as H alpha as a tracer of ongoing star formation. We find a characteristic V-shaped signature in the SFH that is perpendicular to the bar major axis, which supports the scenario where intermediate-age stars (similar to 2 - 6 Gyr) are trapped on more elongated orbits shaping a thinner part of the bar, while older stars (> 8 Gyr) are trapped on less elongated orbits shaping a rounder and thicker part of the bar. We compare our data to state-of-the-art cosmological magneto-hydrodynamical simulations of barred galaxies and show that such V-shaped SFHs arise naturally due to the dynamical influence of the bar on stellar populations with different ages and kinematic properties. Additionally, we find an excess of very young stars (< 2 Gyr) on the edges of the bars, predominantly on the leading side, thus confirming typical star formation patterns in bars. Furthermore, mass-weighted age and metallicity gradients are slightly shallower along the bar than in the disc, which is likely due to orbital mixing in the bar. Finally, we find that bars are mostly more metal-rich and less [Mg/Fe]-enhanced than the surrounding discs. We interpret this as a signature that the bar quenches star formation in the inner region of discs, usually referred to as star formation deserts. We discuss these results and their implications on two different scenarios of bar formation and evolution. |
| 英文关键词 | galaxies formation galaxies evolution galaxies stellar content galaxies structure galaxies star formation galaxies kinematics and dynamics |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | England ; Germany ; Spain ; Chile ; South Korea ; USA |
| 开放获取类型 | Green Submitted, Green Accepted |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000536522000001 |
| WOS关键词 | RESOLUTION GALACTIC SPECTRA ; EMISSION-LINE KINEMATICS ; STAR-FORMATION ; EVOLUTION DATABASE ; SECULAR EVOLUTION ; SAURON PROJECT ; INNER BARS ; 3-DIMENSIONAL BARS ; ORBITAL DYNAMICS ; RADIAL MIGRATION |
| WOS类目 | Astronomy & Astrophysics |
| WOS研究方向 | Astronomy & Astrophysics |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/319097 |
| 作者单位 | 1.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England; 2.Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14480 Potsdam, Germany; 3.Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany; 4.Univ Granada, Dept Fis Teor & Cosmos, Fac Ciencias, Edificio Mecenas, Granada 18071, Spain; 5.Univ Granada, Inst Univ Carlos I Fis Teor & Computat, Granada 18071, Spain; 6.European Southern Observ ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany; 7.Inst Astrofis Canarias, Calle Via Lactea S-N, Tenerife 38205, Spain; 8.Univ La Laguna, Dept Astrofis, Tenerife 38200, Spain; 9.Univ Autonoma Madrid, Dept Fis Teor, Canto Blanco 28049, Spain; 10.Univ Complutense Madrid, Fac Ciencias Fis, Inst Fis Particulas, Madrid 28040, Spain; 11.Univ Complutense Madrid, Fac Ciencias Fis, Cosmos IPARCOS, Madrid 28040, Spain; 12.Ludwig Maximilians Univ Munchen, Prof Huber Pl 2, D-80539 Munich, Germany; 13.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany; 14.Univ La Serena, Inst Invest Multidisciplinar Ciencia & Tecnol, La Serena 1305, Chile; 15.Univ La Serena, Dept Astron, Av Juan Cisternas 1200 Norte, La Serena, Chile; 16.Liverpool John Moores Univ, Astrophys Res Inst, IC2, Brownlow Hill, Liverpool L3 5RF, Merseyside, England; 17.Kyungpook Natl Univ, Dept Astron & Atmospher Sci, Daegu 702701, South Korea; 18.Korea Astron & Space Sci Inst, Daejeon 305348, South Korea; 19.Caltech IPAC, MC 314-6,1200 E Calif Blvd, Pasadena, CA 91125 USA |
| 推荐引用方式 GB/T 7714 | Neumann, Justus,Fragkoudi, Francesca,Perez, Isabel,et al. Stellar populations across galaxy bars in the MUSE TIMER project[J],2020,637. |
| APA | Neumann, Justus.,Fragkoudi, Francesca.,Perez, Isabel.,Gadotti, Dimitri A..,Falcon-Barroso, Jesus.,...&van de Ven, Glenn.(2020).Stellar populations across galaxy bars in the MUSE TIMER project.ASTRONOMY & ASTROPHYSICS,637. |
| MLA | Neumann, Justus,et al."Stellar populations across galaxy bars in the MUSE TIMER project".ASTRONOMY & ASTROPHYSICS 637(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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