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The VIRUS-P Exploration of Nearby Galaxies (VENGA): the stellar populations and assembly of NGC 2903's bulge, bar, and outer disc

文献类型：期刊论文

作者Carrillo, Andreia1; Jogee, Shardha1; Drory, Niv2; Kaplan, Kyle F.3; Blanc, Guillermo4,5; Weinzirl, Tim6; Song, Mimi7; Luo, Rongxin8
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2020-04-01
卷号493期号:3页码:4094-4106
ISSN号0035-8711
关键词galaxies: formation galaxies: fundamental parameters galaxies: spiral
DOI10.1093/mnras/staa397
英文摘要We study the stellar populations and assembly of the nearby spiral galaxy NGC 2903's bulge, bar, and outer disc using the VIRUS-P Exploration of Nearby Galaxies IFS survey. We observe NGC 2903 with a spatial resolution of 185 pc using the Mitchell Spectrograph's 4.25 arcsec fibres at the 2.7 Harlan J. Smith telescope. Bulge-bar-disc decomposition on the Two Micron All-Sky Survey (2MASS) K-s-band image of NGC 2903 shows that it has similar to 6 per cent, 6 per cent, and 88 per cent, of its stellar mass in the bulge, bar, and outer disc, respectively, and its bulge has a low Sersic index of similar to 0.27, suggestive of a discy bulge. We perform stellar population synthesis and find that the outer disc has 46 per cent of its mass in stars >5 Gyr, 48 per cent in stars between 1 and 5 Gyr, and <10 per cent in younger stars. Its stellar bar has 65 per cent of its mass in ages 1-5 Gyr and has metallicities similar to the outer disc, suggestive of the evolutionary picture where the bar forms from disc material. Its bulge is mainly composed of old high-metallicity stars though it also has a small fraction of young stars. We find enhanced metallicity in the spiral arms and central region, tracing areas of high star formation as seen in the H alpha map. These results are consistent with the idea that galaxies of low bulge-to-total mass ratio and low bulge Sersic index like NGC 2903 has not had a recent major merger event, but has instead grown mostly through minor mergers and secular processes.
WOS关键词M-CIRCLE-DOT ; STAR-FORMATION ; METALLICITY GRADIENTS ; EVOLUTION DATABASE ; SECULAR EVOLUTION ; SCALING RELATIONS ; CENTRAL REGION ; SCALED-SOLAR ; MODELS ; ALPHA
资助项目National Science Foundation (NSF)[AST-1413652] ; NSF[AST-1614798] ; NSF[AST-1757983] ; McDonald Observatory ; Department of Astronomy Board of Visitors ; LSSTC ; NSF Cybertraining Grant[1829740] ; Brinson Foundation ; Moore Foundation ; National Aeronautics and Space Administration ; National Science Foundation
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000526035600076
资助机构National Science Foundation (NSF) ; National Science Foundation (NSF) ; NSF ; NSF ; McDonald Observatory ; McDonald Observatory ; Department of Astronomy Board of Visitors ; Department of Astronomy Board of Visitors ; LSSTC ; LSSTC ; NSF Cybertraining Grant ; NSF Cybertraining Grant ; Brinson Foundation ; Brinson Foundation ; Moore Foundation ; Moore Foundation ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Science Foundation ; National Science Foundation ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; NSF ; NSF ; McDonald Observatory ; McDonald Observatory ; Department of Astronomy Board of Visitors ; Department of Astronomy Board of Visitors ; LSSTC ; LSSTC ; NSF Cybertraining Grant ; NSF Cybertraining Grant ; Brinson Foundation ; Brinson Foundation ; Moore Foundation ; Moore Foundation ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Science Foundation ; National Science Foundation ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; NSF ; NSF ; McDonald Observatory ; McDonald Observatory ; Department of Astronomy Board of Visitors ; Department of Astronomy Board of Visitors ; LSSTC ; LSSTC ; NSF Cybertraining Grant ; NSF Cybertraining Grant ; Brinson Foundation ; Brinson Foundation ; Moore Foundation ; Moore Foundation ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Science Foundation ; National Science Foundation ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; NSF ; NSF ; McDonald Observatory ; McDonald Observatory ; Department of Astronomy Board of Visitors ; Department of Astronomy Board of Visitors ; LSSTC ; LSSTC ; NSF Cybertraining Grant ; NSF Cybertraining Grant ; Brinson Foundation ; Brinson Foundation ; Moore Foundation ; Moore Foundation ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Science Foundation ; National Science Foundation
源URL[http://ir.bao.ac.cn/handle/114a11/55991]  
专题中国科学院国家天文台
通讯作者Carrillo, Andreia
作者单位1.Univ Texas Austin, Dept Astron, 2515 Speedway,Stop C1400, Austin, TX 78712 USA
2.McDonald Observ, 2515 Speedway,Stop C1400, Austin, TX 78712 USA
3.NASA, Ames Res Ctr, Dept Astron, SOFIA USRA, MS N232-12, Moffett Field, CA 94035 USA
4.Observ Carnegie Inst Sci, 813 Santa Barbara St, Pasadena, CA 91101 USA
5.Univ Chile, Dept Astron, Castilla 36-D, Santiago, Chile
6.Univ Nottingham, Sch Phys & Astron, Univ Pk, Nottingham NG7 2RD, England
7.Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA
8.Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
推荐引用方式
GB/T 7714		 Carrillo, Andreia,Jogee, Shardha,Drory, Niv,et al. The VIRUS-P Exploration of Nearby Galaxies (VENGA): the stellar populations and assembly of NGC 2903's bulge, bar, and outer disc[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,493(3):4094-4106.
APA Carrillo, Andreia.,Jogee, Shardha.,Drory, Niv.,Kaplan, Kyle F..,Blanc, Guillermo.,...&Luo, Rongxin.(2020).The VIRUS-P Exploration of Nearby Galaxies (VENGA): the stellar populations and assembly of NGC 2903's bulge, bar, and outer disc.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,493(3),4094-4106.
MLA Carrillo, Andreia,et al."The VIRUS-P Exploration of Nearby Galaxies (VENGA): the stellar populations and assembly of NGC 2903's bulge, bar, and outer disc".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 493.3(2020):4094-4106.

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来源：国家天文台

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