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SDSS-IV MaNGA: stellar population correlates with stellar root-mean-square velocity V-rms gradients or total-density-profile slopes at fixed effective velocity dispersion sigma(e)
Lu, Shengdong1,2; Cappellari, Michele3; Mao, Shude1,4,5; Ge, Junqiang1; Li, Ran1,6
2020-07-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume495Issue:4Pages:4820-4827
AbstractGalaxy properties are known to correlate most tightly with the galaxy effective stellar velocity dispersion sigma(e). Here, we look for additional trends at fixed sigma(e) using 1339 galaxies (M-* greater than or similar to 6 x 10(9) M-circle dot) with different morphologies in the MaNGA (DR14) sample with integral-field spectroscopy data. We focus on the gradients (gamma(rms) = sigma(R-e/4)/sigma(e)) of the stellar root-mean-square velocity (V-rms root V-2 + sigma 2()), which we show traces the total mass density gradient gamma(tot) derived from dynamical models and, more weakly, the bulge fraction. We confirm that gamma(rms) increases with sigma(e), age, and metallicity. We additionally find that these correlations still exist at fixed sigma(e), where galaxies with larger gamma(rms) are found to be older and more metal-rich. It means that mass density gradients contain information of the stellar population which is not fully accounted for by sigma(e). This result puts an extra constraint on our understanding of galaxy quenching. We compare our results with galaxies in the IllustrisTNG hydrodynamical simulations and find that, at fixed sigma(e), similar trends exist with age, the bulge fraction, and the total mass density slope but, unlike observations, no correlation with metallicity can be detected in the simulations.
Keywordgalaxy: evolution galaxy: kinematics and dynamics galaxies: formation galaxies: structure
Funding OrganizationNational Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Beijing Municipal Natural Science Foundation ; Beijing Municipal Natural Science Foundation ; NAOC Nebula Talents Program ; NAOC Nebula Talents Program ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Beijing Municipal Natural Science Foundation ; Beijing Municipal Natural Science Foundation ; NAOC Nebula Talents Program ; NAOC Nebula Talents Program ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Beijing Municipal Natural Science Foundation ; Beijing Municipal Natural Science Foundation ; NAOC Nebula Talents Program ; NAOC Nebula Talents Program ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Beijing Municipal Natural Science Foundation ; Beijing Municipal Natural Science Foundation ; NAOC Nebula Talents Program ; NAOC Nebula Talents Program
DOI10.1093/mnras/staa1481
WOS KeywordEARLY-TYPE GALAXIES ; TO-LIGHT RATIO ; MULTI-GAUSSIAN EXPANSION ; STAR-FORMATION HISTORIES ; ILLUSTRISTNG SIMULATIONS ; ATLAS(3D) PROJECT ; FUNDAMENTAL PLANE ; AXISYMMETRICAL GALAXIES ; SCALING RELATIONS ; MASS-SIZE
Language英语
Funding ProjectNational Key Research and Development Program of China[2018YFA0404501] ; National Natural Science Foundation of China[11773032] ; National Natural Science Foundation of China[118513] ; Beijing Municipal Natural Science Foundation[1204038] ; NAOC Nebula Talents Program
Funding OrganizationNational Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Beijing Municipal Natural Science Foundation ; Beijing Municipal Natural Science Foundation ; NAOC Nebula Talents Program ; NAOC Nebula Talents Program ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Beijing Municipal Natural Science Foundation ; Beijing Municipal Natural Science Foundation ; NAOC Nebula Talents Program ; NAOC Nebula Talents Program ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Beijing Municipal Natural Science Foundation ; Beijing Municipal Natural Science Foundation ; NAOC Nebula Talents Program ; NAOC Nebula Talents Program ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Beijing Municipal Natural Science Foundation ; Beijing Municipal Natural Science Foundation ; NAOC Nebula Talents Program ; NAOC Nebula Talents Program
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000546679500094
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/82824
Collection中国科学院国家天文台
Corresponding AuthorLu, Shengdong
Affiliation1.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Oxford, Dept Phys, Subdept Astrophys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England
4.Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China
5.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China
6.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Lu, Shengdong,Cappellari, Michele,Mao, Shude,et al. SDSS-IV MaNGA: stellar population correlates with stellar root-mean-square velocity V-rms gradients or total-density-profile slopes at fixed effective velocity dispersion sigma(e)[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,495(4):4820-4827.
APA Lu, Shengdong,Cappellari, Michele,Mao, Shude,Ge, Junqiang,&Li, Ran.(2020).SDSS-IV MaNGA: stellar population correlates with stellar root-mean-square velocity V-rms gradients or total-density-profile slopes at fixed effective velocity dispersion sigma(e).MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,495(4),4820-4827.
MLA Lu, Shengdong,et al."SDSS-IV MaNGA: stellar population correlates with stellar root-mean-square velocity V-rms gradients or total-density-profile slopes at fixed effective velocity dispersion sigma(e)".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 495.4(2020):4820-4827.
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