SDSS-IV MaNGA: environmental dependence of stellar age and metallicity gradients in nearby galaxies

	SDSS-IV MaNGA: environmental dependence of stellar age and metallicity gradients in nearby galaxies
	Zheng, Zheng1 ; Wang, Huiyuan 2; Ge, Junqiang1 ; Mao, Shude1,3,4,5 ; Li, Cheng 3,4,6; Li, Ran1 ; Mo, Houjun 3,4,7; Goddard, Daniel 8; Bundy, Kevin ; Li, Hongyu 1,9
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2017-03-01
卷号	465 期号:4 页码:4572-4588
关键词	galaxies: abundances galaxies: evolution galaxies: formation galaxies: statistics galaxies: stellar content galaxies: structure
英文摘要	We present a study on the stellar age and metallicity distributions for 1105 galaxies using the STARLIGHT software on MaNGA (Mapping Nearby Galaxies at APO) integral field spectra. We derive age and metallicity gradients by fitting straight lines to the radial profiles, and explore their correlations with total stellar mass M-, NUV - r colour and environments, as identified by both the large-scale structure (LSS) type and the local density. We find that the mean age and metallicity gradients are close to zero but slightly negative, which is consistent with the inside-out formation scenario. Within our sample, we find that both the age and metallicity gradients show weak or no correlation with either the LSS type or local density environment. In addition, we also study the environmental dependence of age and metallicity values at the effective radii. The age and metallicity values are highly correlated with M- and NUV - r and are also dependent on LSS type as well as local density. Low-mass galaxies tend to be younger and have lower metallicity in low-density environments while high-mass galaxies are less affected by environment.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	DIGITAL SKY SURVEY ; INTEGRAL-FIELD SPECTROSCOPY ; STAR-FORMATION HISTORIES ; DISK FORMATION SCENARIOS ; INITIAL MASS FUNCTION ; DARK-MATTER HALOES ; MEDIUM-DEEP SURVEY ; POPULATION GRADIENTS ; COLOR GRADIENTS ; ELLIPTIC GALAXIES
收录类别	SCI
语种	英语
WOS记录号	WOS:000395170200059
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8264]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, A20 Datun Rd, Beijing 100012, Peoples R China 2.Univ Sci & Technol China, Dept Astron, Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China 3.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China 4.Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China 5.Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Oxford Rd, Manchester M13 9PL, Lancs, England 6.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 7.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 8.Univ Portsmouth, Inst Cosmol & Gravitat, Dennis Sciama Bldg, Portsmouth PO1 3FX, Hants, England 9.Univ Tokyo, Kavli IPMU WP, UTIAS, Kashiwa, Chiba 2778583, Japan 10.Univ Alabama, Tuscaloosa, AL 35487 USA
推荐引用方式 GB/T 7714	Zheng, Zheng,Wang, Huiyuan,Ge, Junqiang,et al. SDSS-IV MaNGA: environmental dependence of stellar age and metallicity gradients in nearby galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,465(4):4572-4588.
APA	Zheng, Zheng.,Wang, Huiyuan.,Ge, Junqiang.,Mao, Shude.,Li, Cheng.,...&Malanushenko, Olena.(2017).SDSS-IV MaNGA: environmental dependence of stellar age and metallicity gradients in nearby galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,465(4),4572-4588.
MLA	Zheng, Zheng,et al."SDSS-IV MaNGA: environmental dependence of stellar age and metallicity gradients in nearby galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 465.4(2017):4572-4588.