Revisiting the Extended Schmidt Law: The Important Role of Existing Stars in Regulating Star Formation

doi:10.3847/1538-4357/aaa3e6

CORC > 国家天文台 > 中国科学院国家天文台

	Revisiting the Extended Schmidt Law: The Important Role of Existing Stars in Regulating Star Formation
	Shi, Yong 9,10; Yan, Lin 11; Armus, Lee 11; Gu, Qiusheng 9,10; Helou, George 11; Qiu, Keping 9,10; Gwyn, Stephen 2; Stierwalt, Sabrina 1; Fang, Min 3,4; Chen, Yanmei 9,10
刊名	ASTROPHYSICAL JOURNAL
	2018-02-01
卷号	853 期号:2 页码:9
关键词	galaxies: evolution galaxies: starburst ISM: atoms ISM: molecules stars: formation
ISSN号	0004-637X
DOI	10.3847/1538-4357/aaa3e6
英文摘要	We revisit the proposed extended Schmidt law, which posits that the star formation efficiency in galaxies depends on the stellar mass surface density, by investigating spatially resolved star formation rates (SFRs), gas masses, and stellar masses of star formation regions in a vast range of galactic environments, from the outer disks of dwarf galaxies, to spiral disks and to merging galaxies, as well as individual molecular clouds in M33. We find that these regions are distributed in a tight power law as Sigma(SFR) proportional to (Sigma(0.5)(star)Sigma(gas))(1.09), which is also valid for the integrated measurements of disk and merging galaxies at high-z. Interestingly, we show that star formation regions in the outer disks of dwarf galaxies with Sigma(SFR) down to 10(-5) M(circle dot)yr(-1) kpc(-2), which are outliers of both the Kennicutt-Schmidt and Silk-Elmegreen laws, also follow the extended Schmidt law. Other outliers in the Kennicutt-Schmidt law, such as extremely metal-poor star formation regions, also show significantly reduced deviation from the extended Schmidt law. These results suggest an important role for existing stars in helping to regulate star formation through the effect of their gravity on the midplane pressure in a wide range of galactic environments.
资助项目	National Key R&D Program of China[2017YFA0402704] ; National Natural Science Foundation of China (NSFC)[11773013] ; National Natural Science Foundation of China (NSFC)[11733002] ; National Natural Science Foundation of China (NSFC)[11373021] ; Excellent Youth Foundation of the Jiangsu Scientific Committee[BK20150014] ; NSFC[11473011] ; NSFC[11590781] ; Association of Universities for Research in Astronomy, Inc. under NASA[NAS 5-26555] ; ALMA[2011.0.00182.S] ; Smithsonian Institution ; Academia Sinica
WOS关键词	NEARBY GALAXIES ; H-I ; FORMATION EFFICIENCY ; INFRARED GALAXIES ; FORMING GALAXIES ; FORMATION RATES ; GALACTIC DISKS ; POOR GALAXIES ; GAS ; CALIBRATION
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000424011300010
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Excellent Youth Foundation of the Jiangsu Scientific Committee ; NSFC ; Association of Universities for Research in Astronomy, Inc. under NASA ; ALMA ; Smithsonian Institution ; Academia Sinica ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Excellent Youth Foundation of the Jiangsu Scientific Committee ; NSFC ; Association of Universities for Research in Astronomy, Inc. under NASA ; ALMA ; Smithsonian Institution ; Academia Sinica ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Excellent Youth Foundation of the Jiangsu Scientific Committee ; NSFC ; Association of Universities for Research in Astronomy, Inc. under NASA ; ALMA ; Smithsonian Institution ; Academia Sinica ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Excellent Youth Foundation of the Jiangsu Scientific Committee ; NSFC ; Association of Universities for Research in Astronomy, Inc. under NASA ; ALMA ; Smithsonian Institution ; Academia Sinica
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/35697]
专题	中国科学院国家天文台
通讯作者	Shi, Yong
作者单位	1.Univ Virginia, Dept Astron, POB 400325, Charlottesville, VA 22904 USA 2.Natl Res Council Canada, NRC Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada 3.Univ Arizona, Dept Astron, 933 N Cherry Ave, Tucson, AZ 85721 USA 4.Univ Arizona, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85721 USA 5.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing, Peoples R China 6.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China 7.Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland 8.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 9.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China 10.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Shi, Yong,Yan, Lin,Armus, Lee,et al. Revisiting the Extended Schmidt Law: The Important Role of Existing Stars in Regulating Star Formation[J]. ASTROPHYSICAL JOURNAL,2018,853(2):9.
APA	Shi, Yong.,Yan, Lin.,Armus, Lee.,Gu, Qiusheng.,Helou, George.,...&Wang, Junzhi.(2018).Revisiting the Extended Schmidt Law: The Important Role of Existing Stars in Regulating Star Formation.ASTROPHYSICAL JOURNAL,853(2),9.
MLA	Shi, Yong,et al."Revisiting the Extended Schmidt Law: The Important Role of Existing Stars in Regulating Star Formation".ASTROPHYSICAL JOURNAL 853.2(2018):9.