干旱区生态环境知识资源中心(Arid): Redistribution of stars and gas in the star formation deserts of barred galaxies

Arid

DOI	10.1093/mnras/stz2474
	Redistribution of stars and gas in the star formation deserts of barred galaxies
	Donohoe-Keyes, C. E.1; Martig, M.1; James, P. A.1; Kraljic, K.2
通讯作者	Donohoe-Keyes, C. E.
来源期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
EISSN	1365-2966
出版年	2019
卷号	489 期号:4 页码:4992-5003
英文摘要	Bars strongly influence the distribution of gas and stars within the central regions of their host galaxies. This is particularly pronounced in the star formation desert (SFD) which is defined as two symmetrical regions either side of the bar that show a deficit in young stars. Previous studies proposed that, if star formation is truncated because of the influence of the bar, then the age distribution of stars within the SFD could be used to determine the epoch of bar formation. To test this, we study the properties of SFDs in six galaxies from zoom-in cosmological re-simulations. Age maps reveal old regions on both sides of the bars, with a lack of stars younger than 10 Myr, confirming the SFD phenomenon. Local star formation is truncated in the SFDs because after the bar forms, gas in these regions is removed on 1 Gyr time-scales. However, the overall age distribution of stars in the SFD does not show a sharp truncation after bar formation but rather a gradual downturn in comparison to that of the bar. This more subtle signature may still give information on bar formation epochs in observed galaxies, but the interpretation will be more difficult than originally hoped. The gradual drop in the SFD age distribution, instead of a truncation, is due to radial migration of stars born in the disc. The SFD is thus one of the only regions where an uncontaminated sample of stars only affected by radial migration can be studied.
英文关键词	galaxies: ISM galaxies: kinematics and dynamics galaxies: spiral galaxies: stellar content galaxies: structure
类型	Article
语种	英语
国家	England ; Scotland
开放获取类型	Green Submitted, Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000489302400042
WOS关键词	CENTRAL MASS CONCENTRATIONS ; SIMULATED DISC GALAXIES ; SECULAR EVOLUTION ; SPIRAL GALAXIES ; SPATIAL-DISTRIBUTION ; RADIAL-DISTRIBUTION ; STELLAR POPULATION ; FORMATION RATES ; CENTRAL REGION ; MOLECULAR GAS
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
EI主题词	2019-11-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310407
作者单位	1.Liverpool John Moores Univ, Astrophys Res Inst, IC2, Brownlow Hill, Liverpool L3 5RF, Merseyside, England; 2.Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland
推荐引用方式 GB/T 7714	Donohoe-Keyes, C. E.,Martig, M.,James, P. A.,et al. Redistribution of stars and gas in the star formation deserts of barred galaxies[J],2019,489(4):4992-5003.
APA	Donohoe-Keyes, C. E.,Martig, M.,James, P. A.,&Kraljic, K..(2019).Redistribution of stars and gas in the star formation deserts of barred galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,489(4),4992-5003.
MLA	Donohoe-Keyes, C. E.,et al."Redistribution of stars and gas in the star formation deserts of barred galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 489.4(2019):4992-5003.