Young stars in the periphery of the Large Magellanic Cloud

	Young stars in the periphery of the Large Magellanic Cloud
	Moni Bidin, C.1; Casetti-Dinescu, D. I.2; Girard, T. M.3; Zhang, L.4,5 ; Mendez, R. A.6; Vieira, K.7; Korchagin, V. I.8; van Altena, W. F.9
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2017-04-01
卷号	466 期号:3 页码:3077-3087
关键词	stars: early-type Magellanic Clouds
英文摘要	Despite their close proximity, the complex interplay between the two Magellanic Clouds, the Milky Way and the resulting tidal features, is still poorly understood. Recent studies have shown that the Large Magellanic Cloud (LMC) has a very extended disc strikingly perturbed in its outskirts. We search for recent star formation in the far outskirts of the LMC, out to similar to 30. from its centre. We have collected intermediate-resolution spectra of 31 young star candidates in the periphery of the LMC and measured their radial velocity, stellar parameters, distance and age. Our measurements confirm membership to the LMC of six targets, for which the radial velocity and distance values match well with those of the Cloud. These objects are all young (10-50 Myr), main-sequence stars, projected between 7(o) and 13(o) from the centre of the parent galaxy. We compare the velocities of our stars with those of a disc model, and find that our stars have low to moderate velocity differences with the disc model predictions, indicating that they were formed in situ. Our study demonstrates that recent star formation occurred in the far periphery of the LMC, where thus far only old objects were known. The spatial configuration of these newly formed stars appears ring-like with a radius of 12 kpc and a displacement of 2.6 kpc from the LMC's centre. This structure, if real, would be suggestive of a star formation episode triggered by an off-centre collision between the Small Magellanic Cloud and the LMC's disc.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	HORIZONTAL-BRANCH STARS ; SUBDWARF B STARS ; GLOBULAR-CLUSTERS ; CLOSE BINARIES ; WHITE-DWARFS ; STELLAR POPULATIONS ; MASS-DISTRIBUTION ; EHB BINARIES ; CARINA DWARF ; LEADING ARM
收录类别	SCI
语种	英语
WOS记录号	WOS:000398418600040
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8219]
专题	国家天文台_应用天文研究部
作者单位	1.Univ Catolica Norte, Inst Astron, Ave Angamos, Antofagasta 0610, Chile 2.Southern Connecticut State Univ, Dept Phys, 501 Crescent St, New Haven, CT 06515 USA 3.14 Dunn Rd, Hamden, CT 06518 USA 4.CAS South Amer Ctr Astron, Camino Observ, Santiago 1515, Chile 5.Chinese Acad Sci, Natl Astron Observ, Key Lab Optic Astron, 20A Datun Rd, Beijing 100012, Peoples R China 6.Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile 7.Ctr Invest Astron, Apartado Postal 264, Merida 5101A, Venezuela 8.Southern Fed Univ, Inst Phys, Stachki St 124, Rostov Na Donu 344090, Russia 9.Yale Univ, Astron Dept, POB 208101, New Haven, CT 06520 USA
推荐引用方式 GB/T 7714	Moni Bidin, C.,Casetti-Dinescu, D. I.,Girard, T. M.,et al. Young stars in the periphery of the Large Magellanic Cloud[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,466(3):3077-3087.
APA	Moni Bidin, C..,Casetti-Dinescu, D. I..,Girard, T. M..,Zhang, L..,Mendez, R. A..,...&van Altena, W. F..(2017).Young stars in the periphery of the Large Magellanic Cloud.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,466(3),3077-3087.
MLA	Moni Bidin, C.,et al."Young stars in the periphery of the Large Magellanic Cloud".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 466.3(2017):3077-3087.