Young stars in the periphery of the Large Magellanic Cloud
Young stars in the periphery of the Large Magellanic Cloud
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大麦哲伦星云外围的年轻恒星
DOI:
10.1093/mnras/stw3242
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发表时间:
2016-12
影响因子:
4.8
通讯作者:
van Altena William F.
中科院分区:
文献类型:
--
作者:
Zhang Lan;Korchagin Vladimir I;Vieira Katherine;van Altena William F.
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 disk strikingly perturbed in its outskirts. We search for recent star formation in the far outskirts of the LMC, out to ~30 degrees from its center. We have collected intermediate-resolution spectra of thirty-one 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 those of the Cloud. These objects are all young (10-50 Myr), main-sequence stars projected between 7 and 13 degrees from the center of the parent galaxy. We compare the velocities of our stars with those of a disk model, and find that our stars have low to moderate velocity differences with the disk 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 center. This structure, if real, would be suggestive of a star-formation episode triggered by an off-center collision between the Small Magellanic Cloud and the LMC's disk.
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DOI:
10.1007/978-94-011-3230-5_8
发表时间:
1992-07
期刊:
--
影响因子:
--
作者:
P. Bergeron;R. Saffer;J. Liebert
通讯作者:
P. Bergeron;R. Saffer;J. Liebert
DOI:
10.1088/2041-8205/784/2/l37
发表时间:
2014-03
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
D. Casetti-Dinescu;C. M. Bidin;T. Girard;R. Mendez;K. Vieira;V. Korchagin;W. V. van Altena
通讯作者:
D. Casetti-Dinescu;C. M. Bidin;T. Girard;R. Mendez;K. Vieira;V. Korchagin;W. V. van Altena
DOI:
10.1086/116356
发表时间:
1992-11
期刊:
The Astronomical Journal
影响因子:
--
作者:
N. Suntzeff;R. Schommer;E. Olszewski;A. Walker
通讯作者:
N. Suntzeff;R. Schommer;E. Olszewski;A. Walker
DOI:
10.1111/j.1365-2966.2001.04714.x
发表时间:
2001-03
影响因子:
4.8
作者:
P. Maxted;U. Heber;T. Marsh;R. S. U. O. Southampton;Keele University;Astronomisches Institut der Universitat Erlangen-Nurnberg-Astronomisch
通讯作者:
P. Maxted;U. Heber;T. Marsh;R. S. U. O. Southampton;Keele University;Astronomisches Institut der Universitat Erlangen-Nurnberg-Astronomisch
DOI:
10.1086/107466
发表时间:
1957-05
期刊:
The Astronomical Journal
影响因子:
--
作者:
F. Kerr
通讯作者:
F. Kerr