Artículo de revista
In-situ Star Formation in the Outskirts of the Large Magellanic Cloud: Gaia DR2 Confirmation
Fecha
2018Registro en:
Astrophysical Journal Letters, Volumen 862, Issue 1, 2018
20418213
20418205
10.3847/2041-8213/aad183
Autor
Casetti-Dinescu, Dana
Girard, Terrence
Bidin, Christian
Zhang, Lan
Mendez, Rene
Vieira, Katherine
Korchagin, Vladimir
Van Altena, William
Institución
Resumen
We explore the Gaia data release 2 (DR2) proper motions of six young, main-sequence stars, members of the Large Magellanic Cloud (LMC) reported by Moni Bidin et al. These stars are located in the outskirts of the disk, between 7° and 13° from the LMC's center where there is very low H i content. Gaia DR2 proper motions confirm that four stars formed locally, in situ, while two are consistent with being expelled via dynamical interactions from inner, more gas-rich regions of the LMC. This finding establishes that recent star formation occurred in the periphery of the LMC, where thus far only old populations were known.