In-situ Star Formation in the Outskirts of the Large Magellanic Cloud: Gaia DR2 Confirmation.

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 7degree and 13degree 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.

1 citations (Crossref) [2023-10-31] Place: United States Casetti-Dinescu, Dana I. Physics Department, Southern Connecticut State University, 501 Crescent Street, New Haven, CT 06515, USA; dana.casetti@gmail.com. Casetti-Dinescu, Dana I. Astronomical Institute of the Romanian Academy, str. Cutitul de Argint 5, Bucharest, Romania. Casetti-Dinescu, Dana I. Radiology and Biomedical Imaging, Yale School of Medicine, 300 Cedar Street, New Haven, 06519, USA. Girard, Terrence M. Dunn Road, Hamden, CT 06518, USA. Bidin, Christian Moni. Instituto de Astronomia, Universidad Catolica del Norte, Av. Angomos 0610, Antofagasta, Chile. Zhang, Lan. Key Lab of Optical Astronomy, National Astronomical Observatories, CAS, 20A Datun Road, Chaoyang District, 100012 Beijing, People's Republic of China. Mendez, Rene A. Departamento de Astronomia Universidad de Chile, Camino El observatorio #1515, Las Condes, Santiago, Chile. Vieira, Katherine. Centro de Investigaciones de Astronomia, Apartado Postal 264, Merida 5101-A, Venezuela. Korchagin, Vladimir I. Institute of Physics, Southern Federal University, Stachki st. 194, 344090, Rostov-on-Don, Russia. van Altena, William F. Astronomy Department, Yale University, 46 Hillhouse Avenue, New Haven, CT 06511, USA.