Discovery of a Large Population of Nitrogen-Enhanced Stars in the Magellanic Clouds
Draft version October 2, 2020 Typeset using LATEX twocolumn style in AASTeX62 Discovery of a large population of Nitrogen-Enhanced stars in the Magellanic Clouds Jose´ G. Fernandez-Trincado´ ,1 Timothy C. Beers,2 Dante Minniti,3, 4 Leticia Carigi,5 Beatriz Barbuy,6 Vinicius M. Placco,2, 7 Christian Moni Bidin,8 Sandro Villanova,9 Alexandre Roman-Lopes,10 and Christian Nitschelm11 1Instituto de Astronom´ıay Ciencias Planetarias, Universidad de Atacama, Copayapu 485, Copiap´o,Chile 2Department of Physics and JINA Center for the Evolution of the Elements, University of Notre Dame, Notre Dame, IN 46556, USA 3Depto. de Cs. F´ısicas, Facultad de Ciencias Exactas, Universidad Andr´esBello, Av. Fern´andezConcha 700, Las Condes, Santiago, Chile 4Vatican Observatory, V00120 Vatican City State, Italy 5Instituto de Astronom´ıa, Universidad Nacional Aut´onomade M´exico, A.P. 70-264, 04510, Ciudad de M´exico, Mexico 6Universidade de S~aoPaulo, IAG, Rua do Mat~ao1226, Cidade Universit´aria,S~aoPaulo 05508-900, Brazil 7NSF's Optical-Infrared Astronomy Research Laboratory, Tucson, AZ 85719, USA 8Instituto de Astronom´ıa,Universidad Cat´olica del Norte, Av. Angamos 0610, Antofagasta, Chile 9Departamento de Astronom´ıa,Casilla 160-C, Universidad de Concepci´on,Concepci´on,Chile 10Departamento de Astronom´ıa,Universidad de La Serena - Av. Juan Cisternas, 1200 North, La Serena, Chile 11Centro de Astronom´ıa(CITEVA), Universidad de Antofagasta, Avenida Angamos 601, Antofagasta 1270300, Chile ABSTRACT We report the APOGEE-2S+ discovery of a unique collection of nitrogen-enhanced mildly metal- poor giant stars, peaking at [Fe/H]∼ −0:89 with no carbon enrichment, toward the Small and Large Magellanic Clouds (MCs), with abundances of light- (C, N), odd-Z (Al, K) and α−elements (O, Mg, Si) that are typically found in Galactic globular clusters (GCs).
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