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机译:The Ara OB1a association: Stellar population and star formation history
Facultad de Ciencias Astronómicas y Geofísicas (UNLP), Instituto de Astrofísica de la Plata, CONICET, Paseo del Bosque s/n, La Plata, Argentina;
ESO, Alonso de Cordova 3107, Vitacura, Santiago de Chile, Chile;
ESO, Karl-Schwarzschild-Strasse 2, 85748 Garching bei Munchen, Germany;
open clusters and associations: general; open clusters and associations: individual: NGC 6167; open clusters and associations: individual: NGC 6193; Stars: formation; stars: pre-main sequence;