Triggered star formation in the CO shell G 126.1-0.8-14

CICHOWOLSKI, S; ORTEGA, M. E; SUAD, L. A.; ARNAL, E. M.

Mar del Plata

Congreso; Reunión Anual de la Asociación Argentina de Astronomía; 2012

Instituto Argentino de Radioastronomía

G 126.1-­0.8­-14 is a molecular shell located in the Orion arm,at a distance of about 1 kpc. The HII region Sh2-187 is located over the border of this shell. Previous works show that Sh2-187 is a small ( 9´) and young ( 2 × 10^5 yr) ionized region that shows signs of recent star formation in its surroundings. On the other hand, based on color criteria, we have found several infrared (MSX and IRAS) sources candidates of being young stellar objects (YSO) or ultracompact HII regions (UCHII) located projected onto the shell. In this work we present an analysis of the possible origin of G 126.1­-0.8­-14 and its possible roll in the formation of new stars.