Carbon monoxide observations of AraOB1 molecular complex

G.A. ROMERO, E.M. ARNAL

Isla Margarita, Venezuela

Congreso; XII Reunión Regional Latinoamericana de la UAI; 2007

Unión Astronómica internacional

 We present a study of the molecular gas towards two particular regions of AraOB1 which are related to stellar formation activity. They are the bright Rim Nebula (NGC6188) and the dark cloud Sandqvist182. Both regions signal the presence of a ``Photo Dominated Region'' (PDR) between the HII region and nearby dark clouds. For the case of NGC6188 the PDR is seen projected onto the plane of sky almost edge on, clearly showing the interface between the ionized medium (RCW108) and the molecular complex.Based on 12CO (HPBW= 2'.7) and 13CO (HPBW= 2'.6) (J=1--->0) lines observations carried out with the NANTEN telescope, the molecular gas distribution is analyzed.Along NGC6188 several well defined molecular clumps are found and it is revealed a clear velocity gradient of --0.25 km s-1 pc-1 along the north-south direction.