Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..280p.113c&link_type=abstract
The Molecular Universe, Posters from the proceedings of the 280th Symposium of the International Astronomical Union held in Tole
Astronomy and Astrophysics
Astronomy
Scientific paper
The dense shells surrounding stellar wind bubbles are potential sites for the formation of new stars. With the aim of investigating stellar formation activity in the molecular layers around the ring nebulae RCW 52 and RCW 78, we carried out observations of the continuum emission at 870 μm and 13CO(2-1) line observations. The observational data were obtained with the Atacama Pathfinder Experiment (APEX), located in the north of Chile, in a region of 12x12 arcmin in size towards RCW 52 and of 8x8 arcmin in size towards RCW 78, using LABOCA bolometer array and APEX-1 SHFI instrument. The 13CO(2-1) line observations obtained towards these ring nebulae revealed the dense and cold molecular clumps in which the protostars candidates are enshrouded and allowed to analyze the kinematics of the clumps as well as to estimate their masses and densities. The optically thin continuum emission at 870 μm allowed to find the cold dust emission regions where the deeply embedded star forming sources are immersed. Kinematical information confirm the association of the YSOs to the dense molecular layer surrounding the stellar wind bubbles. Finally, we compare the stellar formation activity in these ring nebulae with previous studies of stellar wind bubbles and HII regions.
Cappa Cristina
Martin Martin C.
Romero Gisela A.
Rubio M'onica
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