Evidence of triggered star formation in G327.3-0.6. Dust-continuum mapping of an infrared dark cloud with P-ArTéMiS
Journal article, 2009
Aims. Expanding HII regions and propagating shocks are common in the environment of young high-mass star-forming complexes. They can compress a pre-existing molecular cloud and trigger the formation of dense cores. We investigate whether these phenomena can explain the formation of high-mass protostars within an infrared dark cloud located at the position of G327.3-0.6 in the Galactic plane, in between two large infrared bubbles and two HII regions. Methods. The region of G327.3-0.6 was imaged at 450 μm with the CEA P-ArTéMiS bolometer array on the Atacama Pathfinder EXperiment telescope in Chile. APEX/LABOCA and APEX-2A, and Spitzer/IRAC and MIPS archives data were used in this study. Results. Ten massive cores were detected in the P-ArTéMiS image, embedded within the infrared dark cloud seen in absorption at both 8 and 24 μm. Their luminosities and masses indicate that they form high-mass stars. The kinematical study of the region suggests that the infrared bubbles expand toward the infrared dark cloud.Conclusions. Under the influence of expanding bubbles, star formation occurs in the infrared dark areas at the border of HII regions and infrared bubbles. © 2009 ESO.
Author
V. Minier
CEA Saclay
P. André
CEA Saclay
Per Bergman
Chalmers, Department of Radio and Space Science, National Facility for Radio Astronomy
F. Motte
CEA Saclay
F. Wyrowski
Max Planck Institut fur Radioastronomie
J. Le Pennec
CEA Saclay
L. Rodriguez
CEA Saclay
O. Boulade
CEA Saclay
E. Doumayrou
CEA Saclay
D. Dubreuil
CEA Saclay
P. Gallais
CEA Saclay
G. Hamon
CEA Saclay
P. O. Lagage
CEA Saclay
M. Lortholary
CEA Saclay
J. Martignac
CEA Saclay
V. Revéret
European Southern Observatory Santiago
CEA Saclay
H. Roussel
Universite Pierre et Marie Curie
M. Talvard
CEA Saclay
G. Willmann
CEA Saclay
Hans Olofsson
Chalmers, Department of Radio and Space Science, National Facility for Radio Astronomy
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 501 1 1-4Subject Categories (SSIF 2011)
Astronomy, Astrophysics and Cosmology
DOI
10.1051/0004-6361/200912308