Evidence of triggered star formation in G327.3-0.6. Dust-continuum mapping of an infrared dark cloud with P-ArTéMiS
Artikel i vetenskaplig tidskrift, 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.

Författare

V. Minier

CEA Saclay

P. André

CEA Saclay

Per Bergman

Chalmers, Institutionen för radio- och rymdvetenskap, Nationella anläggningen för radioastronomi

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, Institutionen för radio- och rymdvetenskap, Nationella anläggningen för radioastronomi

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 501 1-4

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.1051/0004-6361/200912308