TY - JOUR
T1 - Recombination line profiles of embedded clusters
AU - Beck, S. C.
PY - 2008/10
Y1 - 2008/10
N2 - We are trying to probe conditions in the youngest super star clusters, those still embedded in dense obscuring clouds. The hydrogen recombination lines in the radio and infrared can be observed through the obscuration, as the optical and UV lines cannot, and give us the kinematics of the ionized gas. The line profiles of the clusters resemble superpositions of the lines of many very young ultra-compact or hyper-compact HII regions. This can be explained if each OB star is individually embedded in dense material which it is accreting, even as it ionizes. We speculate on what this implies for conditions in the clusters.
AB - We are trying to probe conditions in the youngest super star clusters, those still embedded in dense obscuring clouds. The hydrogen recombination lines in the radio and infrared can be observed through the obscuration, as the optical and UV lines cannot, and give us the kinematics of the ionized gas. The line profiles of the clusters resemble superpositions of the lines of many very young ultra-compact or hyper-compact HII regions. This can be explained if each OB star is individually embedded in dense material which it is accreting, even as it ionizes. We speculate on what this implies for conditions in the clusters.
KW - Galaxies: star clusters
KW - Infrared: general
KW - Line: profiles
UR - http://www.scopus.com/inward/record.url?scp=52949122192&partnerID=8YFLogxK
U2 - 10.1051/0004-6361:200810441
DO - 10.1051/0004-6361:200810441
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:52949122192
SN - 0004-6361
VL - 489
SP - 567
EP - 569
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
IS - 2
ER -