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Molecules, dust and ionized gas in high mass star forming regions on various scales
Igor Zinchenko IAP RAS, Nizhny Novgorod, RU | |
| We performed investigations of two areas of high mass star formation associated with H II regions (S255 and S76) on various scales from ~ 10 pc to ~ 0.01 pc in a wide wavelength range from ~ 50 cm to IR. The data provide information on various components — molecular gas, dust and ionized gas. Physical parameters are evaluated from the analysis and modeling of continuum and molecular line emission. The main findings are the following. New protostellar clumps and very young (perhaps the youngest known) outflows are detected. The cores are inhomogeneous on all observed scales including the smallest ones (the beam filling factor is 0.2 for the 0.4 arcsec beam - corresponding to 1000 AU). Significant molecular chemical differentiation is observed on various scales. A rather large abundance of a deuterated molecule (DCN) is found unexpectedly towards the hot core in S255IR (T = 170 K). The outflowing gas in S255IR is hot and very dense. A new picture of the disk-outflow system in S255IR is proposed. The large scale data hint at the sequential induced star formation. | |
| Collaborators: S.-Y. Liu, ASIAA, Taiwan Y.-N. Su, ASIAA, Taiwan S. Kurtz, CRyA UNAM, Mexico D.K. Ojha, TIFR, India S.K. Ghosh, TIFR, India M.R. Samal, LAM, France R.-Q. Mao, PMO, China S.V. Salii, UrFU, Russia A.M. Sobolev, UrFU, Russia P.M. Zemlyanukha, IAP RAS, Russia |
Key publication
Suggested Sessions: Massive Star Formation and Feedback |