Observations of /H92? radio recombination line (RRL) and continuum emission were made towards three Celnik positions of the Rosette Nebula. The electron temperature Te(LTE) was derived for each position giving an average value of 7980/+/-580 K. A non-LTE modelling was made which could describe the dependence of line contrast (TL/TC), Te(LTE) and line width on quantum number (/n). The modelling together with a review of available data show that the Rosette Nebula should contain clumps with densities up to ~103 cm-3. The unexpected VLSR measured at one of the three positions could be interpreted as a possible jet, or some dense compact part (clump) of the HII region, moving toward the observer.
Rosette Nebula: RRL observations of 92 alpha transition and the modeling
2002
Abstract
Observations of /H92? radio recombination line (RRL) and continuum emission were made towards three Celnik positions of the Rosette Nebula. The electron temperature Te(LTE) was derived for each position giving an average value of 7980/+/-580 K. A non-LTE modelling was made which could describe the dependence of line contrast (TL/TC), Te(LTE) and line width on quantum number (/n). The modelling together with a review of available data show that the Rosette Nebula should contain clumps with densities up to ~103 cm-3. The unexpected VLSR measured at one of the three positions could be interpreted as a possible jet, or some dense compact part (clump) of the HII region, moving toward the observer.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
