5 papers
Chemical evolution in the environment of intermediate mass young stellar objects: NGC7129--FIRS2 and LkH234
A. Fuente, J. R. Rizzo, P. Caselli +2
We have carried out a molecular survey of the Class 0 IM protostar NGC 7129 -- FIRS 2 (hereafter FIRS 2) and the Herbig Be star LkH 234 with the aim of studying the chemical evo…
The origin of the HH7-11 outflow
R. Bachiller, F. Gueth, S. Guilloteau +2
New, high-sensitivity interferometric CO J=2-1 observations of the HH 7-11 outflow show that despite previous doubts, this system is powered by the Class I source SVS 13. The molec…
L483: A Protostar In Transition From Class 0 to Class I
M. Tafalla, P. C. Myers, D. Mardones +1
We present molecular-line observations toward the dense core in L483 and its bipolar outflow powered by the Class 0 object IRAS 18148-0440. CO (carbon monoxide) maps show that the…
Measurements of 12C/13C ratio in planetary nebulae: implications on stellar and Galactic chemical evolution
F. Palla, R. Bachiller, L. Stanghellini +2
We present the results of a study aimed at determining the 12C/13C ratio in two samples of planetary nebulae (PNe) by means of millimeter wave observations of 12CO and 13CO. The fi…
Molecular Outflows from Young Stellar Objects
John Richer, Debra Shepherd, Sylvie Cabrit +2
We review some aspects of the bipolar molecular outflow phenomenon. In particular, we compare the morphological properties, energetics and velocity structures of outflows from high…