Near-Infrared Spectroscopy of H2 in Proto-Planetary Nebulae

Douglas M. Kelly, Bruce J. Hrivnak
2003 Symposium - International astronomical union  
We measured 2.1 – 2.3 μm spectra for a fairly complete sample of known proto-planetary nebulae (PPN) at declinations greater than -30°. This spectral range includes the H2emission lines 1-0 S(1), 1-0 S(0), 2-1 S(1), 2-1 S(2), and 3-2 S(3). We detected H2emission from 16 of the 51 nebulae in our survey, including radiatively-excited H2from several non-bipolar PPN.
doi:10.1017/s007418090020870x fatcat:pbqhr4zoerb4bkmhao4rjuanoy