The prevalence of neutral gas in massive post-main-sequence nebulae
Results are reported from a CO (J = 2-1) survey of nine type I nebulae using the 12-m NRAO antenna at KPNO; the data are presented in tables, graphs, and contour maps and briefly characterized. Three of the nebulae are found to have significant CO emission, with evidence of (1) dissociated molecular envelopes, (2) complete ionization of the gas by
Phillips, J. P. et al.
Fecha de publicación:
1989