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astro-ph1996
Variability and nature of the binary in the Red Rectangle Nebula
C. Waelkens, H. Van Winckel, L. B. F. M. Waters +1
We present new observations of the central binary inside the Red Rectangle nebula. The detection of zinc in the optical spectrum confirms that the peculiar photospheric abundances…
astro-ph1996
Lines of Circumstellar C2, CN, and CH+ in the Optical Spectra of Post-Agb Stars
Eric J. Bakker, David L. Lambert, Ewine F. van Dishoeck
Recent optical spectra of post-AGB stars show the presence of C2, CN, and CH+ originating in the circumstellar shell. We present here new, higher resolution spectra which provide c…