27 citations · 32 across the 3 of their papers we have counts for
3 papers
Spectral variability of the binary HR 4049
Eric J. Bakker, David L. Lambert, Hans van Winckel +3
The H profile varies with the orbital period. The two strong shell type emission peaks are identified as from one single broad emission feature with an absorption centered aroun…
Circumstellar C2, CN, and CH+ in the optical spectra of post-AGB stars
Eric J. Bakker, Ewine F. van Dishoeck, L. B. F. M. Waters +1
We present optical high-resolution spectra of a sample of sixteen post-AGB stars and IRC +10216. Of the post-AGB stars, ten show C2 Phillips and Swan and CN Red System absorption,…
A study on the nature of the peculiar supergiant HD101584
Eric J. Bakker, Henny J. G. L. M. Lamers, L. B. F. M. Waters +3
We present a study of low- and high-resolution ultraviolet, high-resolution optical CAT/CES spectra and ultraviolet, optical and infrared photometry of the peculiar supergiant HD10…