Rotational excitation of OH by H2 at interstellar temperatures (1980)
Journal Article
Flower, D. (1980). Rotational excitation of OH by H2 at interstellar temperatures. Astronomy and Astrophysics, 83, 33-37

Ultraviolet spectra of planetary nebulae. II - The young planetary nebula IC 4997 (1980)
Journal Article
Flower, D. (1980). Ultraviolet spectra of planetary nebulae. II - The young planetary nebula IC 4997. Monthly Notices of the Royal Astronomical Society, 193, 511-520. https://doi.org/10.1093/mnras/193.3.511

The absorption of He II LY alpha photons in planetary nebulae (1980)
Journal Article
Flower, D., & Perinotto, M. (1980). The absorption of He II LY alpha photons in planetary nebulae. Monthly Notices of the Royal Astronomical Society, 191, 301-308. https://doi.org/10.1093/mnras/191.2.301

A search for absorption in the fourth positive system of CO in the spectrum of the planetary nebula IC 418. (1980)
Journal Article
Clavel, J., & Flower, D. (1980). A search for absorption in the fourth positive system of CO in the spectrum of the planetary nebula IC 418. Monthly Notices of the Royal Astronomical Society, 190(1), 1P-4P. https://doi.org/10.1093/mnras/190.1.1p

The continuous emission of IC 418 has been observed at high dispersion with the IUE satellite and the spectrum searched for the A1Π−X1Σ+A1Π−X1Σ+ bands of CO. It was not possible to unequivocally detect these CO bands in IC418. However, an upper limit... Read More about A search for absorption in the fourth positive system of CO in the spectrum of the planetary nebula IC 418..