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Re II and Other Exotic Spectra in HD 65949
C. R. Cowley, S. Hubrig, G. M. Wahlgren
Powerful astronomical spectra reveal an urgent need for additional work on atomic lines, levels, and oscillator strengths. The star HD 65949 provides some excellent examples of spe…
HR 710 (HD 15144): An ultra-Sr-rich, magnetic Ap star with a close companion
C. R. Cowley, S. Hubrig
The magnetic, chemically peculiar A-star HR 710 (HD 15144, ADS 1849A, AB Cet) has a close companion in a nearly circular orbit. Its 3-day period is unusually short for such stars.…
High resolution spectroscopy of HgMn stars: a time of surprises
S. Hubrig, C. R. Cowley, F. Gonzalez +1
We present the results of a high spectral resolution study of a few spectroscopic binaries with HgMn primary stars. We detect for the first time in the spectra of HgMn stars that f…
Heavy Calcium in CP Stars
C. R. Cowley, S. Hubrig, F. Castelli +2
Large wavelength shifts of infrared triplet lines of Ca II have been observed in the spectra of HgMn and magnetic Ap stars. They have been attributed to the heavy calcium isotopes,…
Inhomogeneous surface distribution of chemical elements in the eclipsing binary AR Aur: A new challenge for our understanding of HgMn stars
S. Hubrig, J. F. Gonzalez, I. Savanov +4
We present the results of a high spectral resolution study of the eclipsing binary AR Aur. AR Aur is the only known eclipsing binary with a HgMn primary star exactly on the ZAMS an…
HD 65949: The Highest Known Mercury Excess Of Any CP Star?
Charles R. Cowley, S. Hubrig, G. F. Gonzalez +1
ESO spectra of HD 65949 show it to be unlike any of the well-known types within its temperature range 13600K. It is neither a silicon, nor a mercury-manganese star, thoug…