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HR8844: A new hot Am star ?
R. Monier, M. Gebran, F. Royer
Using one archival high dispersion high quality spectrum of HR8844 (A0V) obtained with the echelle spectrograph SOPHIE at Observatoire de Haute Provence, we show that this star is…
HD 30963: a new HgMn star
R. Monier, M. Gebran, F. Royer
Using high dispersion high quality spectra of HD 30963 obtained with the echelle spectrograph SOPHIE at Observatoire de Haute Provence in November 2015, we show that this star, hit…
A study of the elements copper through uranium in Sirius A: Contributions from STIS and ground-based spectra
Charles R. Cowley, Thomas R. Ayres, Fiorella Castelli +3
We determine abundances or upper limits for all of the 55 stable elements from copper to uranium for the A1 Vm star Sirius. The purpose of the study is to assemble the most complet…
A new method for the inversion of atmospheric parameters of A/Am stars
M. Gebran, W. Farah, F. Paletou +2
We present an automated procedure that derives simultaneously the effective temperature , the surface gravity logg, the metallicity [Fe/H], and the equatorial projected ro…
The nature of the late B-type stars HD 67044 and HD 42035
R. Monier, M. Gebran, F. Royer
While monitoring a sample of apparently slowly rotating superficially normal bright late B and early A stars in the northern hemisphere, we have discovered that HD 67044 and HD 420…