منابع مشابه
Implications of the Spectroscopic Abundances in Alpha Centauri A & B
Regardless of their close proximity, abundance measurements for both stars in α Centauri by different groups have led to varying results. We have chosen to combine the abundance ratios from five similar datasets in order to reduce systematic effects that may have caused inconsistencies. With these collated relative abundance measurements, we find that the α Cen system and the Sun were likely fo...
متن کاملObservational Studies of Early-type Binary Stars: MP Centauri
We present photometric and spectroscopic data on the early-type binary MP Centauri. The photometric data are analyzed simultaneously with radial velocities to derive preliminary absolute dimensions for the binary components. Analysis of the spectra shows that the stars rotate synchronously and that the line of sight to the system crosses two kinematically sharp and well-separated interstellar r...
متن کاملThe Ap spectroscopic binary HD 59435 revisited ? , ? ?
HD 59435 is a double-lined spectroscopic binary, one component of which is a magnetic Ap star and the other a G8 or K0 giant (Wade et al. 1996). Both components are very slowly rotating, and the Ap star exhibits spectral lines resolved into their magneti cally-split components. Herein we report additional measurements of the mean magnetic field modulus of the Ap star, measurements of the radial...
متن کاملOn the Λ Bootis Spectroscopic Binary Hypothesis
Is the proposed spectroscopic binary model able to explain the observed abundance pattern and photometric metallicity indices for the group members? What is the percentage of undetected spectroscopic binary systems? We have used the newest available stellar atmospheres to synthesize 105 hypothetical binary systems in the relevant astrophysical parameter range. These models were used to derive p...
متن کاملSpectroscopic observations of the interacting binary BYCrucis
We present multi-wavelength spectroscopic data of the 106 day period interacting binary BY Crucis (Daems et al. 1997). The system consist of an early F-type supergiant that fills its Roche lobe and a more massive companion, hidden in a thick accretion disc. In the far-UV spectra (from 1200 Å to 1950 Å), strong emission lines of highly ionised elements are observed, superposed on a continuum. Bo...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 1917
ISSN: 0004-6280,1538-3873
DOI: 10.1086/122588