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The observation and analysis of stellar photospheres
1. Background 2. Fourier transforms 3. Spectroscopic tools 4. Light detectors 5. Radiation terms and definitions 6. The black body and its radiation 7. Radiative and convective energy transport 8.Expand
Rotation and Macroturbulence in Metal-Poor Field Red Giant and Red Horizontal Branch Stars
We report the results for rotational velocities, Vrot sin i, and macroturbulence dispersions, ζRT, for 12 metal-poor field red giant branch (RGB) stars and 7 metal-poor field red horizontal branchExpand
The Star Patch on the G8 Dwarf chi Bootis A
Les observations spectroscopiques de cette naine rouge montrent que des variations dans l'asymetrie des raies spectrales et dans les largeurs equivalentes apparaissent periodiquement tous les 6.43Expand
The rotational break for G giants
New high-resolution spectroscopic observations have been obtained for 73 G giants. Fourier analysis of their spectral lines yields rotation velocities and macroturbulence dispersions. Combined withExpand
The Rotation of Arcturus and Active Longitudes on Giant Stars
From two decades of high-resolution spectroscopic measurements of Arcturus (HR 5340, K2 III), we identify a 2 yr modulation in the velocity span of the bisector of the Fe i λ6252.57 line. It seemsExpand
High‐resolution spectroscopic study of red clump stars in the Galaxy: iron‐group elements
The main atmospheric parameters and abundances of the iron-group elements (vanadium, chromium, iron, cobalt and nickel) are determined for 62 red giant ‘clump’ stars revealed in the Galactic field byExpand
SPECTRAL LINE-DEPTH RATIOS AS TEMPERATURE INDICATORS FOR COOL STARS
The use of spectral line-depth ratios as a stellar thermometer in G and K dwarfs is developed and refined beyond an earlier study (Gray and Johnson 1991). Ratios incorporating a line with any degreeExpand
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