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1999ApJ...526..991A - Astrophys. J., 526, 991-1000 (1999/December-1)
Spectroscopic observations of convective patterns in the atmospheres of metal-poor stars.
ALLENDE PRIETO C., GARCIA LOPEZ R.J., LAMBERT D.L. and GUSTAFSSON B.
Abstract (from CDS):
The mean line bisector of the photospheric atomic lines is compared with those measured for the strong Mg I b1 and b2 features. The upper parts of the bisectors are similar, and–assuming they overlap–the bottom ends of the stronger lines, which are formed higher in the atmosphere, go much farther to the red. This is in agreement with the expected decreasing of the convective blueshifts in upper atmospheric layers, and is compatible with the high-velocity redshifts observed in the chromosphere, transition region, and corona in late-type stars.
Abstract Copyright: ∼
Journal keyword(s): Convection - Line: Profiles - Stars: Atmospheres - Stars: Late-Type - Stars: Population II - Sun: Photosphere
Simbad objects: 3
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