Abstract
view Abstract Citations (2) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Weaker Lines in the Photographic Region of Some Late-Type Stars. van Dijke Beatty, Suzanne Abstract Several thousand lines in the photographic region of the spectra of the sun, a Bootis, 70 Ophiuchi A, p Andiomedae, and Lalande 21185 have been compared visually and photometrically on high-dispersion coud plates. A ' of the behavior of the elements in the stars is given. Absolute-magnitude effects are evident for atoms of Na I, Ca I, Sr ii, and Ba n. The increase of intensity of Cb I in the giants is considerable. The effect of high- and low-excitation potentials is evident for atoms of Mg I, Cr I, Cr U, Mn I, Fe I, Co I, and Ni I. The behavior of La II and the singly ionized rare earths can be explained as either an absolute-magnitud effect or an excess of these atoms in the atmosphere of a Bootis. La ii, then Eit ii and Nd U, show the greatest increase in the giants. Publication: The Astrophysical Journal Pub Date: January 1951 DOI: 10.1086/145380 Bibcode: 1951ApJ...113...93V full text sources ADS | data products SIMBAD (4)
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