Vertical Chromium Distribution in the Atmosphere of a Chemically Peculiar Star. I. Diagnostics |
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| Authors: | I S Savanov O P Kochukhov V V Tsymbal |
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| Institution: | (1) Crimean Astrophysical Observatory, Ukraine;(2) Crimean Astrophysical Observatory, Ukraine;(3) Simferopol' State University, Ukraine |
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| Abstract: | On the basis of CCD spectrograms obtained with high resolution at the Coudé focus of the 2.6-m telescope of the Crimean Astrophysical Observatory, Cr II lines lying in the wings of the H hydrogen line are investigated. Vertical chromium stratification in the atmospheres of two normal and eight chemically peculiar stars is diagnosed using the method of spectral synthesis. An increase in Cr abundance with depth is found for the cool Ap stars CrB, HR 7575,  Equ, and 10 Aql. Some increase in Cr abundance in the upper layers of the atmosphere is presumed for all Am stars and for both Hg—Mn components of 46 Dra. The vertical chromium distribution in the atmospheres of the hot, spotted Ap stars 17 Com and  2 CVn is evidently uniform. |
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