CAOSP abstracts, Volume: 27, No.: 3, year: 1998
- Author(s): ILIEV, I.KH.; BARZOVA, S.I.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 27, no. 3, p. 441-445.
- Date: 04/1998
- Title: Shell signs in the hydrogen-line spectrum of some lambda Bootis-type stars
- Keyword(s): STARS: LAMBDA BOOTIS, STARS: CHEMICALLY PECULIAR
- Pages: 441 -- 445
The hydrogen-line spectrum of eight lambda Bootis type stars is
studied. The observed H delta and H gamma profiles are compared with Kurucz's
theoretical profiles. The existence of weak emission-like details in the
cores of five lambda Boo stars is demonstrated. The Inglis-Teller formula
is used to calculate the electron densities. It is found that electron
densities in the atmospheres of stars with peculiar H-line profiles are twice
lower than in stars with normal profiles. The conclusion is made that stars
with peculiar profiles exhibit some of the characteristics usually observed
in stars with extended atmospheres.
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