Asteroseismology of chemically peculiar stars
نویسندگان
چکیده
منابع مشابه
Multiplicity of chemically peculiar stars
Recently, with the goal to study multiplicity of chemically peculiar stars, we carried out a survey of 40 stars using diffraction limited near infrared (IR) imaging with NAOS-CONICA (NACO) at the VLT. Here, we announce the detection of 27 near IR companion candidates around 25 late B-type chemically peculiar stars exhibiting strong overabundances of the chemical elements Hg and Mn in their atmo...
متن کاملHelium in Chemically Peculiar Stars
For the purpose of deriving the helium abundances in chemically peculiar stars, the importance of assuming a correct helium abundance has been investigated for determining the effective temperature and gravity of main sequence B-type stars, making full use of the present capability of reproducing their helium lines. Even if the flux distribution of main sequence B-type stars appears to depend o...
متن کاملMultiplicity among chemically peculiar stars II . Cool magnetic Ap stars ⋆
We present new orbits for sixteen Ap spectroscopic binaries, four of which might in fact be Am stars, and give their orbital elements. Rough estimates of the individual masses of the components of HD 65339 (53 Cam) are given, combining our radial velocities with the results of speckle interferometry and with Hipparcos parallaxes. Considering the mass functions of 74 spectroscopic binaries from ...
متن کاملA spectroscopic study of some suspected chemically peculiar stars
Time-resolved spectra in the 410 700 nm range have been obtained to investigate 10 stars which are classified as suspected chemically peculiar stars in The General Catalogue of Ap and Am stars by Renson et al. (1991) or in the latest literature. Among the studied stars, HD20629 presents metal abundances which are significantly different from main sequence star values and it should be classified...
متن کاملChemically peculiar stars in the field of NGC 2244 ?
Low-resolution long-slit spectra of reference stars, including MKK standard stars and well-known chemically peculiar stars, are used to develop a spectroscopic method for the detection of the 5200 Å flux depression in CP stars. This new method is shown to be as sensitive a detection tool as the photometrical techniques, and provides a higher resolution view of the excess blocking. Application t...
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ژورنال
عنوان ژورنال: Communications in Asteroseismology
سال: 2009
ISSN: 1021-2043,1021-2043
DOI: 10.1553/cia159s61