SIMBAD references

2001A&A...376..586F - Astronomy and Astrophysics, volume 376, 586-598 (2001/9-3)

Spectra of binaries classified as λ Bootis stars.

FARAGGIANA R., GERBALDI M., BONIFACIO P. and FRANCOIS P.

Abstract (from CDS):

High angular resolution observations have shown that some stars classified as λ Boo are binaries with low values of angular separation and magnitude difference of the components; therefore the observed spectrum of these objects is a combination of those two components. These composite spectra have been used to define spectroscopic criteria able to detect other binaries among stars classified as λ Boo. The application of this method to HD 111786 is presented: the contribution of 5 components to the observed spectrum is demonstrated by the shape of the O I 7774Å feature. This result makes unreliable any attempt to perform an abundance analysis of this object which therefore must be definitely rejected from the class of the peculiar λ Boo stars. This approach allowed us also to recognize that the SB2 star HD 153808 is in reality a triple system.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: atmospheres - stars: chemically peculiar - stars: binaries: close - stars: binaries: spectroscopic - stars: binaries: visual

Simbad objects: 10

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2020.01.22-05:49:29

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