2001A&A...376..586F


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.12CET08:01:46

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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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * tet01 Eri * 02 58 15.715 -40 18 17.03   3.33 3.18     A3IV-V 53 0
2 * tet02 Eri PM* 02 58 16.4053309356 -40 18 16.900014010   4.20 4.11     A1V 31 0
3 * 131 Tau ** 05 47 13.1536316 +14 29 17.967416   5.785 5.721     A3Vn 97 0
4 * 53 Aur ** 06 38 23.0100918845 +28 59 03.622016069   5.761 5.744     B9Mn+F0m 126 0
5 HD 53191 * 07 00 16.7303392124 -60 51 45.829537207   7.65 7.90     A0V 21 0
6 HD 84123 PM* 09 44 06.8765461366 +42 03 03.131298842   7.135 6.838     A4III 49 0
7 HD 84948 SB* 09 50 05.8774942991 +49 04 31.750979246   8.42 8.12     F0 48 0
8 V* MO Hya dS* 12 51 57.8969100913 -26 44 17.797063067   6.358 6.141     F0VkA1mA1_lB 111 0
9 * lam Boo dS* 14 16 23.0187965 +46 05 17.900526 4.31 4.26 4.18 4.16 4.13 A0Va_lB 325 0
10 * eps Her SB* 17 00 17.3737789 +30 55 35.056489 3.80 3.91 3.92 3.93 3.97 A0V 156 0

    Equat.    Gal    SGal    Ecl

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2019.12.12-08:01:46

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