J/other/AstBu/63.278 Metal-poor stars speckle interferometry (Rastegaev+, 2008)
Speckle interferometry of metal-poor stars in the solar neighborhood. II.
Rastegaev D.A., Balega Yu.Yu., Maksimov A.F., Malogolovets E.V.,
Dyachenko V.V.
<Astrophys. Bull., 63, 278-289 (2008)>
=2008AstBu..63..278R 2008AstBu..63..278R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, nearby ; Stars, double and multiple
Abstract:
The results of speckle interferometric observations of 115 metal-poor
stars ([m/H]←1) within 250pc from the Sun and with proper motions
mu≳0.2"/yr, made with the 6-m telescope of the Special Astrophysical
Observatory of the Russian Academy of Sciences, are reported.
Close companions with separations ranging from 0.034" to 1" were
observed for 12 objects - G76-21, G59-1, G63-46, G135-16, G168-42,
G141-47, G142-44, G190-10, G28-43, G217-8, G130-7, and G89-14 -
eight of them are astrometrically resolved for the first time.
The newly resolved systems include one triple star - G190-10.
If combined with spectroscopic and visual data, our results imply
a single:binary:triple:quadruple star ratio of 147:64:9:1 for a
sample of 221 primary components of halo and thick-disk stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 108 23 Results of the speckle-interferometric
measurements for resolved objects
table2.dat 108 14 Speckle-interferometric measurements of objects
resolved by Rastegaev et al.
(2007, Cat. J/other/AstBu/62.235)
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See also:
J/A+A/325/159 : Companions to M dwarfs within 5pc (Leinert+ 1997)
J/A+A/385/87 : Speckle interferometry of nearby multiple stars (Balega+, 2002)
J/A+A/422/627 : Nearby multiple stars speckle interferometry (Balega+, 2004)
J/other/AstBu/62.235 : Metal-poor stars speckle interferometry
(Rastegaev+, 2007)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Name
15- 24 A10 --- OName Other name
30- 34 F5.3 arcsec rho ? Angular separation
40- 44 F5.3 arcsec e_rho ? rms uncertainty on rho
50- 54 F5.1 deg theta ? Position angle
60- 63 F4.1 deg e_theta ? rms uncertainty on theta
68 A1 --- l_dm Limit flag on dm
69- 72 F4.2 mag dm ? Magnitude difference between the components
78- 81 F4.2 mag e_dm ? rms uncertainty on dm
87- 93 A7 --- Filt Filter (λ/Δλ
99-108 F10.5 yr Epoch Epoch
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Acknowledgements:
Denis Rastegaev, leda82(at)gmail.com
(End) Patricia Vannier [CDS] 22-Oct-2015