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J/other/AstBu/62.235  Metal-poor stars speckle interferometry (Rastegaev+, 2007)
Speckle interferometry of metal-poor stars in the solar neighborhood. I.
    Rastegaev D.A., Balega Yu.Yu., Malogolovets E.V
   <Astrophys.  Bull., 62, 235-243 (2007)>
   =2007AstBu..62..235R
ADC_Keywords: Stars, nearby ; Stars, double and multiple


Abstract:
    We report the results of speckle-interferometric observations of 109
    high proper-motion metal-poor stars made with the 6-m telescope of the
    Special Astrophysical Observatory of the Russian Academy of Sciences.
    We resolve eight objects G102-20, G191-55, BD+19 1185A, G89-14,
    G87-45, G87-47, G111-38, and G114-25 into individual components and 
    we are the first to astrometrically resolve seven of these stars. 
    New resolved systems included two triple (G111-38, G87-47) and one
    quadruple (G89-14) star. The ratio of single:binary:triple:quadruple
    systems among the stars of our sample is equal to 71:28:6:1.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table3.dat        58       43   WDS components for stars of the sample
table4.dat        39      101   Unresolved stars


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)


Byte-by-byte Description of file: table3.dat

   Bytes Format Units   Label   Explanations

   1- 15  A15   ---     Name    Name
  17- 26  A10   ---     WDS     WDS Name (HHMMm+DDMM, CCDM HHMMm+DDMM in Simbad)
  28- 38  A11   ---     Comp    Other binary designation
  40- 44  F5.1  arcsec  rho     ? Angular separation
  46- 49  F4.2  mag     Dm      ? Magnitude difference between the components
  51- 52  A2    ---     St      [±? ] Physical binary status (1)
  54- 58  A5    ---     Refs    References (2)

Note (1): Status as follows:
      + = possibly physically bound to the to the main star
      - = possibly unbound optical pairs
      ? = decision not sure
Note (2): References as follows:
      8 = Aleen et al., 2000, Cat. J/A+A/356/529
      9 = Zapatero Osorio & Martin, 2004, Cat. J/A+A/419/167
     15 = Hipparcos catalog, Cat. I/239
      * = observations confirm the presence of the given component


Byte-by-byte Description of file: table4.dat

   Bytes Format Units  Label   Explanations

   1- 10  A10   ---    Name    Name
  15- 17  I3    nm     Filt    Filter central wavelength (545, 550 or 800)
      18  A1    ---    ---     [/]
  19- 21  I3    nm     DFilt   Filter width
      22  A1    ---    ---     [;]
  23- 25  I3    nm     Filt2   ? Second filter central wavelength (800)
      26  A1    ---    ---     [/]
  27- 29  I3    nm     DFilt2  ? Second filter width
  31- 39  F9.4  yr     Epoch   Epoch of observation


History:
    From electronic version of the journal
(End)                                        Patricia Vannier CDS    07-Jul-2008