J/A+A/385/87 Speckle interferometry of nearby multiple stars (Balega+, 2002)
Speckle interferometry of nearby multiple stars.
Balega I.I., Balega Y.Y., Hofmann K.-H., Maksimov A.F., Pluzhnik E.A.,
Schertl D., Shkhagosheva Z.U., Weigelt G.
<Astron. Astrophys. 385, 87 (2002)>
=2002A&A...385...87B 2002A&A...385...87B
ADC_Keywords: Stars, double and multiple
Keywords: stars: binaries: visual - stars: fundamental parameters -
techniques: interferometric
Abstract:
We present the results of diffraction-limited optical speckle
interferometry and infrared bispectrum speckle interferometry of 111
double and 10 triple systems performed in 1998-1999 with the 6-m
telescope of the Special Astrophysical Observatory in Zelenchuk. The
observations concentrated on nearby close binaries discovered during
the Hipparcos mission. Many nearby fast-orbiting low-mass binaries
known before Hipparcos were also included in the program. New
companions were first resolved in 4 systems: HIP 5245, ADS 3179,
Kui99, and ADS 16138. In addition to accurate relative positions,
magnitude differences were measured for most of the pairs. We combined
our results with the Hipparcos parallaxes to derive absolute
magnitudes and spectral types for 63 binaries and 4 triples.
Preliminary orbital elements and the mass-sum are derived for HIP 689,
and improved orbits are presented for HIP 16602 (CHR117) and HIP 21280
(CHR17).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 90 162 Binary star measurements
table1.tex 112 249 LaTeX version of table 1
table2.dat 90 23 Triple star measurements
table2.tex 116 58 LaTeX version of table 2
notes.dat 80 121 Individual notes
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See also:
J/AJ/117/1905 : Speckle interferometry at USNO. II. (Germain+, 1999)
J/AJ/117/2511 : Speckle interferometry at USNO. III (Germain+, 1999)
J/AJ/118/1395 : Speckle interferometry at USNO. IV. (Douglass+, 1999)
J/AJ/119/3071 : Speckle interferometry at USNO. V. (Douglass+, 2000)
J/AJ/120/1120 : Speckle interferometry at USNO. VI. (Mason+, 2000)
J/AJ/122/1586 : Speckle interferometry at USNO. VII. (Mason+, 2001)
J/AJ/117/1890 : Speckle interferometry of HIP binaries I. (Mason+, 1999)
J/AJ/121/3224 : Speckle interferometry of HIP binaries II. (Mason+, 2001)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP HIP number
7 A1 --- n_HIP [*] *: indicates a note in notes.dat file
8- 19 A12 --- Name Name
22- 29 A8 --- Disc Discoverer name
31- 34 A4 --- Comp Component
36- 45 A10 --- WDS WDS name, based in J2000 position
48- 56 F9.4 yr Epoch Epoch of observation in fractional Besselian
year
58- 62 F5.1 deg theta ? Position angle for the secondary relative
to the primary
63 A1 --- n_theta [*] Note on theta (1)
64- 65 A2 --- --- [UR] UR: unresolved star
66- 70 F5.2 deg e_theta ? rms uncertainty on theta
71- 74 I4 mas rho ? Angular distance
76 I1 mas e_rho ? rms uncertainty on rho
78- 81 F4.2 mag Dm ? Magnitude difference in the "Filter" band
82 A1 --- n_Dm [*] Note on Deltam (1)
84- 87 F4.2 mag e_Dm ? rms uncertainty on Deltam
89- 90 A2 --- Filter [RVGK' ] Filter
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Note (1): The formal errors of relative position measurements, obtained
from least-squares fitting, are 0.3-0.5° and 1-2mas for theta and
rho measurements, respectively. For well-studied binaries, observed as
standard stars for speckle interferometry, the root mean square
deviation of residuals of our measures to the ephemeris was found to
be 0.5° in position angle and 2.5mas in separation. For 27 binary
systems the 180° position angle ambiguity was not resolved. These
cases are marked with an asterisk.
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP HIP number
8- 80 A73 --- Note text of the note
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Acknowledgements: Yuri Balega
(End) Patricia Bauer [CDS] 30-May-2002