J/AJ/154/273 New orbits for 18 binaries (Cvetkovic+, 2017)
New orbits for 18 binaries.
Cvetkovic Z., Pavlovic R.
<Astron. J., 154, 273 (2017)>
=2017AJ....154..273C 2017AJ....154..273C (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Binaries, orbits
Keywords: binaries: general - binaries: visual - stars: fundamental parameters
Abstract:
Orbital elements of 18 visual binaries are computed using the measurements
collected in the Fourth Catalog of Interferometric Measurements of
Binary Stars; 15 orbits are determined for the first time and three
orbits are revised. Eleven of the binaries, denoted as HDS, were
discovered during the Hipparcos mission. The remaining binaries were
discovered a few years earlier or later than 1991. All studied pairs
are close, and all measured separations are less than 0.46". The shortest
orbital period is 10 years and the longest orbital period is 127 years.
Dynamical parallaxes and total masses of systems are derived from the
orbital elements. We also give absolute magnitudes, spectral types,
and (O-C) residuals in θ and ρ.
Description:
In our earlier papers (Cvetkovic et al. 2014AJ....147...62C 2014AJ....147...62C,
2016AJ....151...83C 2016AJ....151...83C), new orbital elements for 16 HDS stars were
presented. In this paper, 11 out of the 18 considered binaries are
also HDS. In addition to Hipparcos measurement, later measurements of
these binaries were performed by using the speckle interferometric
technique. They are available in the Fourth Catalog of Interferometric
Measurements of Binary Stars (INT4;
http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/int4).
The orbital elements for 15 binaries are determined for the first
time. For three binaries, HDS 23Da,Db, HDS 93, and CHR 187, the orbits
were previously determined, but the additional measurements yield
significant residuals, so we recalculated them and now present them in
this paper. The orbital elements are calculated by applying the
Koval'skij-Olevic method (Olevic & Cvetkovic 2004A&A...415..259O 2004A&A...415..259O), and
observations are assigned the corresponding weights according to the
proposal given in Hartkopf et al. (1989AJ.....98.1014H 1989AJ.....98.1014H,
2001AJ....122.3472H 2001AJ....122.3472H).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 60 18 Stars positions (from Simbad)
table3.dat 111 164 Observational data and residuals
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See also:
III/135 : Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989)
V/39 : 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
J/AJ/111/370 : Orbits of 37 close visual systems (Hartkopf+ 1996)
J/A+A/341/121 : Visual binary orbits and masses (Soederhjelm 1999)
J/AJ/123/1023 : Binary star orbits (Seymour+, 2002)
J/A+A/546/A69 : Orbits of visual binaries and dynamical masses (Malkov+, 2012)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Binary identifier
15- 20 I6 --- HD [126/352860]? HD number
22- 23 I2 h RAh ? Simbad Hour of Right Ascension (J2000)
25- 26 I2 min RAm ? Simbad Minute of Right Ascension (J2000)
28- 40 F13.10 s RAs ? Simbad Second of Right Ascension (J2000)
42 A1 --- DE- ? Simbad Sign of the Declination (J2000)
43- 44 I2 deg DEd ? Simbad Degree of Declination (J2000)
46- 47 I2 arcmin DEm ? Simbad Arcminute of Declination (J2000)
49- 60 F12.9 arcsec DEs ? Simbad Arcsecond of Declination (J2000)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Binary identifier
15- 23 F9.4 yr Epoch [1982.12/2015.9127] Epoch of the observation
25- 26 A2 --- Note Observation note (1)
28- 33 F6.2 deg theta [0.5/356.5] Position angle θ
35- 40 F6.4 arcsec rho [0.0224/0.462] Separation ρ
42- 65 A24 --- Ref Observation reference
67- 85 A19 --- Bibcode Bibcode of the reference
87- 91 F5.1 deg (O-C)theta [-17/27.9] New (O-C)θ residual (2)
93- 98 F6.3 arcsec (O-C)rho [-0.05/0.057] New (O-C)ρ residual (2)
100-104 F5.1 deg (O-C)Otheta [-15.2/82.3]? Old (O-C)θ residual (3)
106-111 F6.3 arcsec (O-C)Orho [-0.018/0.049]? Old (O-C)ρ residual (3)
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Note (1): Note as follows:
* = The quadrant was changed;
** = Measurement which is not taken into account in the orbit calculation.
Note (2): From the orbits given in this paper.
Note (3): From the previously published orbits in Ref.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 11-Sep-2018