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J/A+A/442/365       Astrometric orbits of SB9 stars      (Jancart+, 2005)

Astrometric orbits of SB9 stars. Jancart S., Jorissen A., Babusiaux C., Pourbaix D. <Astron. Astrophys., 442, 365-380 (2005)> =2005A&A...442..365J
ADC_Keywords: Binaries, spectroscopic ; Binaries, orbits Keywords: astrometry - stars: binaries: spectroscopic - stars: fundamental parameters Abstract: Hipparcos Intermediate Astrometric Data (IAD) have been used to derive astrometric orbital elements for spectroscopic binaries from the newly released Ninth Catalogue of Spectroscopic Binary Orbits (SB9^_). This endeavour is justified by the fact that (i) the astrometric orbital motion is often difficult to detect without the prior knowledge of the spectroscopic orbital elements, and (ii) such knowledge was not available at the time of the construction of the Hipparcos Catalogue for the spectroscopic binaries which were recently added to the SB9^_ catalogue. Among the 1374 binaries from SB9^_ which have an HIP entry (excluding binaries with visual companions, or DMSA/C in the Double and Multiple Stars Annex), 282 have detectable orbital astrometric motion (at the 5% significance level). Among those, only 70 have astrometric orbital elements that are reliably determined (according to specific statistical tests), and for the first time for 20 systems. This represents a 8.5% increase of the number of astrometric systems with known orbital elements (The Double and Multiple Systems Annex contains 235 of those DMSA/O systems). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 8 282 The 282 stars flagged as astrometric binaries (Pr1, Pr2, Pr3<0.05 and F2TI<2.37) table3.dat 90 70 The 70 orbital solutions (Campbell solutions) passing all consistency tests. table4.dat 91 31 The 31 new orbital solutions (Campbell solutions) passing the Pr1, Pr2 and Pr3 tests at the 0.006% level, but failing at least one of the consistency tests. table5.dat 117 39 The 39 systems with a DMSA/O entry which do not fulfill the 2 tests assessing the reliability of the astrometric orbital elements, namely ξ<3 and ε>0.4 and the probability tests at the 0.006% level (see text). table6.dat 97 29 Masses and mass ratios for the 29 systems with main-sequence primaries passing all consistency tests. refs.dat 80 66 References
See also: B/sb9 : 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2009) I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HIP HIP (Cat. I/239) number 8 A1 --- n_HIP [f] f for stars passing the Pr1, Pr2 and Pr3 tests at the more stringent 0.006% level, and F2TI<2.37
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HIP HIP (Cat. I/239) number 8- 12 F5.2 mas a0 Relative semi-major axis 14- 17 F4.2 mas e_a0 rms uncertainty on a0 19- 23 F5.3 --- e Eccentricity 25- 30 F6.2 deg incl Inclination 32- 36 F5.2 deg e_incl rms uncertainty on incl 38- 43 F6.2 deg omega1 Argument of the periastron 45- 50 F6.2 deg OMEGA Latitude of the ascending node 52- 57 F6.2 deg e_OMEGA rms uncertainty on OMEGA 59- 67 F9.1 d T0 HJD of origin 69- 74 F6.1 d Per Period 76 A1 --- DMSA DMSA system type (from HIP), O=orbital solution 77 A1 --- --- [(] 78- 81 F4.2 --- a/ahip ? Orbital semi-major axes ratio, DMSA/O annex/this work 82 A1 --- --- [;-] 83- 86 F4.2 --- i/ihip ? Inclinations ratio, DMSA/O annex/this work 87 A1 --- --- [)] 89- 90 I2 --- Ref Reference for the spectroscopic orbit used
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HIP HIP (Cat. I/239) number 8- 13 F6.2 mas a0 Relative semi-major axis 15- 22 F8.2 mas e_a0 rms uncertainty on a0 24- 27 F4.2 --- e Eccentricity 29- 33 F5.1 deg incl Inclination 35- 38 F4.1 deg e_incl rms uncertainty on incl 40- 44 F5.1 deg omega1 Argument of the periastron 47- 51 F5.1 deg OMEGA Latitude of the ascending node 53- 56 F4.1 deg e_OMEGA rms uncertainty on OMEGA 59- 67 F9.1 d T0 HJD of origin 69- 75 F7.1 d Per Period 78 A1 --- DMSA DMSA system type 80- 83 F4.2 --- xi Values of the corresponding empirical tests 85- 88 F4.2 --- epsilon Values of the corresponding empirical tests 90- 91 I2 --- Ref Reference for the spectroscopic orbit used
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HIP HIP (Cat. I/239) number 8 A1 --- xi [y/n] xi<3 ? (1) 10 A1 --- epsilon [y/n] epsilon>0.4 (1) 12 A1 --- Pr [y/n] Probability tests at the 0.006% level (1) 14-117 A104 --- Rem Remarks
Note (1): n correspond to failed tests.
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HIP HIP (Cat. I/239) number 8- 11 F4.2 solMass M1 ?=- Mass of the primary 13- 16 F4.2 solMass M2 ?=- Mass of the secondary 18- 21 F4.2 --- M2/M1 ?=- M2/M1 mass ratio 23- 28 F6.4 --- Q Q ratio, Q=(M23)/((M1+M2)2) 30- 37 A8 --- SpType MK spectral type 38- 97 A60 --- Rem Remarks
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Ref Reference number 4- 22 A19 --- BibCode BibCode 24- 43 A20 --- Aut Author's name 45- 80 A36 --- Com Comments
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 28-Jul-2006
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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