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J/AJ/106/1639     Speckle observations of binary stars    (McAlister+ 1993)

ICCD speckle observations of binary stars. X. A further survey for duplicity among the bright stars McAlister H.A., Mason B.D., Hartkopf W.I., Shara M.M., <Astron. J. 106, 1639 (1993)> =1993AJ....106.1639M
ADC_Keywords: Stars, double and multiple ; Interferometry Abstract: Speckle interferometric observations from the Canada-France-Hawaii 3.6m and Cerro Tololo 4 m telescopes are reported for 1123 stars selected from the Yale Bright Star Catalogue in a continuing effort to detect new binaries among the bright stars. Thirty-two previously unresolved binaries have been detected, including companions to Xi UMa and 15 S Mon. Measures of 107 previously resolved systems, many of which resulted from earlier speckle observations, are also presented. No evidence of duplicity within a specific (m,Delta(m),rho) window of detectability was found for 984 bright stars. These observations combined with two previously published surveys represent the inspection of 2088 stars, representing 23% of the members of the Bright Star Catalogue. Many of the systems discovered earlier have shown significant orbital motions, and we present preliminary orbital elements for six binaries. Eighteen other stars previously announced as bright binaries have not been confirmed following numerous attempts to do so, and we show that their apparently spurious nature is likely due to the domination of the speckle transfer function by moderate telescope aberrations under conditions of superb seeing encountered at the CFHT in 1985. After deletion of these spurious systems, this effort has resulted in the discovery of 75 new, bright binaries. We consider some aspects of the duplicity frequencies among the diverse spectral and luminosity classes represented in this sample. We anticipate that the completion of a speckle survey of the Bright Star Catalogue would lead to the discovery of at least 200 additional binary systems with angular separations mostly below 0.20". Many of these will have periods of the order of one decade and will be accessible to complementary radial velocity programs of enhanced precision. See also: I/107 : Washington Double Star Catalog (WDS) (Worley+ 1984) J/AJ/106/352 : ICCD speckle obs. of binary stars. VIII (Hartkopf+ 1993) J/AJ/106/637 : ICCD speckle obs. of binary stars. IX (Mason+, 1993) J/AJ/108/2299 : ICCD speckle obs. of binary stars. XI (Hartkopf+ 1994) J/AJ/111/393 : ICCD speckle obs. of binary stars. XII (Al-Shukri+ 1996) J/AJ/111/936 : ICCD speckle obs. of binary stars. XIII (Hartkopf+ 1996) J/AJ/119/3084 : ICCD speckle obs. of binary stars. XXIII. (Hartkopf+, 2000) ftp://ftp.chara.gsu.edu/ : results from CHARA's long-term project J/ApJS/131/561 : Double stars with PISCO at Pic du midi (Scardia+, 2000) J/A+A/366/868 : Binary speckle measurements at Calar Alto. I. (Docobo+, 2001) J/AJ/120/2638 : CCD speckle obs. of binary stars. II. (Horch+, 2000) File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 80 44 Measurements of new binaries table2.dat 80 116 Measurements of known binaries table3.dat 14 697 Negative results from CFHT table4.dat 14 286 Negative results from CTIO table5.dat 48 18 Unresolved speckle binaries table6.dat 80 18 Apparently spurious binaries table7.dat 80 235 Observational history of new bright star binaries table8.dat 55 6 Preliminary orbital elements
Byte-by-byte Description of file: table1.dat table2.dat table7.dat
Bytes Format Units Label Explanations
1- 10 A10 --- WDS Epoch 2000.0 coordinates used as designator in the Washington Double Star Catalogue I/107 maintained by Charles Worley at the U.S. Naval Observatory (hhmmmSddmm, Cat. I/237). 14- 18 A5 --- HR Harvard Revised (catalog V/50) number 20- 24 A5 --- CHARA Newly assigned CHARA discovery number (table1 and table7 only) 26- 37 A12 --- Discov Discovered (table2 only) 39- 42 F4.2 mag Vmag Visual magnitude from the Bright Star Catalogue (BSC; Hoffleit, D. 1982, see catalog V/50) 43 A1 --- n_Vmag [ RH] Visual magnitude code (1) 45- 52 A8 --- Sp MK spectral type from BSC 54- 55 I2 --- Ncomp []? Number of components, N, from the BSC and incremented to reflect the new companions (table1 only) 57- 65 F9.4 yr Obs []? Epoch of the observation as the fraction of the Besselian year 67- 71 F5.1 deg theta []? Position angle of new measurement 73- 78 F6.3 arcsec rho []? Angular separation of new measurement 80 I1 --- Ref [1/5]? Reference number (table7 only) (2)
Note (1): Visual magnitude code: ' ' = V on UBV (Johnson) system 'R' = HR magnitudes reduced to the UBV system 'H' = original HR magnitude Note (2): References: 1) McAlister & Hartkopf (1988, Second Catalog of Interferometric Measurements of Binary Stars, CHARA Contribution No. 2, Georgia State University 2) McAlister et al. (1990AJ.....99..965M) 3) McAlister et al. (1992AJ....104..810H) 4) Repeated from Table 2 5) New measurement
Byte-by-byte Description of file: table3.dat table4.dat
Bytes Format Units Label Explanations
1- 5 A5 --- HR HR number from the BSC 7- 14 A8 --- note Footnotes separated by comma and enclosed in parentheses (1)
Note (1): Also found to be single in: (1) McAlister (1978PASP...90..288M) (2) McAlister & Hendry (1981PASP...93..221M) (3) Hartkopf & McAlister (1984PASP...96..105H) (4) McAlister et al. (1987AJ.....93..183M) (BSS1) (5) Lu et al. (1987AJ.....94.1318L) (6) McAlister et al. (1989AJ.....97..510M) (BSS2) (7) Mason et al. (1993AJ....106..637M) (8) Table 4 (9) Table 3
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 5 A5 --- HR HR number from the BSC (cat. V/50) 7- 18 A12 --- Name Name 19- 21 I3 --- note [1/4] Reference number (1) 22- 25 I4 --- Meas Number of measurements 26- 29 I4 --- Neg Number of negative measurements 33- 48 A16 --- Comment Comments
Note (1): Reference numbers: 1) McAlister & Hartkopf (1988, Second Catalog of Interferometric Measurements of Binary Stars, CHARA Contribution No. 2, Georgia State University) 2) Weigelt & Wirnitzer (1983, Opt. Lett., 8, 389) 3) McAlister et al. (1992AJ....104..810H) 4) Isobe et al. (1990, Publ. Nat. Astron. Obs. Japan 1, 217) =1990PNAOJ...1..217I
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 10 A10 --- WDS Epoch 2000.0 coordinates used as designator in the Washington Double Star Catalogue I/107 maintained by Charles Worley at the U. S. Naval Observatory (hhmmmSddmm). 14- 18 A5 --- HR HR number from the BSC V/50 21- 23 A3 --- CHARA CHARA number 29- 37 F9.4 yr EpDiscov "Discovery" epoch 42- 46 F5.1 deg theta Position angle, theta 50- 54 F5.3 arcsec rho Angular separation, rho 59- 60 I2 --- Nconf Number of attempted confirmations 63- 69 F7.2 yr Confmin Duration of confirmation attempts, minimum 73- 79 F7.2 yr Confmax Duration of confirmation attempts, maximum
Byte-by-byte Description of file: table8.dat
Bytes Format Units Label Explanations
1- 5 A5 --- HR HR number from the BSC V/50 6- 11 F6.2 yr P Period 12- 18 F7.3 arcsec a Semi-major axis 19- 25 F7.1 deg i Inclination 26- 32 F7.1 deg OMEGA Longitude of ascending node 33- 41 F9.2 yr T Epoch of periastron 42- 48 F7.3 --- e Eccentricity 49- 55 F7.1 deg omega Longitude of perihelion
Origin: AAS CD-ROM series, Volume 1, 1993 References: McAlister et al., Paper I 1987AJ.....93..183M McAlister et al., Paper II 1987AJ.....93..688M Lu et al., Paper III 1987AJ.....94.1318L McAlister et al., Paper IV 1989AJ.....97..510M McAlister et al., Paper V 1990AJ.....99..965M Hartkopf et al., Paper VI 1992AJ....104..810H Mason et al., Paper VII 1993AJ....105..220M Hartkopf et al., Paper VIII 1993AJ....106..352H, Cat. J/AJ/106/352 Mason et al., Paper IX 1993AJ....106..637M, Cat. J/AJ/106/637 McAlister et al., Paper X 1993AJ....106.1639M, Cat. J/AJ/106/1639 Hartkopf et al., Paper XI 1994AJ....108.2299H, Cat. J/AJ/108/2299 Al-Shukri et al., Paper XII 1996AJ....111..393A, Cat. J/AJ/111/393 Hartkopf et al., Paper XIII 1996AJ....111..936H, Cat. J/AJ/111/936 McAlister et al., Paper XIV 1996AJ....112.1169M Mason et al., Paper XV 1996AJ....112.2260M Fu et al., Paper XVI 1997AJ....114.1623F Hartkopf et al., Paper XVII 1997AJ....114.1639H Mason et al., Paper XVIII 1997AJ....114.2112M Mason et al., Paper XIX 1998AJ....115..821M Hartkopf et al., Paper XXII 1999AJ....118..509H Hartkopf et al., Paper XXIII 2000AJ....119.3084H, Cat. J/AJ/119/3084
(End) Patricia Bauer [CDS] 27-Jun-1994
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