Access to Astronomical Catalogues

← Click to display the menu
J/A+A/394/151   Multiplicity among chemically peculiar stars II (Carrier+, 2002)

Multiplicity among chemically peculiar stars. II. Cool magnetic Ap stars. Carrier F., North P., Udry S., Babel J. <Astron. Astrophys. 394, 151 (2002)> =2002A&A...394..151C
ADC_Keywords: Stars, Ap ; Binaries, spectroscopic ; Radial velocities Keywords: stars, chemically peculiar - stars: spectroscopic binaries - stars: fundamental parameters Description: We present new orbits for sixteen Ap spectroscopic binaries, four of which might in fact be Am stars, and give their orbital elements. Four of them are SB2 systems: HD 5550, HD 22128, HD 56495 and HD 98088. The twelve other stars are : HD 9996, HD 12288, HD 40711, HD 54908, HD 65339, HD 73709, HD 105680, HD 138426, HD 184471, HD 188854, HD 200405 and HD 216533. Rough estimates of the individual masses of the components of HD 65339 (53 Cam) are given, combining our radial velocities with the results of speckle interferometry and with Hipparcos parallaxes. Considering the mass functions of 74 spectroscopic binaries from this work and from the literature, we conclude that the distribution of the mass ratio is the same for cool Ap stars as for normal G dwarfs. Therefore, the only differences between binaries with normal stars and those hosting an Ap star lie in the period distribution: except for the case of HD 200405, all orbital periods are longer than (or equal to) 3 days. A consequence of this peculiar distribution is a deficit of null eccentricities. There is no indication that the secondary has a special nature, like e.g. a white dwarf. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 60 164 Star positions (from Simbad) table1.dat 60 1913 Individual RVs and correlation dip parameters table2.dat 98 123 Average RVs, Vsini upper limits, P(chi2) etc. table3.dat 48 48 Ap stars showing no CORAVEL dip
See also: III/162 : General Catalogue of Ap and Am stars (Renson+ 1991) III/199 : Observed Periods of Ap and Bp stars (Catalano+ 1998) J/A+AS/130/223 : Multiplicity among chemically peculiar stars. I (North+, 1998) J/A+A/385/488 : Search for duplicity in periodic Be stars (Carrier+, 2002) Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [HD] 4- 9 I6 --- HD HD number (Cat. III/135) 14- 15 I2 h RAh Right ascension (J2000) 17- 18 I2 min RAm Right ascension (J2000) 20- 23 F4.1 s RAs Right ascension (J2000) 25 A1 --- DE- Declination sign (J2000) 26- 27 I2 deg DEd Declination (J2000) 29- 30 I2 arcmin DEm Declination (J2000) 32- 33 I2 arcsec DEs Declination (J2000)
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number 9- 19 F11.3 d HJD Heliocentric Julian Date 21 I1 --- Comp [1/2] Component in a binary. 1: primary, 2: secondary 23- 29 F7.2 km/s RV Radial velocity 31- 35 F5.2 km/s e_RV Estimated standard deviation of one RV measurement 38- 42 F5.3 --- PR Relative depth of the correlation dip (1) 44- 48 F5.3 --- e_PR Standard deviation on the relative depth (1) 50- 54 F5.2 km/s XL Width of the correlation dip (1) 56- 59 F4.2 km/s e_XL Standard deviation on the width (1)
Note (1): undefined if 0.00 or 9.99
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number 8 A1 --- Comp [ab] Component in a binary. a: primary, b: secondary 10- 14 A5 --- Rns Renson number (Cat. III/162) 16- 26 A11 --- ST Spectral type 28- 32 F5.2 mag B-V Johnson's B-V index 34- 39 F6.2 km/s RV Mean radial velocity 41- 44 F4.2 km/s e_RV Standard deviation on the mean RV 46- 49 F4.2 km/s SCAT External scatter (sigma) of the RV values 51- 55 F5.2 --- E/I Ratio of external to internal errors 57- 59 I3 --- Nmeas Number of CORAVEL measurements used in the statistics (= total number of measurements, except for some binary components) 61- 64 I4 d SPAN Time span of the CORAVEL measurements 66- 69 F4.1 km/s Vsini Upper limit to vsini 71- 74 F4.1 km/s e_Vsini ?=99.9 Standard deviation on Vsini 76- 80 F5.3 --- P(chi2) ?=9.999 Probability of no intrinsic RV variation 82- 98 A17 --- Rem Remark (1)
Note (1): Remarks: NC98 = North et al. (1998, Cat. J/A+AS/130/223) M98 = Mkrtichian et al. (1998CoSka..27..238M) N48 = Northcott (1948AJ.....53..116N)
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number 7 A1 --- Comp [A] Component in a visual double. A: primary 9- 13 A5 --- Rns Renson number 15- 25 A11 --- SpType Spectral type 27- 48 A22 --- Rem Remark
Acknowledgements: Fabien Carrier References: North et al., Paper I 1998A&AS..130..223N, Cat. J/A+AS/130/223
(End) Patricia Bauer [CDS] 05-Aug-2002
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

catalogue service