Access to Astronomical Catalogues

← Click to display the menu
J/A+A/364/665       Very low mass stars radial velocities    (Segransan+, 2000)

Accurate masses of very low mass stars: III. 16 new or improved masses Segransan D., Delfosse X., Forveille T., Beuzit J.-L., Udry S., Perrier C., Mayor M. <Astron. Astrophys. 364, 665 (2000)> =2000A&A...364..665S
ADC_Keywords: Stars, double and multiple ; Radial velocities ; Stars, nearby Keywords: stars: binaries: general - stars: binaries: spectroscopic - stars: binaries: visual - stars: low-mass, brown dwarfs - techniques: radial velocities - stars: late-type Abstract: We have obtained adaptive optics images and accurate radial velocities for 7 very low mass objects, In the course of a long term effort to determine accurate masses for very low mass stars (M<0.6 M☉). We use the new data, together with measurements from the literature for some stars, to determine new or improved orbits for these 7 systems. They provide masses for 16 very low mass stars with accuracies that range between 0.2% and 5%, and in some cases a very accurate distance as well. This information is used in a companion paper to discuss the Mass-Luminosity relation for the V, J, H and K photometric bands. Description: Files table 4 to 10 contains radial velocity measurements of the stellar multiple system Gl 234A, YY Gem ab, GJ 2069Aab, Gl 644ABC, Gl 747AB, Gl 831AB and Gl 866ABC. Files table 11 to 15 contains angular separation measurements of the multiple stellars system Gl 234AB, Gl 644A-BC, Gl 747AB, Gl 831AB and Gl 866AC-B. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 45 12 Star positions (from Simbad) tab4-10.dat 75 170 Radial velocity measurements (table 4 to 10) tab11-14.dat 78 38 Angular separation measurements (tables 11 to 14) table15.dat 108 41 Angular separation measurements of Gl 866 AC-B refs.dat 69 14 References
See also: J/MNRAS/301/1031 : High resolution spectra of VLM stars (Tinney+ 1998) J/A+AS/109/29 : Very low mass stars in Praesepe (Hambly+, 1995) Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Name Star name 8- 11 A4 --- m_Name Components of system 13- 20 A8 --- GJ GJ designation 23- 24 I2 h RAh Right ascension (J2000.0) 26- 27 I2 min RAm Right ascension (J2000.0) 29- 32 F4.1 s RAs Right ascension (J2000.0) 34 A1 --- DE- Declination sign (J2000.0) 35- 36 I2 deg DEd Declination (J2000.0) 38- 39 I2 arcmin DEm Declination (J2000.0) 41- 42 I2 arcsec DEs Declination (J2000.0)
Byte-by-byte Description of file: tab4-10.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Name Star name 8- 11 A4 --- m_Name Components of system 13- 24 F12.4 d HJD Julian day of the observation 26- 33 F8.3 km/s RVa Radial velocity measurement of component A 35- 39 F5.3 km/s e_RVa Error associated to Va 41- 48 F8.3 km/s RVb ? Radial velocity measurement of component B 50- 55 F6.3 km/s e_RVb ? Error associated to Vb 57- 63 F7.3 km/s RVc ? Radial velocity measurement of component C 65- 68 F4.2 km/s e_RVc ? Error associated to Vc 70- 71 I2 ---- r_RV Reference of the radial velocity measurement in refs.dat file
Byte-by-byte Description of file: tab11-14.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Name Star name 8- 11 A4 --- m_Name Components of system 13- 23 F11.3 d HJD Julian day of the observation 25- 30 F6.4 arcsec rho ? Separation 32- 36 F5.4 arcsec e_rho ? Error associated to rho 38- 42 F5.1 deg theta ? Angular separation 44- 47 F4.1 deg e_theta ? Error associated to theta 50- 54 F5.3 arcsec proj ? Projected separation 56- 59 F4.3 arcsec e_proj ? Error in projected separation 61- 64 F4.1 deg PA ? Position angle 66- 75 A10 ---- Method Observational method 77- 78 I2 ---- r_rho Reference of the measurement (in refs.dat file)
Byte-by-byte Description of file: table15.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Name Star name 8- 11 A4 --- m_Name Components of system 13- 23 F11.3 d HJD Julian day of the observation 25- 28 F4.3 arcsec rho ? Separation 30- 33 F4.3 arcsec e_rho ? Error associated to rho 35- 39 F5.1 deg theta ? Angular separation 41- 43 F3.1 deg e_theta ? Error associated to theta 45- 49 F5.3 arcsec X ? Separation in North-South direction 51- 54 F4.3 arcsec e_X ? Error associated to X 56- 60 F5.3 arcsec Y ? Separation in East-West direction 62- 65 F4.3 arcsec e_Y ? Error associated to Y 67- 86 A20 ---- Method Observational method 88-108 A21 ---- r_rho Reference of the measurement (in refs.dat file)
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- 42 A19 --- Aut Author's name 44- 64 A21 --- Com Comments
Acknowledgements: Xavier Delfosse References: Forveille et al., Paper I 1999A&A...351..619F Delfosse et al., Paper II 1999A&A...350L..39D
(End) Patricia Bauer [CDS] 28-Nov-2000
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

© UDS/CNRS

Contact