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J/A+A/334/863       II Peg radial velocities     (Berdyugina+ 1998)

The active RS Canum Venaticorum binary II Pegasi. I. Stellar and orbital parameters. Berdyugina S.V., Jankov S., Ilyin I., Tuominen I., Fekel F.C. <Astron. Astrophys. 334, 863 (1998)> =1998A&A...334..863B (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, spectroscopic ; Radial velocities Keywords: stars: binaries: spectroscopic - stars: fundamental parameters - stars: abundances - stars: activity - stars: individual: II Peg Abstract: A detailed model atmosphere analysis of high-resolution and high S/N CCD spectra of IIPeg has yielded for the first time a self-consistent set of fundamental parameters of the primary component: Teff=4600K, logg=3.2, [M/H]=-0.4, ξt=2.0km/s. In addition, 121 new high quality radial velocity measurements allowed us to determine improved orbital parameters, resulting in a new orbital ephemeris of Tconj=2449582.9268+6.724333E. The position of the primary of II Peg in the HR diagram with the new parameters corresponds to a K2 IV star with mass ≃0.8M. The evolved character of the star is confirmed by the C/N ratio, which is reduced significantly relative to the solar value. The unspotted V magnitude of the star of 6.9mag is estimated from the observed variations of the TiO bands and quasi-simultaneous photometry. The blend of LiI 6707Å is suspected to vary in equivalent width due to spot modulation. The lithium abundance for the unspotted star, Li/H=1.0±0.1, is found to be consistent with other post-main sequence chromospherically active stars. Combining all parameters, the radius R≃3.4R and the inclination i≃60° of the primary are estimated with the assumption that its rotational axis is perpendicular to the orbital plane. The secondary is probably a M0-M3 V star with a mass of about 0.4M. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 23 55 01.8 +28 37 59 II Peg = HD 224085 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 20 157 Radial velocity data
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 11 F11.3 d HJD Heliocentric Julian date 13- 17 F5.1 km/s RV Radial velocity 19 I1 --- r_RV [1/9] Reference for radial velocity (1)
Note (1): 1: Sanford (1921ApJ....53..201S) 2: Halliday (1952JRASC..46..103H) 3: Heard (1956PDDO....2..105H) 4: Rucinski (1977PASP...89..280R) 5: Vogt (1981ApJ...247..975V) 6: SOFIN echelle spectrograph (Nordic Optical Telescope, Roque de los Muchocohs Observatory 7: Crimea Astrophysical Observatory 8: McDonald Observatory 9: Kitt Peak National Observatory
History: Prepared via OCR at CDS.
(End) Patricia Bauer [CDS] 19-May-1998
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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