J/A+A/429/309       HR 1099 radial velocities                    (Frasca+, 2005)

Orbital period variation in close binaries from radial velocity data and magnetic activity cycles. II. HR 1099. Frasca A., Lanza A.F. <Astron. Astrophys. 429, 309 (2005)> =2005A&A...429..309F 2005A&A...429..309F
ADC_Keywords: Stars, variable ; Radial velocities Keywords: stars: binaries: close - stars: activity - stars: binaries spectroscopic - stars: individual: HR 1099 Abstract: We studied orbital period changes in the non-eclipsing close binary HR 1099, one of the most bright members of the RS CVn class of magnetically active binary systems. Intermediate-resolution optical spectroscopy and IUE archive spectra were used to build radial-velocity curves yielding epochs of superior conjunction with an accuracy of 0.01 days. The final database ranged from 1976 to 2002 and allowed us a better assessment of the amplitude of the orbital period variation and its timescale. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 03 36 47.3 +00 35 16 HR 1099 = HD 22468 ---------------------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 39 159 Radial velocities from IUE spectra table2.dat 47 137 Radial velocity of the G5 V and K1 IV components of HR 1099 from Osservatorio Astrofisico di Catania (OAC) optical spectra tables.tex 92 449 LaTeX version of the tables -------------------------------------------------------------------------------- See also: VI/110 : Final Merged Log of IUE Observations (NASA-ESA, 2000) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 8 A8 --- Spectrum Spectrum designation in IUE Archive 11- 23 F13.5 d HJD Heliocentric Julian date 29- 33 F5.1 km/s RVG5 Radial velocity of the G5 V component of HR 1099 37- 39 F3.1 km/s e_RVG5 rms uncertainty on RVG5 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 13 F13.5 d HJD Heliocentric Julian date 18- 23 F6.2 km/s RVG5 ? Radial velocity of the G5 V component of HR 1099 28- 30 F3.1 km/s e_RVG5 ? rms uncertainty on RVG5 35- 39 F5.1 km/s RVK1 ? Radial velocity of the K1 IV component of HR 1099 44- 46 F3.1 km/s e_RVK1 ? rms uncertainty on RVK1 -------------------------------------------------------------------------------- Acknowledgements: Antonio Frasca, afr(at)ct.astro.it
(End) Patricia Vannier [CDS] 07-Sep-2004
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