J/A+A/578/A64 Velocity curve of {tau} Boo A (Borsa+, 2015) ================================================================================ The GAPS Programme with HARPS-N at TNG. VII. Putting exoplanets in the stellar context: magnetic activity and asteroseismology of tau Bootis A. Borsa F., Scandariato G., Rainer M., Bignamini A., Maggio A., Poretti E., Lanza A.F., Di Mauro M.P., Benatti S., Biazzo K., Bonomo A.S., Damasso M., Esposito M., Gratton R., Affer L., Barbieri M., Boccato C., Claudi R.U., Cosentino R., Covino E., Desidera S., Fiorenzano A.F.M., Gandolfi D., Harutyunyan A., Maldonado J., Micela G., Molaro P., Molinari E., Pagano I., Pillitteri I., Piotto G., Shkolnik E., Silvotti R., Smareglia R., Southworth J., Sozzetti A., Stelzer B. =2015A&A...578A..64B ================================================================================ ADC_Keywords: Stars, double and multiple ; Planets ; Spectroscopy ; Radial velocities Keywords: stars: individual: tau Boo - planetary systems - asteroseismology - techniques: spectroscopic - stars: activity Abstract: We observed the tau Boo system with the HARPS-N spectrograph in order to test a new observational strategy aimed to jointly study asteroseismology, the planetary orbit and star-planet magnetic interaction. We collected high-cadence observations on 11 nearly consecutive nights, and for each night averaged the raw FITS files using dedicated software in order to obtain high S/N spectra to study the variation of the CaII H&K lines and radial velocity values free from stellar oscillations without losing this latter information. Specific software was written to build a new custom mask used to refine the RV determination with the HARPS-N pipeline and to perform the spectroscopic analysis. We updated the planetary ephemeris and proved the acceleration due to the stellar binary companion. The study of stellar activity variation suggests the presence of an high-latitude plage during the time span of our observations. The correlation between the chromospheric activity and the planetary orbital phase remains unclear. Solar-like oscillations are detected in the radial velocity time series: we estimate asteroseismic quantities finding good agreement with theoretical predictions. With the stellar model built we find for tau Boo an age of 0.9+/-0.5Gyr, and could further constrain the value of the stellar mass to 1.38+/-0.05M_{sun}_. Description: HARPS-N radial velocities of tau Boo. Objects: -------------------------------------------------- RA (2000) DE Designation(s) -------------------------------------------------- 13 47 15.74 +17 27 24.8 tau Boo A = GJ 527 A -------------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 34 324 HARPS-N radial velocities of {tau} Boo -------------------------------------------------------------------------------- See also: J/A+A/554/A28 : Qatar-1 differential light curve (Covino+, 2013) J/A+A/575/A111 : GAPS V: Global analysis of the XO-2 system (Damasso+, 2015) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 11 F11.6 d BJD Time of observation (BJD-2450000) 13- 21 F9.2 m/s RV [-17089/-16128] Radial velocity 23- 26 F4.2 m/s e_RV [0.51/2.52] Radial velocity error 28- 34 F7.2 m/s BS [-167/-39] Bisector span -------------------------------------------------------------------------------- Acknowledgements: Francesco Borsa, francesco.borsa(at)brera.inaf.it References: Covino et al., Paper I 2013A&A...554A..28C, Cat. J/A+A/554/A28 Desidera et al., Paper II 2013A&A...554A..29D Esposito et al., Paper III 2014A&A...564L..13E Desidera et al., Paper IV 2014A&A...567L...6D Damasso et al., Paper V 2015A&A...575A.111D, Cat. J/A+A/575/A111 Sozzetti et al., Paper VI 2015A&A...575L..15S ================================================================================ (End) Francesco Borsa [INAF-OA Brera, Italy], Patricia Vannier [CDS] 31-Mar-2015