/ftp/cats/A+A/506/./143



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J/A+A/506/143       Pulsations of HD 181231                   (Neiner+, 2009)
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	table5.dat
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Beginning of ReadMe : J/A+A/506/143 Pulsations of HD 181231 (Neiner+, 2009) ================================================================================ The pulsations of the B5IVe star HD181231 observed with CoRoT and ground-based spectroscopy. Neiner C., Gutierrez-Soto J., Baudin F., de Batz B., Fremat Y., Huat A.-L., Floquet M., Hubert A.-M., Leroy B., Diago P.D., Poretti E., Carrier F., Rainer M., Catala C., Thizy O., Buil C., Ribeiro J., Andrade L., Emilio M., Espinosa Lara F., Fabregat J., Janot-Pacheco E., Martayan C., Semaan T., Suso J., Baglin A., Michel E., Samadi R. <Astron. Astrophys. 506, 143 (2009)> =2009A&A...506..143N ================================================================================ ADC_Keywords: Stars, early-type ; Stars, Be ; Spectroscopy ; Polarization Keywords: stars: early-type - stars: emission-line, Be - stars: individual: HD181231 - stars: rotation - stars: oscillations Abstract: HD181231 is a B5IVe star, which has been observed with the CoRoT satellite during  5 consecutive months and simultaneously from the ground in spectroscopy and spectropolarimetry. By analysing these data, we aim to detect and characterize as many pulsation frequencies as possible, to search for the presence of beating effects possibly at the origin of the Be phenomenon. Our results will also provide a basis for seismic modelling. The fundamental parameters of the star are determined from spectral fitting and from the study of the circumstellar emission. The CoRoT photometric data and ground-based spectroscopy are analysed using several Fourier techniques: Clean-ng, Pasper, and Tisaft, as well as a time-frequency technique. A search for a magnetic field is performed by applying the LSD technique to the spectropolarimetric data. Description: Frequencies (in c/d and microHz) detected in the CoRoT data of HD181231 with the TiSAFT, Clean-NG, and Pasper methods. The minimum detectable frequency is 1/T=0.0064 c/d, i.e., 0.075microHz, where T is the length of the run. The error bar of the frequencies is Delta_f=1/(4T)=0.0016 c/d, i.e., 0.019 microHz. The amplitudes and phases calculated with Amphi for each of the three sets of frequencies are reported in Cols. 5 and 6 together with their error bars. The last column gives our interpretation of each frequency. Objects: ----------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------- 19 19 42.4 -00 02 59 HD 181231 = HIP 94988 -----------------------------------------------