The Be-binary star ζ Tau shows periodic behaviour in the radial velocity of the HeI 6678 absorption line. There is a serious request from professional astronomers to amateurs to contribute their observations to the monitoring of this parameter. Fortunately it´s fairly easy, even with relative (...)
Halpha V/R time behaviour in pi Aqr
The V/R measurements in Hα spectra of the binary star π Aqr since October 2004 until today, makes possible an analysis of a possible periodic behavior.
Fig. 1 shows the V/R time behaviour in seven visibility phases, fig. 2 shows in power spectrum a dominant (...)
On Friday february 20th, 2011, we had a meeting in Meudon, between Amateurs (V. Desnoux, M. Bonnement, P. Chambraud, O. Thizy, F. Cochard) and Professionals (C. Neiner, M. Floquet, E. Alecian, B. De Batz, B. Leroy).
The goal was to discuss the best way to analyse available BeSS data.
BeSS is a professional/amateur program that started in 2007. Today it has more than 12,000 spectra for more than 2000 Be stars. BeSS data has been used by more than 53 scientific publications.
During the week of October 23 - 27, 2017, we celebrated the tenth birthday of the BeSS program. (...)