Long-term campaign of del Sco
Posted: Fri Aug 17, 2018 8:45 am
Dear colleagues,
after the last Halpha EW maximum (JD 2453611), the disk activity of the Be-Star delta Sco seems to be to tire. This is particularly evident in the long-term stagnant EW of the He I 6678 double peak emission since JD 2456000. Actually, I had hoped for the opposite, because I had the intention to study the the tripple-peak phenomenon of the He I 6678 emission closer.
This does not seem possible for the next few years due to the slow activities in the photospheric area, i.e. very close of the central star, and of the associated lack of disk feeding. For those, who wants to know more about triple-peak-profile of the He I678 emission, see:
http://astrospectroscopy.de/media/files/BSN_He6678.pdf
http://astrospectroscopy.de/media/files/IBVS_6179.pdf
Ernst Pollmann
after the last Halpha EW maximum (JD 2453611), the disk activity of the Be-Star delta Sco seems to be to tire. This is particularly evident in the long-term stagnant EW of the He I 6678 double peak emission since JD 2456000. Actually, I had hoped for the opposite, because I had the intention to study the the tripple-peak phenomenon of the He I 6678 emission closer.
This does not seem possible for the next few years due to the slow activities in the photospheric area, i.e. very close of the central star, and of the associated lack of disk feeding. For those, who wants to know more about triple-peak-profile of the He I678 emission, see:
http://astrospectroscopy.de/media/files/BSN_He6678.pdf
http://astrospectroscopy.de/media/files/IBVS_6179.pdf
Ernst Pollmann