Delta Scorpii (Dschubba) is a spectroscopic binary B star. The period is 10.8092 years and the last periastron was at 2011 July 3.
The emission lines are caused by a disk around the B star.
Ha calibrated with internal telluric lines, normalized flux
Exposure time: 8 x 180s
Dark- corrected and stacked with SpectroCalc
Full reduction process: SpectroCalc
|Download spectrum 1D FIT: delSco_20190625_Ha_Manfred_Schwarz.fit|
Download LOG file of SpectroCalc: LOG.TXT
Stellar data (Wikipedia.org):
Constellation: Scorpius, RA: 16h 00m 20s, Dec: -22° 37′ 18.1″
v = 2.3 mag, Mv = -3.8 mag
Distance: 444 ly, 136 pc
Mass: A ~ 13, B ~ 8.2 MΘ
Radius: A ~ 6.7 - 1900 RΘ
Luninosity: A ~ 38000 LΘ
Surface Temperature: A: ~27400 K