Gamma Cassiopeiae - Tsih - HD 5394 - SAO 11482 [B0IVe] - 2015-01-26
Specs
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Tsih is a typical Be star, that means there is a disk of gas around the star. The emission lines are caused by this disk.
The star rotates very fast (~ 300km/s). This could be one reason for this disk.
Telescope: Officina Stellare RC360AS, f/8, d=360mm
Spectrograph: Lhires III, 300gr, slit 23u Resolution: 1.13 A / pixel, resolving power = 1400
Date: 26. January 2015, UTC 18:58 - 20:06
2 Spectra with 300 lines/mm, processed with BASS project Calibrated with external XeNe-plasma-lamp spectrum, normalized flux Left spectrum 5 images (5x120s), right spectrum 6 images (6x120s) Dark corrected, cropped, enlarged by factor 2 and stacked with PixInsight Calibrated, instrument response corrected and merged spectrum | Download spectrum FIT: gamCas_2p65_3p15_1D.fit Download RAW (10MB): GamCas.zip Download BASS project bundle: GamCas.bun |
Stellar data (Wikipedia.org):
Constellation: Cassiopeia, RA: 00h 56m 42.50108s, Dec: +60° 43′ 00.2984″
v = 2.47 mag, Mv = -4 mag
Rv = -6.8 km/s
Distance: 550 +- 10 ly, 168 +-3 pc
Mass: 19.3 +-0.1 MΘ
Radius: ~ 10 RΘ
Luninosity: 55000 LΘ
Rotational velocity: ~300 km/s
Age: 8 +-0.4 x 10^6 years
