spectrum of Gamma Cassiopeiae - Tsih - HD 5394 - SAO 11482 [B0IVe]
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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. |
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| Telescope: Officina Stellare RC360AS, f/8, d=360mm | 2 Spectra with 300 lines/mm, processed with BASS project | Download spectrum FIT: gamCas_2p65_3p15_1D.fit |
| Spectrograph: Lhires III, 300gr, slit 23u | Calibrated with external XeNe-plasma-lamp spectrum, normalized flux | Download RAW (10MB): GamCas.zip |
| Camera: SBIG ST10-Xe | Left spectrum 5 images (5x120s) | Download BASS project bundle: GamCas.bun |
| Resolution: 1.13 A / pixel, resolving power = 1400 | Right spectrum 6 images (6x120s) | |
| Acquisition software: SbigControl | Dark corrected, cropped, enlarged by factor 2 and stacked with PixInsight | |
| Date: 26. January 2015, UTC 18:58 - 20:06 | Calibrated, instrument response corrected and merged spectrum | |
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| Stellar data (Wikipedio.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 | ||
