Hα 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 | Spectra with 2400 lines/mm, processed with BASS project and VSpec | Download spectrum DAT: gamcas_Halpha_20150816.dat |
| Spectrograph: Lhires III, 2400gr, slit 23u | Calibrated with on atmospheric H2O lines, normalized flux | Download spectrum 1D FIT: gamcas_Halpha_20150816.fit |
| Camera: SBIG ST10-Xe | 10 images, each 4 minutes (40 minutes) | Download RAW (17MB): gamCas_20150826_RAW.zip |
| Resolution: 0.09 Å / pixel, resolving power = 17000 | Dark corrected, cropped, enlarged by factor 4 and stacked with PixInsight | Download BASS project bundle: gamCas_20150826.bun |
| Acquisition software: SbigControl | Calibrated, RV-measure with HRV-MM2 | Download complete project(1.8MB): 2015-08-26_GamCas_2400.zip |
| Date: 26. August 2015, 20:20 - 21:04 UT, JD 2457261.36584 | RV difference measured with RVdiff | |
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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 | ||
