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: Celestron C11, f/10, d=280mm | Spectra with 2400 lines/mm, processed with BASS project | Download spectrum 1D FIT: gamCas_20161031_Ha_Manfred_Schwarz.FIT |
| Spectrograph: Lhires III, 2400gr, slit 23u | Calibrated on atmospheric H2O lines, normalized flux | Download RAW spectrum (580KB): gamCas_20161031_16x2min_RAW.fit |
| Camera: SBIG STT-8300M | 16 images, each 120 seconds (32 minutes) | Download spectrum 1D DAT(dry): gamcas_norm_contcorr_dry.dat |
| Resolution: 0.0693 Å / pixel, resolving power = 18600 | Dark corrected and stacked with PixInsight | Download BASS project bundle: gamCas_20161031_1815.bun |
| Acquisition and Guiding software: SbigControl | RV-measure with HRV-MM2 | Download rest of project(620kB): gamCas_20161031.zip |
| Date: 31. January 2016, 17:58- 18:32 UT, JD 2457693.264 | ||
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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 | ||
