Ha spectrum of Gamma Cassiopeiae - Tsih - HD 5394 - SAO 11482 [B0IVe] - 2015-08-26
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, 2400gr, slit 23u Resolution: 0.09 Å / pixel, resolving power = 17000
Date: 26. August 2015, 20:20 - 21:04 UT, JD 2457261.36584
Spectra with 2400 lines/mm, processed with BASS project and VSpec Calibrated with on atmospheric H2O lines, normalized flux 10 images, each 4 minutes (40 minutes) Dark corrected, cropped, enlarged by factor 4 and stacked with PixInsight Calibrated, RV-measure with HRV-MM2, RV difference measured with RVdiff | Download spectrum DAT: gamcas_Halpha_20150826.dat Download spectrum 1D FIT: gamcas_Halpha_20150826.fit Download RAW (17MB): gamCas_20150826_RAW.zip Download BASS project bundle: gamCas_20150826.bun Download complete project(1.8MB): 2015-08-26_GamCas_2400.zip |
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
