Hα spectrum of Alpha Cygni - Deneb - HD 197345 - SAO 49941 [A2Ia]

Deneb - Alpha Cygni

Alpha Cygni is a prototype of variable stars which exhibit non-radial pulsations, meaning that some portions of the stellar surface are contracting at the same time, other pats expand.

It is a supergiant star in the passage of blue giant to red giant.

Stellar wind is shown in the spectra profile of Ha.

 
Telescope: Celestron C11, f/10, d=280mm Spectra with 2400 lines/mm, processed with BASS project Download spectrum 1D FIT:  deneb_20151202_Ha.FIT
Spectrograph: Lhires III, 2400gr, slit 23u Calibrated with on atmospheric H2O lines, relative flux  Download spectrum FIT (dry): deneb_20151202_dry.FIT
Camera: SBIG STT-8300M 13 images, each 240 seconds (52 minutes) Download spectrum FIT (RAW, 1,8MB): Deneb_13x4min_20151202.fit
Resolution: 0.0693 Å / pixel, resolving power = 18600 Dark and Flat corrected, cropped, enlarged by factor 2 and stacked with PixInsight Download BASS project: Deneb_20151202.bun Deneb_20151202_V.bun Deneb_20151202_V_compare.bun
Acquisition software: SbigControl Guiding Software: DMKguider Calibrated with BassProject Download complete project(1.1MB): Deneb_20151202.zip
Date: 2. December 2015,  20:01- 20:57 UT, JD 2457359.35 S/N: > 400  
 
Alphs Cygni
Alpha Cygni
Alpha Cygni
Stellar data (Wikipedio.org):
Constellation: Cygnus, RA: 20h 41m 25.915s, Dec: +45° 16′ 49.217″
v = 1.25 mag, Mv = -8.6 mag
Rv = -4.9 km/s
Distance: 3000 +- 2000 ly, 1000 +-600 pc
Mass: 20 - 25 MΘ
Radius: ~ 100 - 200 RΘ
Luninosity: 250000 LΘ
Rotation: 80 days
Temperature: 8400 K