GAMMA CAS (Gamma Cassiopeiae). High overhead in northern autumn evenings lies the W- shaped constellation Cassiopeia, in mythology the Queen and mother to Andromeda, ...
Gamma Cas is a prototype of an important class of variable.
"Gamma Cas" variables are B stars, very rapidly rotating subgiants or even dwarfs with emission spectra. The variation in magnitude is typically quite small.
[1880] gamma Cassiopeiae is the central star of the constellation. It is an eruptive variable star. It does not have a traditional Latin or Arabic name, but the Chinesse call it Tsih ("the whip").
Gamma Cas, sometimes called Tsi (chin.: the whip), is an unstable blue subgiant (spectraltype B0IVe), that throws off shells of gas at unpredictable intervals. So it brightness vary between 2nd mag and 3rd mag.
The middle star, known as Gamma Cass for want of a historical name, is a brilliant white binary, magnitudes 2 and 11, the first star found with bright emission spectral lines.
Also known as the S Doradus variables, the most luminous stars known belong to this class. Examples include the hypergiants Î- Carinae and P Cygni. Gamma Cassiopeiae variables ...
Sun, Sol, in the part (1:47:44.8+63:51:9.0, ICRS 2000.0) of Constellation Cassiopeia, the Lady of the Chair -- near Segin (Epsilon Cassiopeiae) and M103, northeast of Ruckbah (Delta Cassiopeiae) and the Double Cluster, and east of Navi (Gamma ...
from the Arabic meaning ‘stained hand', as the stars of Cassiopeia were thought by them to represent a hand stained with henna. Delta Cassiopeiae is named Ruchbah, from the Arabic for ‘knee', rukbat. The central star of the W, Gamma ...
 See also: Magnitude, Light, Light Year, Cassiopeia, Sky
  
|
RSS
