Yellow supergiant
Encyclopedia
A yellow supergiant is a supergiant
star of spectral type F or G. These stars usually have masses between 15 and 20 solar masses. These stars, like any other supergiant,
are older and swing between blue and red phases depending on the chemical elements they consume in their cores. Until now it had been thought that few supergiants spend a long time in the transitional yellow phase. These systems may be the progenitors of rare supernovae linked to yellow supergiants. Only few such supernovae have been detected - most supergiants go supernova when at the blue (or hot) phase or red (or cool) phase.
Supergiant
Supergiants are among the most massive stars. They occupy the top region of the Hertzsprung-Russell diagram. In the Yerkes spectral classification, supergiants are class Ia or Ib . They typically have bolometric absolute magnitudes between -5 and -12...
star of spectral type F or G. These stars usually have masses between 15 and 20 solar masses. These stars, like any other supergiant,
are older and swing between blue and red phases depending on the chemical elements they consume in their cores. Until now it had been thought that few supergiants spend a long time in the transitional yellow phase. These systems may be the progenitors of rare supernovae linked to yellow supergiants. Only few such supernovae have been detected - most supergiants go supernova when at the blue (or hot) phase or red (or cool) phase.
See also
- Blue supergiantBlue supergiantBlue supergiants are supergiant stars of spectral type O or B.They are extremely hot and bright, with surface temperatures of 30,000-50,000 K. They typically have 10 to 50 solar masses on the Hertzsprung-Russell diagram, and can have radii up to about 25 solar radii...
- Red supergiantRed supergiantRed supergiants are supergiant stars of spectral type K or M. They are the largest stars in the universe in terms of volume, although they are not the most massive...
- SupergiantSupergiantSupergiants are among the most massive stars. They occupy the top region of the Hertzsprung-Russell diagram. In the Yerkes spectral classification, supergiants are class Ia or Ib . They typically have bolometric absolute magnitudes between -5 and -12...
- Red giantRed giantA red giant is a luminous giant star of low or intermediate mass in a late phase of stellar evolution. The outer atmosphere is inflated and tenuous, making the radius immense and the surface temperature low, somewhere from 5,000 K and lower...
- Blue giantBlue giantIn astronomy, a blue giant is a star with a spectral type of O or B and a luminosity class of III...
- HypergiantHypergiantA hypergiant is a star with a tremendous mass and luminosity, showing signs of a very high rate of mass loss.-Characteristics:...
- Yellow hypergiantYellow hypergiantGenerally speaking, a yellow hypergiant is a massive star with an extended atmosphere, which can be classified as spectral class from late A to K, with a mass of as much as 20-50 solar masses...