Search results
Results from the WOW.Com Content Network
Yellow supergiants generally have spectral types of F and G, although sometimes late A or early K stars are included. [1] [2] [3] These spectral types are characterised by hydrogen lines that are very strong in class A, weakening through F and G until they are very weak or absent in class K. Calcium H and K lines are present in late A spectra, but stronger in class F, and strongest in class G ...
In 1983, Olin J. Eggen reported that HD 271182 was a pseudo-Cepheid variable, [17] a supergiant in the Hertzsprung gap with less periodic light variations than true Cepheids. [18] This star in particular showed an amplitude of 0.25 mag in the V band. Similarities were noted between it and two other pseudo-Cepheids, namely R Puppis and HD 269879 ...
Intrinsic variable types in the Hertzsprung–Russell diagram showing the Yellow Hypergiants above (i.e. more luminous than) the Cepheid instability strip. A yellow hypergiant (YHG) is a massive star with an extended atmosphere, a spectral class from A to K, and, starting with an initial mass of about 20–60 solar masses, has lost as much as half that mass.
The yellow hypergiants are thought to be generally post-red supergiant stars that have already lost most of their atmospheres and hydrogen. A few more stable high mass yellow supergiants with approximately the same luminosity are known and thought to be evolving towards the red supergiant phase, but these are rare as this is expected to be a ...
HR 5171, also known as V766 Centauri, is a yellow hypergiant in the constellation Centaurus. It is said to be either an extreme red supergiant (RSG) or recent post-red supergiant (Post-RSG) yellow hypergiant (YHG), both of which suggest it is one of the largest known stars. The star's diameter is uncertain but likely to be between 1,100 and ...
9 Pegasi (9 Peg) is a supergiant star in the constellation Pegasus. Its apparent magnitude is 4.35. 9 Pegasi is defined and used as an MK standard star for the spectral type G5 Ib. [8] [9] It is a yellow supergiant nearly two thousand times more luminous than the sun and sixty times
Brittany Flores speaks to first grade son Rey Flores Jr. about his science fair project at Miller High School on Friday, Jan. 19, 2024, in Corpus Christi, Texas. Father Rey Flores stands in the ...
V810 Centauri is a double star consisting of a yellow hypergiant [3] primary (V810 Cen A) and blue giant secondary (V810 Cen B). It is a small amplitude variable star, entirely due to the supergiant primary which is visually over three magnitudes (about 12x) brighter than the secondary. [7]