Solakku: Difference between revisions
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= Composition = | = Composition = | ||
Solakku consists mainly of hydrogen and helium, though the composition is different between what is observable in the photosphere and what is present in the core. As it is already 77% through its total lifespan, Solakku’s core consists of 82% helium, with the remaining 18% being mostly hydrogen. | |||
The measured photosphere composition is 78.3% hydrogen and 19.1% helium. Metals account for the remaining 2.6%, most notably 0.25% iron and traces of Calcium. This is an unusual high metallicity for an A-type star, making it an Am-type [https://en.wikipedia.org/wiki/Chemically_peculiar_star chemically peculiar star]. | |||
This makes classification difficult. Visually, Solakku is an A8 star, but the calcium indicates A5 and the metallic lines F4, leading to its unusual spectral type kA5hA8mF4. | |||
= Solar radiation = | = Solar radiation = | ||
Revision as of 15:22, 26 May 2025
 Solakku, viewed through a solar filter | |
| Characteristics | |
|---|---|
| Evolutionary stage | Main Sequence |
| Spectral type | kA5hA8mF4 |
| B−V color index | 0.27 |
| Details | |
| Mass | 1.55 M☉ |
| Radius | 1.559 R☉ |
| Luminosity | 7.96 L☉ |
| Temperature | 7800 K |
| Metallicity [Fe/H] | 0.178 dex |
| Age | 2.6 billion years |
| Orbit | |
| Mean distance from Milky Way core | 8200 light-years |
| Galactic period | 45 million years |
| Velocity | 340 km/s about Galactic Center |
Solakku is the star at the centre of the avali home system. It is chemically peculiar and roughly classifiable as an A-type main-sequence star. It orbits the galactic enter at a distance of 8200 light-years on average and is approximately 6.4 astronomical units (960,000,000 km) away from Avalon. This corresponds to about 53 light-minutes.
Solakku forms a binary solar system together with its red dwarf companion Crest. Alone, Solakku contains 91.29% of the total mass of this system and together with Crest, the two stars hold 99.77% of the total mass.
Like other main-sequence stars, Solakku produces energy through nuclear fusion of Hydrogen into Helium and emits most of this energy through light, in its case mostly visible light and infrared.
Composition
Solakku consists mainly of hydrogen and helium, though the composition is different between what is observable in the photosphere and what is present in the core. As it is already 77% through its total lifespan, Solakku’s core consists of 82% helium, with the remaining 18% being mostly hydrogen.
The measured photosphere composition is 78.3% hydrogen and 19.1% helium. Metals account for the remaining 2.6%, most notably 0.25% iron and traces of Calcium. This is an unusual high metallicity for an A-type star, making it an Am-type chemically peculiar star. This makes classification difficult. Visually, Solakku is an A8 star, but the calcium indicates A5 and the metallic lines F4, leading to its unusual spectral type kA5hA8mF4.
Solar radiation
TODO: section on solar radiation: what wavelengths are emitted, how much energy, how much arrives on Avalon
TODO: section on solar activity, mainly flares
Life phases
Formation
Solakku formed approximately 2.6 billion years ago through gravitational collapse of a molecular cloud, beginning its life cycle. This occurred most likely at the same time as Crest’s formation, as they are projected to have very similar ages. However, Crest does not share Solakku’s chemical peculiarities, so the two stars may have formed in different regions of their molecular cloud. Another theory posits that Crest was captured by Solakku and the overlapping ages are merely a coincidence.
Main Sequence
TODO: mention age and how far it is into its main sequence
After hydrogen exhaustion
Location
TODO: section on location and celestial neighbourhood
Solar system
TODO: section on planetary system with relevant links to individual bodies
TODO: embed relevant links to wikipedia articles in text