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Quasi

Size comparison of a quasi-star compared to some stars.

A quasi-star, also known as a black hole star, is a hypothetical type of star where a star contains a black hole at its core. They are likely to have existed beginning of the history of a universe. They form when the core of a large protostar collapses into a black hole during its formation. After its formation, it will continue to generate a large amount of radiant energy from the infall of additional stellar material. They have temperatures of 4,000 K, but they can pertain much larger sizes than that of a hypergiant or supergiant, with lower estimates at approximately 10 billion km or 7,187 times that of the Sun, which beyond the Hayashi limit, which indicates 3.6 billion km or ~2,600 times the size of the sun based on the metallicity of the Milky Way. The maximum lifespan of a quasi-star is 7 million years, after which the core black hole would have reached 10,000 solar masses.


Stellar Classes
Φ · Ψ · Ω · Q · DE · GR · σ ς · Θ · N · D · BS · Y · T · L · M · C · S · QS · K · G · F · A · B · LBV · β · O · W · N · X · n0 · Exotic (Π · Σ · Γ · Δ · μ) · δ · I · TŻO · BL · ·
Theoretical Stars
Black dwarf · Exotic (Quark · Strange · Preon · Planck · Electroweak star) · Dark-matter star · Dark-energy star · Black star · Gravastar · Frozen star · Q star · Quasi-star · Thorne–Żytkow object · Iron star · Blitzar · Blue dwarf

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