Q-star

Not to be confused with Quark star.

Q-Star
A Q-Star
Diameter	5-10 kilometers
Temperature	N/A
Mass	2-3 M☉
Spectral Type	θ
Apparent Magnitude	N/A
Gravity	2*1018 m/s2
Elements	Exotic Quark Plasma

A Q-star, also known as a Grey hole, is a hypothetical type of a compact, heavy Neutron star with an exotic state of matter. Such a star can be smaller than the progenitor star's Schwarzschild radius and have a gravitational pull so strong that some, but not all light, cannot escape. The Q stands for a conserved particle number. A Q-Star may be mistaken for a stellar Black hole. A Grey hole is between a Black hole and a White hole.

Note: A Q-Star and a Quark star are NOT the same.

Types

Here is a list of types.

• SUSY Q-ball
• B-ball, stable Q-balls with a large baryon number B. They may exist in neutron stars that have absorbed Q-ball(s).