Both. A subgiant can be a young star (1,000 years old) to an old star (10 billion years old).
See related question.
Considering a neutron star is about the size of a city, a subgiant is way bigger.
Considering neutron stars are about the size of a city, sub giants are much bigger
A protostar has 100% Hydrogen. A young star has a Helium core.
It may be either. Juvenile means young.
How old a star is.
Considering a neutron star is about the size of a city, a subgiant is way bigger.
white subgiant star
very
A binary star. The main component is a Be-type subgiant.
Considering neutron stars are about the size of a city, sub giants are much bigger
A subgiant is a class of star that is brighter than most normal dwarf main sequence stars but not bright enough to be classed as a giant.Eg. Procyon (α CMi / α Canis Minoris / Alpha Canis Minoris)
If you are referring to the Yerkes spectral classification, a Class IV star is known as a subgiant.
In star lives, there are no old blue stars. All blues stars are young.
neutron star is a stellar remnant so it is neither a young star nor an old star . It is formed by the gravitational collapse of massive star and are composed of neutrons . neutron star has a mass in between 1.35 to 2 solar masses
in star life cycle terms its pretty young
neutron star is a stellar remnant so it is neither a young star nor an old star . It is formed by the gravitational collapse of massive star and are composed of neutrons . neutron star has a mass in between 1.35 to 2 solar masses
You would expect to find them in both.