That might be a white dwarf.
I assume you mean a DWARF STAR. There are different types of dwarf stars; the white dwarfs are fairly hot - but the reason they are dim is that they have a very small surface area.
As the name white dwarf implies, this is a small type of star, and it has less surface area from which to radiate light, so even if it is hot, and giving off lots of light per square mile, there are fewer square miles than in larger, non-dwarf stars, so there is less total light being emitted.
north star
A star is a ball of gas that is very hot and very bright.
a white dwarf
White Dwarf Stars are very hot, like a ball of fire. They are dim because they are small and very far away.
I assume you mean a DWARF STAR. There are different types of dwarf stars; the white dwarfs are fairly hot - but the reason they are dim is that they have a very small surface area.
hot, bright stars
There could be many answers as dim and hot are mutually exclusiveBrightness (or dimness for that matter) is defined as a stars luminosity and it's distance from the observer.So a hot star could be very far away and appear dim, whereas if it was relatively close, it would appear bright.A hot but small star, would appear dim at a close distance.However, in all likelihood the answer you might be looking for is either:Neutron Star - Very small and very hotWhite Dwarf - Small and very hot
white dwarf
This could be a white dwarf. Its essentially a `dead star` as nuclear reactions no longer take place, but it remains very hot for millions of years from residue heat. They are very small though, compared with other stars or the size they used to be. If a hot bright star is very very far from earth then this also will appear dim from earth. It may have a low apparent magnitude (but a high absolute magnitude).
stars that are dim probably have both a small mass and a larger radius.
Proxima Centauri is a very dim red dwarf star, but it is the closest star to our own sun, at a distance of 4.2 light years.
As the name white dwarf implies, this is a small type of star, and it has less surface area from which to radiate light, so even if it is hot, and giving off lots of light per square mile, there are fewer square miles than in larger, non-dwarf stars, so there is less total light being emitted.
It is called a neutron star.
north star
They are very hot.