Respuesta :
the bigger the size the more easier to see from a distance and the smaller the harder to see
The lack of fusion taking place inside a white dwarf is the main factor affecting its visual luminosity.
What is a white dwarf?
They are the burned and collapsed core remains of stars. They are formed from the stars which have a low mass. They are classified as one of the dimmest objects that can be observed in the universe.
Their mass is comparable to the mass of the sun and the volume is comparable to the mass of the earth.
The temperature of a white dwarf is extremely high, i.e 25,000 K. Its luminosity is low because of its small size.
White dwarfs that are close to the surface of the earth can be observed through some very powerful telescopes but they are extremely faint.
Since white dwarfs are formed from the dead remains of stars, their luminosity is from the residual thermal energy and not from any kind of fusion taking place inside a white dwarf.
Therefore, the factor affecting the luminosity of a white dwarf is the lack of fusion inside the surface of the white dwarf.
Read more about white dwarfs, here
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