A star that dims every three days would likely be a binary star system. Such a system consists of two stars that orbit their mutual center of mass. If their orientation is right then, from out perspective, one star will periodically block the other from view, reducing the amount of light we see from them.
a white dwarf
no
I would consider 3 days the maximum for dim sum.
to marry them
No; actually, white dwarves are rather dim.
That might be a white dwarf.
hot, bright stars
Your battery is weak, or your your alternator is not charging battery.
The closest known Star to our sun is Proxima Centauri, a small dim red dwarf star around 4.2 light years away.
A Black star, or a dwarf star is commonly refered to as a star that is 'fading'. In fact, the star is starting to burn out as stars are like the sun, only smaller. They are small burning balls of gas.
you might have a short in your alternator. In my car the headlights would dim when I put on the brakes or tried to use cigerette lighter to power up my phone.
the planet makes a dim in the light given star