No. A blue dwarf is a theoretical class of star. The known blue stars are not blue dwarfs.
Dschubba is a binary star system with two stars: a blue star and a white dwarf star. The blue star is the primary star and the white dwarf is the secondary star.
Red Giants & Blue Giants & White Dwarf star
Blue dwarf diameter(sun=1)=4 times the sun's Blue dwarf mass(sun=1)=10 times sun's
The blue star gains a little more mass.
Blue dwarf diameter(sun=1)=4 times the sun's Blue dwarf mass(sun=1)=10 times sun's
Such a star, would be called a "white dwarf" star.
it is ether a white dwarf star or a polaris star
It is called a Black Dwarf
It is called a yellow dwarf.
Depending on the size of the blue-white star it may be a white dwarf, a main sequence or even a supergiant star.
The star with the highest surface temperature is the blue star called O-type stars. These stars can have surface temperatures exceeding 50,000 degrees Celsius.
Many stars are bigger than the sun. In fact the sun is called a yellow dwarf, or a G dwarf star meaning it is relatively small (i.e. a dwarf) compared to the "average star" in our galaxy.