The ultracool helium-atmosphere white dwarf companion of PSR J0740+6620?

D. M. Beronya, A. V. Karpova, A. Yu. Kirichenko +4

We report the detection of the likely companion of the binary millisecond pulsar J0740+6620 with the Gran Telescopio Canarias in the $r^{\prime }$ and $i^{\prime }$ bands. The position of the detect…