This is an offshoot of my ATM ideas for anyone
who remembers but it is mainstream stuff and I
think justified in this forum. I have been
wondering for a while if white dwarfs near
ordinary mainstream stars are absorbing much
energy from the neutrino wind passing through
from the nuclear reactions in the star. I tend
to think that the density of matter in white
dwarfs coupled with the energy gain in falling
onto these stars means that a not insignificant
number of neutrinos react inside the dwarf
releasing energy that has to difuse out along
with the original energy the dwarf started
with. The end question here is has it been
determined that such dwarfs appear brighter
than isolated white dwarfs?

The maths involved is way beyond my ken, books
on "radiation transport" are dense with
equations. I just point out the possibilities.

There seem two basic mechanisms, neutrinos
hitting electrons giving off photons and
nuclear reactions with nuclei of atoms. I
tried google for any hint of any historical
investigations but found nothing.

One very interesting possibility is the exit
of neutrinos from the far side of the dwarf.
Any radiation generated here is free to
escape. And it will be relativistically focused
in the direction the neutrinos were going.
Those that passed through a thin chord at the
side of the dwarf will have to climb out the
gravitational field and will be deflected
sideways. And the neutrinos are not all from
the exact centre of the main star. So the weak
beam is not too narrow.

So I wonder if x-ray transients that have
symmetrical rise and fall profiles are
routinely observed? This is a possible model I
think. Is it original?