Carbon Jovians?

I was thinking about an eerie object, maybe likely to orbit A-type stars and earlier spectral types.

Since Neptune-sized carbon planets have been inferred around stellar degenerates, silicate jovians have been confirmed (HD 189733 b) and chthonian planets exist, may carbon-based hot jupiters around hot stars exist?

There is a lack of close in exoplanets around these stars and such objects would show very low densities (I think, if I'm wrong, correct me) and bloated radii.
Who know? Several low-mass close binaries with very hot primary could turn out planetary systems.
Moreover I point out Beta Pictoris bears a carbon-rich disk and more massive stars may retain much greater amounts.
Jupiter-sized planets may accrete, migrate and turn hot-carbojupiters.
They could be named "Carbonados", after the charming smoked diamonds.

Suggestions?

It has actually been proposed that Jupiter may have grown around a carbon planet core. However the chemistry of giant planets is hydrogen dominated. Carbon in a giant planet is expected to be mainly in the form of carbon monoxide (which should dominate at high temperatures) or methane (dominant at cold temperatures). Presumably in a high C/O ratio planet, there'd be less oxygen to form carbon monoxide, but that's probably about it. I doubt whether there'd be much difference between a giant planet grown from a low C/O ratio environment and one grown in a high C/O ratio environment.

Alternatively if you form planets from material produced by disrupting a carbon/oxygen white dwarf, you could end up with planets made up of carbon monoxide and very little hydrogen whatsoever. Such planets would be found around degenerate stars.

So could carbon monoxide Jupiters be likely?
Specially in low mass cataclysmic variables?

I doubt a CV would be the right kind of environment to produce a carbon monoxide planet: in a CV, it is the normal star that is being disrupted, not the white dwarf.

But if a carbon monoxide planet comes from a degenerate white dwarf, it should be a stand alone object, not bound to any star, shouldn't it? Or not?