So as I mentioned in my previous question in the series, the parent red dwarf star of a one-planet system, Eridanus, has frozen over due to an unknown reason. By a "frozen red dwarf star", I mean, that the hydrogen and helium and other trace elements of the star have been frozen down to near CMB temperature. Literally "frozen". The red dwarf star is now just solid hydrogen and solid helium (formed by the crushing pressures inside the star), with lakes of liquid helium on the surface. The orbiting planet, Taurus, now witnesses a 10,000 year long era of freezing darkness. The inhabitants of the planet Taurus, the Villagers have to survive this eon. Characteristics of Eridanus pre-freeze:
Mass - 0.0898 M☉
Radius - 0.1192 R☉
Bolometric luminosity - 0.000553 L☉
Age - 6.8 BY
Temperature - 2600 K
Characteristics of Taurus:
Mass - 2.4 Earth masses
Radius - 9,780.83 KM
Gravity - 10 m/s2
Axial tilt - 19.8 degrees
Mean Temperature - 12.8°C
Day length - 23h 39min
Semi-Major axis - 3,200,000 KM
I cannot calculate the final size of the red dwarf as it contracts from the sudden cooling, as I am not a physics nerd, however, I can say with some certainty that the frozen star would be really, really small, somewhere along the size of Neptune, if my estimates are correct.
In my scenario, Eridanus, is not frozen forever. As is slowly contracts, it liberates heat from the compression of matter. Eventually after 10,000 years, Eridanus relights back into a full-fledged red dwarf star, bathing the planet Taurus, and its inhabitants, the Villagers, with warmth and sunlight.
However, certain comments say the exact opposite. The red dwarf would basically supernova. The reason is that, because I cooled the star too quickly, the star just collapses at a fraction of lightspeed and rebounds back from the shockwaves and explodes into a supernova. The supernova, then rips apart the orbiting planet, Taurus, into dust, incinerating the Villagers. The Villagers have barely enough time to register any decrease in output, before they are ripped apart by the supernova
Basically, instead of witnessing a dark 10,000 year long freezing night, the Villagers instead witness a blinding flash of light in the sky, as the star collapsed from the freeze, and soon be incinerated. Again, I cannot calculate the brightness of a red dwarf going supernova from just freezing it, however if a certain XKCD article describes the Sun going supernova at 1 AU would be a billion times brighter than the Tsar Bomba detonating against your eyeball, Taurus being located just 3.2 million km from Eridanus, would most likely witness a similar apparent brightness.
Basically, I cannot figure out how, a red dwarf can go supernova from just cooling it down, so here I come up with this question:
Would a Red dwarf star actually go supernova from just cooling it down to near absolute zero suddenly?
(P.S Nevermind how the star cooled down so quickly. I will handwave away the issue of how I cooled a star so quickly, because for now, I am focused on the question on how a star can explode from just cooling down)
EDIT 1: To fraxinus:
The habitable zone of a red dwarf is a tidal nightmare. Your planet will not rotate for long.
As I described in a previous question (the First question in the series, in fact), Taurus is not tidally locked to Eridanus. Since I haven't found any papers about the possibility of non-tidally locked rotating planets around red dwarfs, for now, I'll just handwave tidal locking for now.