Celestia Forums

I guess how a Hot Jupiter around a relatively low mass flare star (0.1 - 0.3 Solar masses) could appear. Assuming a low mass for the planet as well (0.05 - 0.3 Jupiter masses), how would it appear? Maybe dark grey with a reddish halo. But which changes could we see when star's flaring??

Presumably the temperature would go up during a flare event, which would presumably inflate the atmosphere and thus allow silicate and iron clouds to form higher in the atmosphere, or possibly prevent them forming at all.

I'd guess the planet would still be bluish despite the red dwarf producing less blue light, though it would help if someone could obtain RGB values from the spectra in this paper for Gliese 876 b and c, which are supposedly cloudless class III planets.

chaos syndrome wrote:Presumably the temperature would go up during a flare event, which would presumably inflate the atmosphere and thus allow silicate and iron clouds to form higher in the atmosphere, or possibly prevent them forming at all.

I'd guess the planet would still be bluish despite the red dwarf producing less blue light, though it would help if someone could obtain RGB values from the spectra in this paper for Gliese 876 b and c, which are supposedly cloudless class III planets.

Couldn't these world appear reddish? Or even dark grey?

Why should it be gray or reddish? An incandescent light bulb has a filament around 3000 K, which is a similar temperature to a star of spectral type M6-7V or so (according to this list). I personally have no problems seeing blue objects as blue under such lights.

chaos syndrome wrote:Why should it be gray or reddish? An incandescent light bulb has a filament around 3000 K, which is a similar temperature to a star of spectral type M6-7V or so (according to this list). I personally have no problems seeing blue objects as blue under such lights.

If it's so, right! When I hear "blue" I think about UV radiations, but in this case it's alright! Moreover I'm reading something about Rayleigh scattering and I'm understanding something...