Oddly, I don't see how they got to those distances.Many thanks Helio, for those calculations.
Looking at #18, and this is a key whether or not it needs slight modification, it seems that at least Jupiter would be in the HZ. There is some variation, but the highest figure I have seen (above) for our Sun is 2AU diameter; thus 1 AU would have the Sun just reaching Earth (current) orbit.
Ok, now I'm not so confident. Sorry Pogo.I'm confident they aren't.
Given high surface temperatures, a lot of compounds will become a gas, thus these would add to them atmospher.I see that "hot jupiters" (small j) may be unlike our Jupiter, in that they they do not necessarily depend so heavy on H and He. How important do you think this might be?
Yep. But its escape velocity is more than 10x that of Jupiter.Helio, yes, I understand H and He should dominate statistically, but there are suggestions of more exotic atmospheres. I also understand that the Sun consists mainly of H and He, that it is very hot, and that it is surrounded by a (good) partial vacuum - yet it retains its H/He because of gravity.
Yep, gravity is the only thing holding it and Fig. 3 does a nice job comparing the planet's values.So Jupiter is no longer verging on becoming a star, but the same principles must apply - making due allowance for Jupiter's lower gravity. I think Fig. 3 gives some clues.
Can you convert that curve to Texan? Is the y-axis a decimal amount of the escape velocity?Helio, if we check it out, I guess that will probably show up in a distribution curve.
Looks like 1/6 is where the normal curve gets steep - or is it just my coloured spectacles?