re: A Warm Saturn Around 51 Pegasi?
Could there be a 'warm' Titan in orbit around
such a [hitherto hypothetical] warm Saturn?
Well?....Such a warm Titan would lose
most of it's atmosphere over aeons, but....
If it could keep enough nitrogen to maintain an atmosphere
of over 100 millibars pressure,
then you could have large bodies of open liquid water;
even seas.
And evaporated water could be chemically
disassociated by UV radiation to allow free oxygen [O2]
to mix into the atmosphere; and to keep UV radiation
at safe levels near the surface, part of the O2 supply can be recombined
to form an ozone layer.