HR8799
catdynamics | March 11, 2013There were a number of interesting results reported today, the start of what promises to be an interesting week:
IR spectra of HR 8799 planets - Scharf at SciAm blogs reports on the Oppenheimer et al paper using the P1640 at the Palomar telescope.
Their interpretation of the rather low signal-to-noise low resolution spectra is that the outer two planets have little methane in their upper atmosphere and the inner planets do seem to have methane and that there is evidence for ammonia in the outer planets.
I suspect more data is needed.
HR8799 is an interesting system, I'm still not convinced…