On Fri, 20 Jul 2012, Andrzej Marecki wrote:
Can a grand-design *spiral* galaxy be located at a redshift z=2.18? Yes it can!
http://www.nature.com/nature/journal/v487/n7407/full/nature11256.html
Cool!
for z in 10 2.18; do echo $z |cosmdist -v -h 100 -m 0.28 -l 0.733 -t; done
Enter redshift: read parameter: 10.00000 H_0= 100.00 Omega_matter= 0.28000 Omega_lambda= 0.73300 Omega_radiation = 0.00004950 w_0= -1.00000 cosmological time is 0.337055523 Gyr Enter redshift: read parameter: 2.18000 H_0= 100.00 Omega_matter= 0.28000 Omega_lambda= 0.73300 Omega_radiation = 0.00004950 w_0= -1.00000 cosmological time is 2.151303965 Gyr
So if the galaxy "formed" at z=10, then it had only about 1.8 h^-1 Gyr to build up to the massive disk, according to an FLRW model with Concordance parameters.
-- am
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