In article ,
jacobnavia writes:
http://www.eso.org/public/archives/r...5/eso1545a.pdf
That article says (page 16)
"Our results indicate that some very massive galaxies are
present since the universe was only a billion years old."

The milky way is more than 10Gy old. How a galaxy TWICE AS MASSIVE can
appear in just 945My (z=6) ??

What the article actually says is that such galaxies appear in
significant numbers between z = 5 and 6.

At lower redshifts, more massive galaxies form faster than less
massive galaxies. Why is it surprising that the same thing is found
at z 5?

And the authors say that many more galaxies even more massive are
lurking behind, obscured by dust.

If so, I missed that. The observations can't rule out such galaxies,
but where does the paper say they exist?

This confirms what I have reported
here in a previous discussion: the sea of galaxies waiting for us behind
the farthest galaxies that we can see now.

Did you look at the space density plots (Figs 8 and 13)? Why do you
think there are more galaxies at higher redshifts? Of course there
are some (as reported in other papers), but so far the masses and
space densities at z6 are much lower than at 5z6.

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