From: Greg Aldering (aldering@panisse.lbl.gov)
Date: Wed Jun 01 2005 - 17:06:48 PDT
Hi Gabriele,
On the flight back from Paris I read your evolution paper. Attached is
a
PDF of the scanned marked-up paper. I didn't see any fundamental
problems,
but as you will see there are a few things which I think should be
clarified.
A few high-level items:
a) In places where you say you don't find evidence for X you should
also provide some indication of how sensitive your test is to X.
This shouldn't be much of a problem, since you have some reasonable
level of sensitivity for many of the measurements.
b) I know that equivalent widths for monochromatic emission
lines require a correction of (1+z) in going from observer frame to
restframe. Since these features are not monochromatic I guess they
don't need this correction so you can ignore my comment about
this.
c) In figure 2 I noticed that SN2005fd is much redder than the other
SNe - is that correct and do you understand why?
d) When you say that higher redshift SN should exist in lower
metallicity environments, you are repeating a common misperception.
While this may be roughly true for the ensemble of SNe, for
any given SN this can't be said. Moreover, over the redshift
interval these data explore, the effect is should be quite small for
most SN since most star formation occured at z > 1. I have uggested
that you rephrase this to indicate that some high redshift SN might
be in lower-metallicity environments.
Cheers,
Greg
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