Re: He I 2SP3 and neutral heavy ion fractions depend on assumed FeII atom
Hi Kirk,
I have posted three more plots. These are OTS_Fe_default.ps, OTS_Fe_99.ps, and
OTS_Fe_371.ps. The relative column densities of several neutral atoms are
plotted for two models: One with default OTS (dashed lines) and one with the 'no
lya OTS' command used. The three different plots are for three different iron
atoms; default, 99 levels, and 371 levels. I noticed when 'no lya OTS' is used,
all three iron atom models give very similar results.
Doug
--- In cloudy_simulations@yahoogroups.com, "doug_edmonds@..." <doug_edmonds@...>
wrote:
>
> Hi Gary,
>
> I have posted the plots you requested. They are Lya_Fe_default.ps,
Lya_Fe_99.ps, and Lya_Fe_371.ps.
>
> Cheers,
> Doug
>
> --- In cloudy_simulations@yahoogroups.com, "Gary J. Ferland" <gjferland@>
wrote:
> >
> > We might cut to the chase and look at the Lya destruction rates. This is
> > column 9 of the punch hydrogen lya command. What does Lya destruction vs
> > depth look like for the three different versions?
> >
>
Hi, Nahum Arav's grad student, Doug Edmonds, came across a problem as he tried to replicate the ionization structure of an AGN-photoionized cloud in Figure 8...
Hi Kirk, Why are you sure this is a problem? Keep in mind that the zones do not have fixed thickness and are likely to increase just past the ionization...
Hi Ryan, I am sorry I was not more clear on that issue. Depth space is indeed where we see the abrupt "cliff". Doug noticed the "problem" when he plotted the...
vertical cliff. I ran this exact model, and many others of differing parameters (density, U) using C06 and C07 and never encountered this cliff before. I can...
the 2 ^S density should, to some level of approximation, be given by a balance equation line equation 4 and 5 of ApJ 442, 714. it is proportional to the...
Hi Kirk and Doug, The proximate cause of the plummeting 2^3S population is photoionization by Ly alpha. You can see this by including the command "no OTS lya"...
Hi Ryan, Thanks very much for your suggestions. Yes, the results were converged in all of the models that we've run. Some, like the one we posted, had some...
Hi, The 3 recently posted postscript plots (Fe_16.ps, Fe_99.ps, Fe_371.ps) are the result of an experiment that I asked Doug to run. The input parameters are...
Hi Kirk and Doug, Thanks for checking into this. These are interesting results. It looks to me increasingly likely that the new line overlap treatment is ...
Hi Kirk, here are a few things that I think are happening. in its default state the code does FeII with the lowest 16 levels as in the real atom, then the...
Gary, I don't disagree with anything you wrote, but none of it explains the differences between C07 and C08. Kirk, does C07 show the slower depopulation for...
We might cut to the chase and look at the Lya destruction rates. This is column 9 of the punch hydrogen lya command. What does Lya destruction vs depth look...
Hi Kirk, I have posted three more plots. These are OTS_Fe_default.ps, OTS_Fe_99.ps, and OTS_Fe_371.ps. The relative column densities of several neutral atoms...
... Gary and Ryan, So if you've taken look at the 3 recent plots (Lya_Fe_xxx.ps) that Doug Edmonds has posted, there are enormous differences in the Lya ...
Ryan, To try to finish this off, I'll first say that C07 does indeed behave similarly to C08 in this regard. I made that statement re. C07 before I realized...
Hi Kirk, Thanks for clarifying this. I was becoming skeptical about the supposed C07/C08 differences but had not gotten around to a systematic test. I have...
Hi Kirk, Just to reiterate what Ryan said, there is nothing different between changing the default FeII atom to 20, 99, or 371 levels. The coding is exactly...
Hi Gary and Ryan, Thanks for your help and insight. I respond below to Gary's statements, with a remaining question at the end. ... Ok, yes, that's about what...
Hi Gary and Ryan, Let me go out on a limb and suggest a possible explanation for my question at the bottom of the post below. As I've written below, naively I...
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