Ne X 12.134 Angstroms

Non-porous models - allowing q to be a free parameter

Here is the best-fit non-porous model shown already on the main page for this line. After that, we show results for the same model, but with q free.

Ne X 12.134: non-porous MEG
Ne X 12.134: non-porous HEG 		[12.03:12.18], λo = 12.1339
vinf=2250
β=1
powerlaw continuum, n=2; norm=1.64e-3
q=0
hinf=0
taustar=2.03   +/- (1.75:2.27)
uo=0.681   +/- (0.631:0.731)
norm=2.69e-4 +/- (2.62e-4:2.80e-4)
rejection probability = 63% (C=191.35; N=176)

That was for comparison. Here's the same model, but with q free:

Ne X 12.134: non-porous q-free MEG
Ne X 12.134: non-porous q-free HEG 		[12.03:12.18], λo = 12.1339
vinf=2250
β=1
powerlaw continuum, n=2; norm=1.64e-3
q=0.19   +/- (0.05:0.36)
hinf=0
taustar=2.19   +/- (1.89:2.50)
uo=0.650   +/- (0.601:0.703)
norm=2.65e-4 +/- (2.57e-4:2.76e-4)
rejection probability = 65% (C=189.47; N=176)

The fit is slightly better (ΔC=1.9) than the fit with q=0 frozen - q=0 is just outside the 68% confidence limit. The confidence range for taustar is slightly higher and uo slightly lower.

Here are the 68%, 90%, and 95% joint confidence limits on taustar and uo based on fitting the MEG and HEG data together. The asterisk represents the best-fit model, shown as the red histograms on the above two plots. The figure on the left is for the fit with q free and the one on the right is the one we've already shown, for q=0 frozen.

Ne X 12.134: joint uo taustar constraints using MEG+HEG data; q free Ne X 12.134: joint uo taustar constraints using MEG+HEG data

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last modified: 4 June 2008