Metallicity¶
Notebooks¶
Overview¶
pyigm contains (or will contain) a set of classes and methods to enable analysis of the metallicity of gas in the IGM/CGM.
MetallicityPDF¶
The MetallicityPDF Class holds the PDF of metallicity values for a system (which need not be specified). By default, the analysis is performed in log10 space. Here is a simple instantiation:
ZH = np.linspace(-5, 0., 25)
pdf = np.exp(-(ZH+1.5)**2/0.2**2)
# Class
mpdf = MetallicityPDF(ZH, pdf)
# Mean
print('Mean of the PDF is {:g}'.format(mpdf.meanZH))
Attributes/Properties¶
| Variable | Type | Description |
|---|---|---|
| meanZH | float | Weighted Mean of [Z/H] |
| medianZH | float | Median of the cumulative PDF (log space) |
Methods¶
One can calculate the bounds of a confidence interval with:
mpdf.confidence_limits(0.68)
One can combine two MetallicityPDF’s with math. The resultant PDF is not normalized.:
sum_pdf = mpdf + mpdf2
sum_pdf.normalize()