#
HD93129: *Chandra* grating spectrum

## Alternate wind parameters

### 9.1687, 9.2297, 9.3143 Angstroms: Mg XI

##
v_{inf} = 3200

β = 1.0

MEG
HEG |
[9.04:9.43], λ_{o} = 9.1687, 9.2297, 9.3143
v _{inf}=3200
β=1 powerlaw continuum, n=2; norm=2.05e-4
q=0
h_{inf}=0
taustar=1.97 +/- (0.91:4.37)
0.37:5.38 at 90% confidence R_{o}=2.41 +/- (1.01:3.71)G=0.37 +/- (0.22:0.63)φ-ratio = 147 norm=1.58e-5 +/- (1.45e-5:1.72e-5)
rejection probability = ???% (C=412.14; N=464) fit log |

Here are the 68%, 90%, and 95% joint confidence limits on taustar and *R*_{o}. The filled circle represents the best-fit model, shown as the red histograms on the above plots.

Note that the best-fit point is actually a bit off the top of the contour plot.

Note also that the best-fit G value is pretty small. Here's a fit for which we froze G at 0.71, the value expected from atomic physics at the temperature of peak emissivity. (If anything, real, high S/N data tend to show somewhat *higher* values than this.)

*last modified*: 30 January 2011