Details of the WNE models (2016 version)

Note: This model grid, put online on 12-Sep-2016, replaces the previous version which, for reference, is still accessible by choosing "WNE-2013" in the drop-down menu. The major improvement of the 2016 version concerns the iron-group elements. The superlevels are now grouped by states of the same parity. This avoids the spurious emission from Fe III that had been present in the UV spectra of the coolest models in the previous version.

For the hotter part of the grid, ionisation stages of iron (and iron-group elements) up to Fe XVII are now taken into account.

Summary of the model atoms:

IonNo. of levels
He I 35
He II 26
He III 1
N II 1
N III 56
N IV 38
N V 20
IonNo. of levels
N VI 1
C II 3
C III 40
C IV 25
C V 1
G II
10
G III
131
IonNo. of levels
G IV 18
G V 22
G VI 29
G VII 19
G VIII 14
G IX 15
G X
128
IonNo. of levels
G XI
026
G XII
013
G XIII
015
G XIV
014
G XV
010
G XVI
09
G XVII
01

Notes: Element "G" stands for the generic iron-group element, which combines the elements from Sc to Ni in solar relative mixture. In case of the "G" element, the number of levels given in the above table actually refers to superlevels. If two entries are given for the same "G" ion, the first one refers to the cooler part of the model grid and the second entry to the hotter part (T* of 100 kK and higher).

For a couple of lines, contour plots of the equivalent width have been prepared. The contours are labeled with Wλ in Angstroem:

H α ps pdf png
H β ps pdf png
He I 5876 ps pdf png
He II 5412 ps pdf png
N III 4640 ps pdf png
N IV 4058 ps pdf png
N V 4604-4620 ps pdf png
N V 4933-4944 ps pdf png
C IV 5801-5812 ps pdf png


The following contour plot relates the stellar temperature T∗, which refers to the hydrostatic radius, to the "effective" temperature T2/3 referring to the radius of the optical depth 2/3. The contours are labeled with log T2/3 in Kelvin.
ps pdf png

The corresponding contour plots for the outdated 2013 version of the WNE grid can still be found here for reference.