Zeeman splitting (broadening?)

[ajwheeler]

This is experimental and may not every be merged. I want to get it to the point where it's producing correct spectra, but I may not every make the interface/performance good.

[github-actions]

TODOs and @show instances found in this PR:

src/line_absorption.jl:111:                        # TODO upper or lower E
src/line_absorption.jl-112-                        Δλ_zeeman .= @. line.wl^2 / (c_cgs * hplanck_cgs) * ΔE_zeeman
src/line_absorption.jl-113-                        ∂λ_∂E = -line.wl^2 / (c_cgs * hplanck_cgs)
src/line_absorption.jl-114-                        Δλ_zeeman = ∂λ_∂E .* ΔE_zeeman
--
src/line_absorption.jl:122:                for shift in (-Δλ_zeeman, 0, Δλ_zeeman) # TODO selection rules
src/line_absorption.jl-123-                    λ = @. line.wl + shift
src/line_absorption.jl-124-
src/line_absorption.jl-125-                    # calculate the window center from the nominal line center, not the shifted line
--
src/line_absorption.jl:135:                    # TODO selection rules scaling
src/line_absorption.jl-136-                    α_task[:, lb:ub] .+= line_profile.(λ, σ, γ, amplitude, view(λs, lb:ub)')
src/line_absorption.jl-137-                end
src/line_absorption.jl-138-            end
--
src/linelist.jl:17:    # TODO
src/linelist.jl-18-    lande_g_even # Landé g factor for even level
src/linelist.jl-19-    lande_g_odd  # Landé g factor for odd level
src/linelist.jl-20-    J_even
--
src/linelist.jl:403:        # TODO make this more robust!  I think this was the problem!
src/linelist.jl-404-        if length(row) == 159
src/linelist.jl-405-            row = " " * row
src/linelist.jl-406-        end
--
src/linelist.jl:415:        # TODO I HAD TO EDIT gf0640.10 !!!
src/linelist.jl-416-        # I inserted a space at the begining of every line to make it match the spec
src/linelist.jl-417-
src/linelist.jl-418-        # Parse lande g factors (columns 28 and 29, chars 141:145 and 146:150)

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	main	5ba957f...	main / 5ba957f...
synthesis/M dwarf/100 Å of APOGEE w/ water	7.53 ± 0.029 s	20.1 ± 0.0027 s	0.375 ± 0.0014
synthesis/M dwarf/4000 Å - 8000 Å VALD solar	12.4 ± 0.037 s	25.7 ± 0.056 s	0.484 ± 0.0018
synthesis/M dwarf/APOGEE DR17 w/o water	9.48 ± 0.076 s	21.2 ± 0.021 s	0.447 ± 0.0036
synthesis/M dwarf/one wavelength	0.306 ± 0.00066 s	0.31 ± 0.0014 s	0.984 ± 0.0051
synthesis/sun/100 Å of APOGEE w/ water	0.85 ± 0.0017 s	1.17 ± 0.0033 s	0.727 ± 0.0025
synthesis/sun/4000 Å - 8000 Å VALD solar	5.58 ± 0.012 s	8.54 ± 0.042 s	0.653 ± 0.0036
synthesis/sun/APOGEE DR17 w/o water	4.85 ± 0.021 s	9.19 ± 0.034 s	0.528 ± 0.003
synthesis/sun/one wavelength	0.118 ± 0.00056 s	0.119 ± 0.00043 s	0.993 ± 0.0059
time_to_load	2.63 ± 0.01 s	2.82 ± 0.11 s	0.932 ± 0.035

Memory benchmarks

	main	5ba957f...	main / 5ba957f...
synthesis/M dwarf/100 Å of APOGEE w/ water	1.73 M allocs: 3.21 GB	3.34 M allocs: 9.14 GB	0.351
synthesis/M dwarf/4000 Å - 8000 Å VALD solar	8.62 M allocs: 7.11 GB	8.88 M allocs: 15.8 GB	0.45
synthesis/M dwarf/APOGEE DR17 w/o water	5.6 M allocs: 5.11 GB	6.47 M allocs: 12.4 GB	0.412
synthesis/M dwarf/one wavelength	1.15 M allocs: 0.288 GB	1.15 M allocs: 0.289 GB	0.997
synthesis/sun/100 Å of APOGEE w/ water	1.17 M allocs: 0.226 GB	2.18 M allocs: 0.516 GB	0.439
synthesis/sun/4000 Å - 8000 Å VALD solar	8.48 M allocs: 2.81 GB	8.73 M allocs: 4.59 GB	0.612
synthesis/sun/APOGEE DR17 w/o water	5.29 M allocs: 2.12 GB	6.21 M allocs: 4.45 GB	0.477
synthesis/sun/one wavelength	0.782 M allocs: 0.107 GB	0.785 M allocs: 0.108 GB	0.994
time_to_load	0.159 k allocs: 11.2 kB	0.159 k allocs: 11.2 kB	1