Stellar Atmosphere Models

---

** News **

2020 September: A significant upgrade to Sterne occured during July 2020 when the possibility to specify the overall composition with more elements was included. At the same time, the code now conserves mass fraction of metals rather than number fractions for mixtures where the hydrogen:helium ratio is changed. To accommodate both changes, all the grids are being recomputedi, starting with models having microturbulent velocity = 0. Models having v_turb=5 and 10 km s^-1 and also carbon- and nitorgen-enriched mixtures will follow.

---

Grids are organized by composition - H-nn-He-mm--zzz-
-nn-: Hydrogen fraction (per cent)
-mm-: Helium fraction (per cent)
-zzz-: Metallicity label

Each tarball contains a grid organized by effective temperature and surface gravity
Model names are constructed as - t-ttt-g-ggg--zzz-???
-ttt-: Effective temperature in defgrees K / 100
-ggg-: Surface gravity in log ( g / cm s^-2 ) * 100
-zzz-: Metallicity label
-vv- : microturbulent velocity in km/

For each model, there are several files
-model-.q: Model structure in dense 'QUB' format
-model-.s: Emergent flux at low resolution
-model-.MODEL: Model structure in extended format (under development)A
-model--wl-v-vv-.000: Emergent flux, continuum flux, etc at high resolution for given wavelength range
-model--wl-v-vv-.001: Normalized flux at high resolution for given wavelength range

More information is given in the LTECODES web pages
These are very large files: download only if necessary

Sterne4: 2020

v_turb=0 km s^-1

							c01	c01	c003
h--he---	m99	m20	m10	p00	sdb	hiz	p00	m05	m05
h100he00		h100he00_m20	h100he00_m10	h100he00_p00	h100he00_sdb
h99he01	h99he01_m99			h99he01_p00
h90he10	h90he10_m99	h90he10_m20	h90he10_m10	h90he10_p00	h90he10_sdb
h80he20
h70he30		h70he30_m20	h70he30_m10	h70he30_p00	h70he30_sdb
h50he50	h50he50_m99	h50he50_m20	h50he50_m10	h50he50_p00	h50he50_sdb
h30he70		h30he70_m20	h30he70_m10	h30he70_p00	h30he70_sdb
h20he80
h10he90	h10he90_m99	h10he90_m20	h10he90_m10	h10he90_p00	h10he90_sdb
h05he95		h05he95_m20	h05he95_m10	h05he95_p00	h05he95_sdb
h01he99	h01he99_m99	h01he99_m20	h01he99_m10	h01he99_p00
h00he100		h00he100_m20	h00he100_m10	h00he100_m10

v_turb=5 km s^-1

							c01	c01	c003
h--he---	m99	m20	m10	p00	sdb	hiz	p00	m05	m05
h100he00				h100he00_p00
h99he01				h99he01_p00
h90he10				h90he10_p00
h80he20
h70he30				h70he30_p00
h50he50				h50he50_p00
h30he70				h30he70_p00
h20he80
h10he90				h10he90_p00				h10he90_c01m05	h10he90_c003m05
h05he95				h05he95_p00				h05he95_c01m05	h05he95_c003m05
h01he99				h01he99_p00				h01he99_c01m05	h01he99_c003m05
h00he100				h00he100_p00				h00he100_c01m05	h00he100_c003m05

Sterne3: 2019

h--he---	m20	m10	p00	sdb	hiz
h100he00	h100he00_m20	h100he00_m10	h100he00_p00	h100he00_sdb
h99he01			h99he01_p00	h99he01_sdb
h90he10	h90he10_m20	h90he10_m10	h90he10_p00	h90he10_sdb	h90he10_hiz
h80he20			h80he20_p00	h80he20_sdb	h80he20_hiz
h70he30	h70he30_m20	h70he30_m10		h70he30_sdb	h70he30_hiz
h50he50	h50he50_m20	h50he50_m10		h50he50_sdb	h50he50_hiz
h30he70	h30he70_m20	h30he70_m10		h30he70_sdb	h30he70_hiz
h20he80		h20he80_m10
h10he90	h10he90_m20	h10he90_m10		h10he90_sdb
h05he95	h05he95_m20	h05he95_m10		h05he95_sdb
h01he99	h01he99_m20	h01he99_m10
h00he100	h00he100_m20	h00he100_m10