ChromaStarAtlas

OpenStars approximate stellar atmosphere and spectrum synthesis modeling in Java.
User interface in JavaScript + HTML5. Hover for tips. Click for data coordinates. Ctrl +/- to zoom

Optional plots: Spectrum synthesis Atmosphere Chem Eq (if Atmos plots ON) Radiation field

Star inputs:

Surface temperature, T_surf
(3000 - 50000) K)

K
Log₁₀ surface gravity, log(g)
(0.0 - 5.5 cm s^-2 = dynes g^-1)

Mass
(0.1 - 20.0 M_Sun)

M_Sun
Metal content
(log₁₀ 0.001 - 10.0 x solar)

Microturbulence, ξ _T , (0.0 - 8.0 km s^-1)
κ_Fudge log₁₀ mass extinction (-2.0 - 2.0 log cm² g^-1)

Stellar outputs

Planetary inputs:

Affects Habitable zone and Transit light curve

Surface pressure
(0.6 - 22000 kPa)

kPa
Greenhouse effect, ΔT
(-200 - +600 K)

K
Albedo (0.0 - 0.95)

R_Orbit (AU) (0.01 - 50)

R_Planet (R_Earth) (0.1 - 20)

i_Rot (0 - 90 ^o)
Organic solvent
Water Methane Ammonia Carbon dioxide

Planetary outputs

Spectrum parameters

λ_Start (260 - λ_Stop nm)

λ_Stop (λ_Start - 2600 nm)

Labeled species

λ (270 - 2550 nm) σ (0.01 - 10 nm)

Detailed print-out (below graphs): None Spectrum synthesis Atmospheric structure Flux spectral energy distribution (SED) Specific intensity distribution Limb darkening coeffs Partial pressures A₁₂ abundances Transit light curves JSON string