9_-_Stellar_Structure_2

# 9_-_Stellar_Structure_2 - 9 – Stellar Structure#2 George...

This preview shows pages 1–3. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 9 – Stellar Structure #2 George Gamow Ray Davis 2 The Plan • Combine the parts from last time to calculate the Luminosity. • Radiative transport • Nuclear Reactions 3 One-Dimensional Radiative Transfer T+ ∆ T T A ∆ L τ = ∆ L / n σ = 1 This condition puts the lower box with the upper one. ( ) ( ) 4 4 3 3 3 Q is the net upward heat flux Expand the first term to 4 4 ( 1 ) Δ is the distance for 1 Δ (2) Combining 1 and 2 1 4 Q A T T T Q A T T dT Q A T l dl l l dT Q A T dl σ σ σ κρ σ κρ Δ Δ = + Δ − Δ = Δ Δ = Δ = Δ = 4 Luminosity 3 2 3 4 2 3 4 3 1 4 1 L R 1 L R dT Q A T dl T T R GM T KR GM M KR R R G L M K σ κρ σ κρ μ μ σ κ σ μ κ Δ = ≈ = ⎛ ⎞ ≈ ⎜ ⎟ ⎝ ⎠ ⎛ ⎞ ≈ ⎜ ⎟ ⎝ ⎠ κ = 0.39 cm 2 /g 5 • Using and we plug-in the constants, the answer is L ~ 3x10 34 erg/s. The measured value is 4x10 33 erg/s. • We are a bit lucky! However, it says we’re near the right track....
View Full Document

{[ snackBarMessage ]}

### Page1 / 5

9_-_Stellar_Structure_2 - 9 – Stellar Structure#2 George...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online