Stellar Winds

This post is mainly intended to support my contemplation.

Theoretically, winds can't be isothermal throughout the space. It will cool and condense to other matters. Dusts ramp into ISM and gas and and finally drag force win radiation force (hypothesis) then lost its momentum quickly. Then driven force on gas vanishes.

Blue: Isothermal continuous dust driven wind. Driven force applied to everywhere.

Yellow: Isothermal continuous dust driven wind with driven force turned on at certain radius (0.8 numerically) and extend to infinity.

Green: Non-isothermal continuous dust driven wind with drive force turned on at 0.8 and extend to infinity.

Red: Non-isothermal continuous dust driven wind with drive force turned on at 0.8 and turned off at r=5.

Blue and yellow line coincide at large radius. Here is the enlarged [0,5] radius.

Potential I used: driven force turned on at 0.8 and off at 5.

Temperature profile I used: for non-isothermal case.

Conclusion: Wind material can fall back as shown by red line. Its velocity will converge to 0 (solution blow up at this point) and physically start to fall back. We can guess it will fall back to the outer potential well and stay there. To push one step further, materials will condense there and forming rocks, asteroids and so on?

Attachments (4)

Download all attachments as: .zip

Comments

No comments.