Geologyhound wrote: My question is ... How does the wind move across the disc if it is heading in perpendicular directions?
It doesn't move across the disc. But at this stage, the disc itself is still diffuse, and is collecting material from the surrounding gas cloud. The T Tauri wind disrupts the overall cloud, which means it can have some effect on the dynamics of the accretion disc, as well.
Later, as nuclear fusion progresses and the modern solar wind pushes outward, does this wind also escape along the poles and then move in all directions or does it emanate spherically? Is it this solar wind that resists disc material from continuing to be gravitationally pulled in to the sun?
Once fusion begins, solar wind and solar radiation are essentially spherical (there are no polar jets), so the infall of material from the accretion disc stops, and the entire region begins to be cleared of gas and dust.
Which wind cleared out most of the dust?
Just the ordinary solar wind from a fusing star. (And there isn't much dust; mostly it is hydrogen that is blown away.)
[quote="Geologyhound"] My question is ... How does the wind move across the disc if it is heading in perpendicular directions? [/quote]
It doesn't move across the disc. But at this stage, the disc itself is still diffuse, and is collecting material from the surrounding gas cloud. The T Tauri wind disrupts the overall cloud, which means it can have some effect on the dynamics of the accretion disc, as well.
[quote]Later, as nuclear fusion progresses and the modern solar wind pushes outward, does this wind also escape along the poles and then move in all directions or does it emanate spherically? Is it this solar wind that resists disc material from continuing to be gravitationally pulled in to the sun?[/quote]
Once fusion begins, solar wind and solar radiation are essentially spherical (there are no polar jets), so the infall of material from the accretion disc stops, and the entire region begins to be cleared of gas and dust.
[quote]Which wind cleared out most of the dust?[/quote]
Just the ordinary solar wind from a fusing star. (And there isn't much dust; mostly it is hydrogen that is blown away.)