Star magnetic field

[David Levy]

As a direct outcome from a message which had been forwarded by Airbrush

 

http://www.sciencefo...__fromsearch__1

 

I would like to verify the source of energy which generates the magnetic field in a star.

 

Therefore, let's look on the Earth magnetic field and try to verify the energy source of this field.

 

 

 

Earth's magnetic field

 

http://en.wikipedia.org/wiki/Earth's_magnetic_field

 

"Earth's magnetic field (also known as the geomagnetic field) isthe magnetic field that extends from the Earth's inner core to where it meets the solar wind,a stream of energetic particles emanating from the Sun

 

Unlike the field of a bar magnet, Earth'sfield changes over time because it is generated by the motion of molten iron alloys in the Earth's outer core (the geodynamo)."

 

The outer core

 

http://en.wikipedia....wiki/Outer_core

 

"The outer core of the Earth is a liquidlayer about 2,266 km (1,408 mi) thick composed of iron and nickel which lies above the Earth's solid inner core and below its mantle. Its outer boundary lies 2,890 km (1,800 mi) beneath the Earth's surface.

 

The temperature of the outer core rangesfrom 4400 °C in the outer regions to 6100 °C near the inner core. Because of its high temperature, modeling work has shown that the outer core is a low viscosityfluid (about ten times the viscosity of liquid metals at the surface) that convects turbulently.^[1] Eddycurrents in the nickel iron fluid of the outer core are believed to influence the Earth's magnetic field.

 

Without the outer core, life on Earth would be very different. Convection of liquid metals in the outer core creates the Earth's magnetic field"

 

 

 

So, the outer core generates the magnetic field.

 

What is the source of its energy? Why it is rotate? Why it keeps its high temperature for billions of years???

 

 

 

My reply would be as follow:

 

The Earth is located in its Tidal Habitable Zone.

 

http://www.astrobio....-habitable-zone

 

Hence, the Tidal generates the energy which is requested to the outer core keeping its momentum and high temperature.

 

Therefore, by moving out from the Tidal Habitable zone, a star might lose its magnetic field.

 

 

Do you agree?

Edited October 13, 2012 by David Levy

[Ophiolite]

Do you agree?

No. I disagree completely.

 

I would like to verify the source of energy which generates the magnetic field in a star.

 

Therefore, let's look on the Earth magnetic field and try to verify the energy source of this field.

The generation of stellar magnetic fields is different from that for planetary fields. Comparative studies of both may yield some interesting insights, but you cannot verify how one is generated by studying the other.

 

 

So, the outer core generates the magnetic field.

Correct for the Earth and probably for most or all planetary fields. But this tells us nothing about the generation of the stellar field.

 

What is the source of its energy? Why it is rotate? Why it keeps its high temperature for billions of years???

Temperatures have been falling for billions of years, which has led to solidification and growth of the inner core. Relatively high temperature is maintained because of slow conduction and convection of heat to the surface and the ongoing generation of heat by radioactive decay, primarily in the mantle.

 

My reply would be as follow:

 

The Earth is located in its Tidal Habitable Zone.

 

http://www.astrobio....-habitable-zone

 

Hence, the Tidal generates the energy which is requested to the outer core keeping its momentum and high temperature.

You have quite misunderstood this article. It relates to planets that might be orbiting very close to red dwarfs. Such planets would be influenced by tidal flexure (comparable with Io around Jupiter) which could maintain internal temperatures.

 

We can calculate the tidal stresses on the Earth (which come mainly from the moon) and they are irrelevant in terms of this mechanism. The Earth is too far away from the sun for this to be significant.

 

 

Therefore, by moving out from the Tidal Habitable zone, a star might lose its magnetic field.

This is gobbledegook. We've already established that a stars field is generated differently from a stellar field. But more to the point, how can a star move out of its own Tidal Habitable Zone, when it is the body responsible for generating that zone.

 

So, not only do I disagree completely and absolutely, but I urge you to abandon this self-contradictory, illogical mind-fart at once.

[David Levy]

To: Ophiolite

 

 

"You have quite misunderstood this article. It relates to planets that might be orbiting very close to red dwarfs.Such planets would be influenced by tidal flexure (comparable with Io around Jupiter) which could maintain internal temperatures."

 

Sorry. You have absolutely misunderstood the article.

 

It is stated very clearly: "But as planets get closer to their suns, the gravitational pull gets stronger, tidal forces increase and more energy is released. If Mars were to move closer to the sun, the sun's tidal tugs could possibly restart the tectonics, releasing gases from the core to provide more atmosphere".

 

 

 

Therefore, please don't even try to answer without reading carefully the article!!!

 

Hence, for next time I urge you to abandon this self-contradictory, illogical mind-fart at once.

 

 

Edited October 13, 2012 by David Levy

[Ophiolite]

That aspect of the article is irrelevant. Let's focus on just one point at a time.

 

How can a star move out of its own Tidal Habitable Zone, something you claim may occur.

[David Levy]

To: Ophiolite

 

"How can a star move out of its own Tidal Habitable Zone, something you claim may occur".

 

It's a theoretical research which was funded by NASA.

 

In this research they consider the impact of moving star from it's location.

 

Did you ever tried to read this article???

 

Please stop flooding nonsense!!!

Edited October 13, 2012 by David Levy

[Ophiolite]

I shall set aside the fact that a star's Tidal Habitable Zone really has no relevance for a G-type star like the sun (read the article).

 

A star's Tidal Habitable Zone is created by the star itself, so how do you propose you can move a star outside its own zone?

 

Let me make that clearer. If I move the star 5 AU in one direction its THZ has to move 5 AU in the same direction. There is simply no way the star can be moved outside its own zone.

Edited October 13, 2012 by Ophiolite

[David Levy]

To: Ophiolite

 

 

"There is simply no way the star can be moved outside its own zone".

 

 

 

Have you ever got a message that the moon is moving outwards from the Earth???

 

If yes, do you think that after billions of years it might move outside its current zone?

 

Anyhow, please stop your nonsense!!!

 

[Ophiolite]

You continue to miss the point that the THZ is generated by the star and therefore always moves with the star.

 

I ask that you now address this point specifically and properly.

 

I also request that you cease characterising my rational and relevant questions as nonsense. At present your proposal and your reactions to my questions are marking you as either exceedingly foolish or exceedingly ignorant. In my view such ignorance or stupidity has no place in this forum. Fail to start providing sensible responses to my reasonable questions and I shall seek to have you permanently banned.

[Cap'n Refsmmat]

David Levy, please stop being obnoxious to people trying to have a discussion with you. We don't tolerate this behavior here.

 

In any case, a star leaving its own tidal habitable zone is like the Earth escaping the Earth's own gravity. It doesn't make sense.

[John Cuthber]

To: Ophiolite

 

 

"There is simply no way the star can be moved outside its own zone".

 

 

 

Have you ever got a message that the moon is moving outwards from the Earth???

 

If yes, do you think that after billions of years it might move outside its current zone?

 

Anyhow, please stop your nonsense!!!

The moon will certainly move away from the earth- but the earth won't move away from itself.