I Mars Magnetosphere: New Research on Solar Wind Induced Shielding

[vin300]

According to recent research news, swedish PhD scholars have said that solar wind induces currents in the ionosphere of mars. This causes an induced magnetoshere which in turn protects the atmosphere from the same wind. This is quite difficult to believe. It is well known that Mars does not really have a magnetosphere.
What extra conditions must be satisfied so that a rotating core can induce magnetic shielding around a planet?

 

[rootone]

It would help if you give a link to the said research.

 

[davenn]

According to recent research news, swedish PhD scholars have said that solar wind induces currents in the ionosphere of mars.

It would help if you give a link to the said research.

agreed

and I doubt this thread should have been an A tag

 

[fresh_42]

... and I doubt this thread should have been an A tag

I set it on "I". However, without a proper source and the knowledge of the calculations done by this unnamed Swedish physicist, it is really hard to tell. How do I know what I want to say before I hear what I've said?

 

[mfb]

Are you sure this was not Venus?

 

[vin300]

I read it from another source, but here is the university link:
http://umu.diva-portal.org/smash/record.jsf?pid=diva2:1157328&dswid=-9328
Venus also has a problem with magnetosphere, but this was mars

 

[davenn]

According to recent research news, swedish PhD scholars have said that solar wind induces currents in the ionosphere of mars. This causes an induced magnetoshere which in turn protects the atmosphere from the same wind. This is quite difficult to believe. It is well known that Mars does not really have a magnetosphere.
What extra conditions must be satisfied so that a rotating core can induce magnetic shielding around a planet?

OK, you seem not to have read/understood the text correctly
It didn't say that Mars has a natural magnetic field as Earth does and this is what you are implying. It has Solar Wind INDUCED fields.

so there is nothing "difficult to believe" as you stated, there is no contradiction

Dave

 

[vin300]

I meant that the ability of solar wind induced fields to have the effect of the same magnitude as that of entire rotating core is what is indigestible

 

[davenn]

I meant that the ability of solar wind induced fields to have the effect of the same magnitude as that of entire rotating core is what is indigestible

and where does it state that ?

it doesn't !

 

[Beaugeard F]

I know nothing about this solar wind maybe inducing magnetic field on Mars.
But to (trying) respond to the last part of your question: Is it possible (theory and faisable?) to set a metallic magnet on one of the moon of Mars and by the simultaneous rotations to create a dynamo effect, then a magnetic field (to protect the atmosphere)?

 

[davenn]

Welcome to PF

Is it possible (theory and faisable?) to set a metallic magnet on one of the moon of Mars and by the simultaneous rotations to create a dynamo effect, then a magnetic field (to protect the atmosphere)?

I'm not sure how you expected that to work ?
a magnet on one of the moons isn't going to do anything useful for Mars

 

[Beaugeard F]

And also one on Mars.
The rotation acting as a dynamo to "activate" in a larger scale what is left of Mars magnetic field...

 

[mfb]

Rotating a magnet doesn't create a stronger field than the same magnet without rotation. It can create a field that varies with time (if the magnet doesn't rotate around its symmetry axis) but I don't see how this would be useful here.
In general permanent magnets won't lead to any relevant planet-wide magnetic field, they are just too weak and don't scale well.

 

[Beaugeard F]

The Planet rotation.

 

[davenn]

The Planet rotation.

NO

Mars no longer has a global magnetic field ... large or weak. It only has "pockets" of magnetism here and there. This is because the core of Mars is solid. It can no longer create a magnetic field.

Magnetic fields on Mars are localised and crustal
from Wiki ...

Dave