What is the origin of the Milky Way's magnetic field?

In summary, the source of the magnetic field in our galaxy is not fully known. While the cosmic microwave background is a weak source of electromagnetic radiation, it is not the main contributor to the magnetic field. It is possible that the supermassive black hole in the center of the galaxy may play a role, but it is more likely that the activity surrounding the black hole, such as accretion and radiation, is a significant source of the magnetic field. Additionally, the many suns in our galaxy also emit electromagnetic radiation and contribute to the galactic-wide magnetic field.
  • #1
alvarogz
38
0
I was wondering what is the source of the magnetic field of our galaxy. Is it possible that such source could be the super massive black hole in the center of the galaxy?
Regards.
 
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  • #2
Have not heard of this...the cosmic microwave background is an outside source of electomagnetic radiation and will therefore have a VERY VERY weak "magnetic field".

Otherwise I know of no galactic wide field.

Rather than the supermassive black hole itself, as a source, I'd GUESS that all the activity in it's vicinty, accretion, radiation, etc would possibly be a more significant source.

The quasar is powered by an accretion disc around the black hole.

See here for a general discussion on quasars:

http://en.wikipedia.org/wiki/Quasar
 
  • #3
Another thought:
In our own solar system, not necessarily the entire galaxy, our own sun emits electromagnetic radiation ...all the time...hence there is an associated magnetic field...

But multiply this by the millions/billions (whatever it is) of suns throughout our galaxy and of course there results galactic wide magnetic fields coming from virtually all directions and distances...
 

1. What is the source of the Milky Way's magnetic field?

The source of the Milky Way's magnetic field is believed to be a combination of electrically charged particles in motion and the rotation of the galaxy itself. As the galaxy spins, it generates a dynamo effect that amplifies the magnetic field.

2. How strong is the Milky Way's magnetic field?

The strength of the Milky Way's magnetic field varies throughout the galaxy, but on average it is estimated to be about 10-6 Gauss, which is relatively weak compared to other spiral galaxies.

3. Does the Milky Way's magnetic field affect Earth?

Yes, the Milky Way's magnetic field does have an effect on Earth's magnetic field. However, the strength of the Milky Way's field is much weaker than Earth's, so it does not have a significant impact on our daily lives.

4. How is the Milky Way's magnetic field studied?

The Milky Way's magnetic field is studied through a combination of observations and simulations. Astronomers use telescopes to measure the polarization of light from celestial objects, which can provide information about the strength and direction of the magnetic field. Computer simulations are also used to model and understand the behavior of the magnetic field.

5. Can the Milky Way's magnetic field change over time?

Yes, the Milky Way's magnetic field can change over time. The strength and direction of the magnetic field can be influenced by various factors such as the movement of gas and stars within the galaxy, as well as interactions with other galaxies. However, these changes occur on a very slow timescale, so they are not easily observable in human lifetimes.

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