Motion of Dark Matter Subhalos

In summary, the question being discussed is whether the motion of subhalos within a host halo is random or follows a specific pattern. However, due to the unknown nature of dark matter and its sensitivity to density waves, a definite answer cannot be given at this time. Additionally, the impact of factors such as a galaxy's spiral arms, supernova blasts, and the local bubble also play a role in the motion of subhalos.
  • #1
kadiliissaar
2
0
Hi,

I know that within the host halo there are smaller subhalos moving around. I was swondering that is their motion just random motion or does it follow some kind of pattern, e.g. circular motion centred at the centre of the dark matter halo?

Thanks,
 
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  • #2
This is a very good question to which, IMHO, there is not yet a clear answer. Given that we don't yet know exactly what 'Dark Matter' is, or even if there really is 'Dark Matter' rather than some non-Newtonian factor, it is hard to say.

IMHO, assuming generic 'Dark Matter', a lot depends on its sensitivity to 'density waves'. Will it be concentrated by a galaxy's spiral arms ? Will it be 'blown along' by a supernova's blast ?? Are we in a Dark Matter 'void' thanks to the 'Local Bubble' ??
http://en.wikipedia.org/wiki/Local_Bubble
 

1. What is the motion of dark matter subhalos?

The motion of dark matter subhalos refers to the movement of small, dense clumps of dark matter within larger dark matter halos. These subhalos are thought to form as smaller structures merge together within the larger halo, and they can affect the overall distribution of dark matter in the universe.

2. How do dark matter subhalos impact galaxy formation?

Dark matter subhalos can have a significant impact on galaxy formation by influencing the distribution of normal matter within a galaxy. As subhalos move through a larger dark matter halo, they can gravitationally pull on gas and dust, causing it to collapse and form stars. This process can ultimately lead to the formation of galaxies.

3. How do scientists study the motion of dark matter subhalos?

Scientists study the motion of dark matter subhalos through simulations and observations. Computer simulations use models of gravity and cosmology to predict the behavior of dark matter subhalos, while observations use telescopes to look for evidence of subhalos in the distribution of matter in the universe.

4. What have scientists learned about the motion of dark matter subhalos?

Scientists have learned that dark matter subhalos are an important component of the overall structure of the universe. They have also found evidence that subhalos may merge together to form larger structures, and that their interactions can affect the evolution of galaxies.

5. How does the motion of dark matter subhalos relate to the search for dark matter?

The motion of dark matter subhalos is closely tied to the search for dark matter, as it provides insight into the nature of this elusive substance. By studying the motion of subhalos, scientists can better understand the properties of dark matter and potentially uncover new clues about its composition and behavior.

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