- #1
etotheipi
In the other thread, it was noted that dark matter doesn't interact with ordinary matter.
Now I tread cautiously, not knowing any of the relevant theory. In some school questions, I've come across discussion of 'dark matter halos' which are necessary to ensure the rotation curve of the galaxy fits what we observe; an example would be something like:
For the purposes of this problem, for instance, we're just supposed to assume the dark matter interacts gravitationally just like ordinary matter does.
But if dark matter doesn't actually interact with ordinary matter, electromagnetically, gravitationally, or otherwise, then I wondered if someone could explain to me how we should perform these sorts of calculations? Thanks!
Now I tread cautiously, not knowing any of the relevant theory. In some school questions, I've come across discussion of 'dark matter halos' which are necessary to ensure the rotation curve of the galaxy fits what we observe; an example would be something like:
For the purposes of this problem, for instance, we're just supposed to assume the dark matter interacts gravitationally just like ordinary matter does.
But if dark matter doesn't actually interact with ordinary matter, electromagnetically, gravitationally, or otherwise, then I wondered if someone could explain to me how we should perform these sorts of calculations? Thanks!