I am curious about mass of a galaxy without dark matter and with dark matter.I searched but I couldnt found.I ll be happy If you help me.
How does that change the question?Without dark matter I mean without dark matter mass my fault I forget mass
I was wondering about that, or something related rather - in galaxy collisions the matter tends to coalesce into a single galaxy after a while due I believe to some kind of friction - but with high enough collision velocity it seems that (some part of) the dark matter halos could just move through each other and continue on their way. If that does happen, not only would we be left with a DM poor merged galaxy, but also with stray haloes of dark matter zooming away without much matter left in them . Is that something that happens and if so do we see such stray halos (through lensing or other means)?There exist both DM-rich and DM-poor galaxies.
Actually, I think the dust interactions DO contribute an effect, it's just that stars/planets are so far apart that THEY don't hit each other.Thanks, I thought "some kind of friction" arising from matter-matter interaction (gas clouds maybe?) played a role in the merger process - but you re saying it's minor and essentially gravitational effects alone explain the process, did I get that right?
Which part of post #10 did you not understand?I was watching House and there House said dark matter makes galaxies 6 times bigger mass.And I am curious about is that same for every galaxy ? Example a galaxy mass is m without dark matter.But with dark matter 6m.Is that true for all galaxies ? (85/15 near to 6 so I made a connection)
But this sound like stupid I guess