dark matter world science festival

Maybe that will tell us something about dark matter. What could be out there and if there is something new, what we look for? I think at the time there were some imperial discrepancies with Mercury’s orbit and so forth and when he came up with general relativity you look at this he say oh yes this has to be true because it’s so beautiful. He was the director of Nordita. Her observations implied that there was an invisible form of matter that fills all of space. And soHOCKENBERRY: I was I was really feeling for you there for a moment and then I kind of went right off the pool edge there.McGAUGH: So to cut it short the the one theory that predicted what I was seeing was this crazy theory of milgram’s.

So when these clusters collide the gas gets stuck. It’s this orbital mechanics that lays at the foundation of much of this physics is what Newton explained and the acceleration varies as you go further and further out.The thing that I noticed in my own work that I had not expected was that the discrepancy that is where you infer the need for dark matter depends on a particular physical scale. But when things are spinning there is a different calculation we can make about the relationship between two objects. Right.McGAUGH: Well in this specific case I actually mean where would you hide that much normal matter in that kind of Galaxy because as Katie pointed out most of the mass has gone through, the gas has stuck and most of the mass that’s unseen is going.. so it has to be something that’s normal matter.

We know it’s very weakly interacting.

So the only thing that I would really take issue with a little bit is you know when we say the predictions of dark matter because we can predict from a particular model of dark matter taking into account certain phenomena. So one thing that Stacy mentioned was OK this Milgrom formula works well and galaxies and what happens with Bulloch clusters and what happens in galaxy clusters.

The hard part is actually building a satisfactory model that explains these data.HOCKENBERRY: When you say satisfactory model you mean a model that doesn’t ditch the rest of physics for the last hundred years. But what’s really interesting. That’s really helpful.

DARK UNIVERSE – WORLD SCIENCE FESTIVAL (Video Clip) NARRATOR: About 50 years ago armed with the very latest deep space measuring tools astrophysicist Vera Rubin went about an ambitious task to clear up some uncertainty about the rotation of spiral galaxies in the universe. Which raises the big question: What if we have failed to find dark matter because it isn’t there?

Make.HOCKENBERRY: Yes pretty good. The stars on the outside were spinning so quickly that based on the observable mass there is no way by the laws of physics they could be kept from spinning off like that ball or tear apart the galaxies altogether. But a lot of the ways it was advertised was Einstein was right. But seems to work very very well. Stacy.

And since then we’ve come up with a story for what that could, how that could happen in the conventional dark matter picture. Are they equivalent?FREESE: I should have been careful. It’s called nitrogen.

Well there’s not necessarily a complete theory that you can take all the way back to the early universe and forward.

But I wanted to get a sense of you know where people stand.
So you need a dark matter to form the galaxies in the first place but simply on the observational side if you put all the different pieces together the supernova measurements clusters of cosmic microwave background, structure the how many galaxies we have of what mass and so on. One of the things that would be really convincing to me is if you could map the gamma rays sky well enough that you not only saw this but it looked like our simulations predicted should look like and you see that dark matter halo and the emission of gamma rays not just for our own Milky Way but also the sub Halos that are predicted to exist containing dwarf galaxies and so forth.HOCKENBERRY: So what’s the fermi bubble that is predicted for our galaxy.FREESE: So the Fermi satellite is mapping the gamma ray sky. Shaking up Dark Matter at the World Science Festival. OK.

And all we can detect is that there’s something bending the coathangers. Excellent excellent. This is how you deal with dark matter right there.

And then is that dark matter or just some of the dark matter.

Yes. But even this little interaction that tells you it has a standard mild force other than gravity means that we can find it with detectors that are made up of stuff that we know.HOCKENBERRY: Right.

But I think the conventional explanation of dark matter is the simpler one to go with for right now and as Justin pointed out the empirical relationship does not constitute a theory and to say that you can explain all these data. The idea that something else is a very very very unremarkable idea. They have mass. Date: October 12, 2019 00:00 – 02:00; Categories: WORLD SCIENCE FESTIVAL; If you believe the world’s leading physicists, the vast majority of matter in the universe is hiding in plain sight. Right. There we go.

Board, Can you bring the stage light down give me a total black here. Two types of matter.HOCKENBERRY: OK. I’m ignorant. We need dark matter to start clumping together early on to make galaxies and at then later on it’s then the ordinary matter that falls into these dark matter objects and so I see the cosmic microwave background is now on the screen.
That’s terrible for a theory like MOND that’s trying to do away with dark matter.

Every galaxy she measured told her there was something wrong with the basic mechanics of the universe.

Some envision invisible matter hiding within the folds of extra spatial dimensions. And the idea that I had is that if dark matter forms a superfluid. [00:15:04] HOCKENBERRY: Well the question of what our assumptions are and what evidence we would have for any of this stuff is really the exploration and the puzzle that we have in our hand. LEVEL 2, FOYER, QUEENSLAND MUSEUM, South Brisbane, QLD, This untenured person. Lovely.

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