The Physics of Dark Matter - Lecture 1

The Physics of Dark Matter - Lecture 1
Speaker: M. Lisanti (Princeton University)
Spring School on Superstring Theory and Related Topics | (smr 2842)
2016_03_10-10_15-smr2842

[@PoundIsabel-v1f]

Walker Kimberly Martinez Susan Lewis Matthew

[@IsaiahUla-r6w]

Allen Matthew Lee Christopher Perez Jennifer

[@jackymarcel4108]

Perez Sharon Martinez Helen Johnson Eric

[@Jason-gt2kx]

A Novel Dark Matter Hypothesis Maybe Dark Matter is not a WIMP, but could instead be a deformation of space-time by which the curvature of space-time ALONE is the cause of the gravitational effect. Gravity is the consequence of the curvature of space-time. It may be possible that the structure of space-time itself could be warped without the presence of matter. Space-time has been shown to react like a fabric by warping, twisting, and propagating independent of mass. These properties have been proven with observations of gravitational lensing, frame dragging, and now gravitational waves. Fabrics can be stretched, pressured, and/or heated to the point of deformation. Such extreme conditions were all present during inflation, so it is plausible that space-time’s elastic nature could have hit its yield point and permanently deformed. Therefore, if gravity is the consequence of the warping of space-time, and fabrics can be permanently deformed, then a deformation could create a gravitational effect independent of mass. Prediction: Spacetime's elastic property hits a yield point, so only that part of geodesic's "stretch marks" would remain after inflation stopped. These steep gravitational wells would not follow the inverse square law. I am looking a way to test this with gravitational lensing an all or mostly dark matter galaxies. I am looking for Observationalist to help test if you know of someone who might be interested.

[@astha192]

Watch Bullet Cluster articles

[@happydays4551]

16:34 thats me just got to class, late again on my particle math class, it makes my head spin....

[@Pyrophoro]

You rock. Make this the best time of your life.

[@nirbhaynandan72]

DOes deserve to teach there..... to me it seems she is talking nonsense. I can teach better than this...and it will be far more interesting lecture....i am teaching astrophysics my self. I have done my master in maths...but in love with physics. IF Maths is wife then physics is my girl friend and wife knows this.

[@makayla4292]

@@nirbhaynandan72 I'm a phd student working on a dark matter experiment and I think this is a great lecture sooo check yourself dude

[@ultraslay7635]

@@makayla4292 agreed. This person's attitude shows how good a teacher and physicist he is. Not respecting another astrophysicist.

[@otakudnp3880]

I don't get if the dark matter halo surrounds a galaxy, then the galaxy rotation curves should be flat even inside the galaxy.....

[@timjohnson3913]

I don’t think there is believed to be dark matter in the center/core of the galaxies.

[@bubblebobble9654]

Awesome lecture.

[@gr-xw3sp]

It is true that some models for DM predict peaks of DM at the center of galaxies, but those are mainly classical computational models that assume DM in galactic halos as a gas of classical point particles. But that's not the way DM exists: since DM does not interact with any radiation it never exists as localized point-like particle (like an electron sometimes is.) Quite the contrary, it only exists in states similar to a free wave under no potential. In fact the only potential that DM "feels" is the gravitation potential, so the DM particles in galactic halos are in a non-localized state similar to those of electrons around an atomic nucleus (but under gravitational potential Vg(r) instead of electrical, of course.) This link below shows the publication of a quantum model for DM galactic halos which predicts their distributions being flat at the center of galaxies, as have been observed: www.vixra.org/abs/1702.0046

[@williamolenchenko5772]

Has anyone performed the exercise on the mean time between collisions in the galactic disk? I don't get the answer of 10^22 years given at 10:00. I get 2.6 x 10^19 years. Help!

[@mdaitaz9866]

change the unit of distance of the particle or radius of the galactic disk from CGS to SI or SI to CGS ... 10^19 to 10^22 power diff. 2 .there you will get ans

[@happydays4551]

what she forgot to say was "dark matter" aint dark it "clear"

[@thefrustratedscientist]

Wow great lecture..!!

[@ImAmadeus626]

Why is the BH 10 to the 6th power?

[@Flippy_Nips]

I assume it swallowed a ton of matter to become that heavy. 10^6 solar masses is really heavy if you think about it.

[@carlmalone4011]

The observation is that spacetime around galaxies is curved in an unexplained way. Therefore more particles and unknown ones ? Seems like particles are the panacea to explain this ? What about entropy generated curvature ? Entanglement curves spaceime.

[@realitynowassigned]

The light from your nearest cities are preventing you from seeing the night sky the way its always been seen by the average observer and if you never saw it you cant imagine what its like and that should upset us all

[@chanch0618]

27:00 ... (:

[@katherinelealleal8987]

▽•Β=0

[@josesaldivar655]

Way too many ah's. So annoying . highly educated people. Oh boy.