### N.Klein:"Can MOND explain the data scattering of "big G" ?"

Posted:

**Fri 22 Feb 2019 17:44**VIA lecture by Prof. Norbert Klein "Can MOND explain the data scattering of "big G" ?" was given on 22.02.2019.

Its record is in VIA library

http://viavca.in2p3.fr/norbert_klein.html

and its presentation is attached

The following questions were put during it

Houri Ziaeepour: Why only spiral galaxies used in this plot ?

Houri Ziaeepour: Some people say that the minimum acceleration a0 in ellipticals depend on the galaxy set.

Bernard: Did you try fitting for both a_0 and beta together?

Houri Ziaeepour: I am confused. You said that MOND in general is ruled out. Thus how do you interpret your conclusion about g experiments ?

Bernard: Well, you have precision measurements to go by.

Houri Ziaeepour: It does not work at cosmological scales. As you said in galaxy clusters

ant: Did you read: Absence of a fundamental acceleration scale in galaxies Davi C. Rodrigues 1,2*, Valerio Marra 1,2*, Antonino del Popolo3,4,5 and Zahra Davari6? MOND is ruled out at more than 10 sigma!!!!!

Bernard: for double fitting (a_0 and B beta together).

Houri Ziaeepour: The additional term you added to analysis may simply be a systematic not considered in the previous analysis. The MOND correction

Houri Ziaeepour: But it can have another origin rather than MOND

ant: So, according to you some MONDs are ruled out, other not. Which ones?

Jonathon Baird: It could also be extra parameters fitting a model to data... Do you remember the evidence off the top of your head?

Houri Ziaeepour: The estimation of electromagnetic acceleration is very difficult

ant: Did you receive feedback from MOND community?

Houri Ziaeepour: I am not experimentalist but it is very difficult to take into account all non-gravitational forces.

Jonathon Baird: Basically when you add parameters to your model you are able to fit a model better purely by virture of more parameters in your model. the statistical evidence will tell you how confident you should be with an extra parameter in your model.

Bernard: no sensitivity is too low for LIGO

Houri Ziaeepour: sure. We always need better experiments.

Bernard: Just work out the amplitude: its way too low.

You are welcome to continue discussion of this topic in replies to this post

Its record is in VIA library

http://viavca.in2p3.fr/norbert_klein.html

and its presentation is attached

The following questions were put during it

Houri Ziaeepour: Why only spiral galaxies used in this plot ?

Houri Ziaeepour: Some people say that the minimum acceleration a0 in ellipticals depend on the galaxy set.

Bernard: Did you try fitting for both a_0 and beta together?

Houri Ziaeepour: I am confused. You said that MOND in general is ruled out. Thus how do you interpret your conclusion about g experiments ?

Bernard: Well, you have precision measurements to go by.

Houri Ziaeepour: It does not work at cosmological scales. As you said in galaxy clusters

ant: Did you read: Absence of a fundamental acceleration scale in galaxies Davi C. Rodrigues 1,2*, Valerio Marra 1,2*, Antonino del Popolo3,4,5 and Zahra Davari6? MOND is ruled out at more than 10 sigma!!!!!

Bernard: for double fitting (a_0 and B beta together).

Houri Ziaeepour: The additional term you added to analysis may simply be a systematic not considered in the previous analysis. The MOND correction

Houri Ziaeepour: But it can have another origin rather than MOND

ant: So, according to you some MONDs are ruled out, other not. Which ones?

Jonathon Baird: It could also be extra parameters fitting a model to data... Do you remember the evidence off the top of your head?

Houri Ziaeepour: The estimation of electromagnetic acceleration is very difficult

ant: Did you receive feedback from MOND community?

Houri Ziaeepour: I am not experimentalist but it is very difficult to take into account all non-gravitational forces.

Jonathon Baird: Basically when you add parameters to your model you are able to fit a model better purely by virture of more parameters in your model. the statistical evidence will tell you how confident you should be with an extra parameter in your model.

Bernard: no sensitivity is too low for LIGO

Houri Ziaeepour: sure. We always need better experiments.

Bernard: Just work out the amplitude: its way too low.

You are welcome to continue discussion of this topic in replies to this post