Astronomers could use a synthetic cosmos to unravel dark matter mysteries

[Admin]

A simulated universe created by a supercomputer should help astronomers better analyze dark matter and dark energy clues delivered by "dark universe detective" telescopes Roman and Rubin.

Astronomers could use a synthetic cosmos to unravel dark matter mysteries : Read more

 

[Questioner]

"...its interaction with gravity, ..."

Again, gravity is the interaction between mass fields.
Something can't "interact with gravity". That is an objectification gravity that doesn't make any sense.

If their modeling shows the mass 'halos' to be more resilient/robust than sloppy fluid DM it would likely indicate the mass halo is something other than particulate fluid DM.
It being instead a possibly unexpected mass field or fields of singular, possibly identifiable bodies.

 

[DC8Captain]

With the new simulated universe we now have a simulated universe within a simulated universe.

 

[Torbjorn Larsson]

It gives us a chance to exercise our processing pipelines, better understand our analysis codes, and accurately interpret the results so we can prepare to use the real data right away once it starts coming in.

"We have to wait a while anyway..."

gravity is the interaction between mass fields.

Gravity is well described by general relativity, which is the basis for dark energy-dark matter [LCDM] cosmology, and it is sourced by mass energy while its interactions are described by its Lagrangian. (https://en.wikipedia.org/wiki/Lagrangian_mechanics) So not only massive fields but also massless fields (photons, say).

Well known examples of dark energy gravity interactions is the current expansion constraint on space (https://en.wikipedia.org/wiki/Scale_factor_(cosmology) - note the radiation dominated era constraint, re massless fields) and of dark matter gravity interactions is weak lensing (https://en.wikipedia.org/wiki/Weak_gravitational_lensing).

 

[Questioner]

Photons have relative mass.