It's thought that about 85% of all matter in the universe is dark matter. We can't see this mysterious substance, but we think it exists because we can measure its gravitational effects on ordinary matter. One theory is that dark matter could be made up of axions, hypothetical subatomic particles that have yet to be detected. Last month, a team of physicists said that axions should gather in dense clouds around neutron stars. If this is correct, then dark matter must also be inside the neutron stars. It must change the physical properties of the neutron matter under the pressure in the core of neutron stars. The volume content of the dark matter must affect the overall structure of the neutron stars, since it is unlikely to interact with the ordinary neutrons via the electroweak or strong forces. If so, the small amounts of dark matter must cause the neutron stars to collapse immediately. But these stars are relatively stable, with similar diameters and no tendency to collapse without an influx of ordinary, visible matter from nearby companions. White dwarf stars are similarly stable. Is there a physical explanation for this observable stable behaviour in a world full of heavy dark matter with no repulsive or interactive properties?
Remark: Dark matter is not neutrons, because the free neutrons decay within a quarter of an hour.
I reckon dark matter can influence the stability of compact stellar objects in several ways such as:
*General-Relativistic Stability: Dark matter, particularly in the form of weakly interacting massive particles (WIMPs), may stabilize supermassive stars (SMSs) against general-relativistic instabilities, potentially allowing for higher mass limits before collapse.
*Energy Transport: Asymmetric dark matter can affect stellar structure and evolution by altering energy transport within stars, impacting core convection and fuel availability, which in turn influences stellar lifetimes and luminosity.
*Interactions with Baryonic Matter: In regions of high dark matter density, interactions can inhibit star formation and alter evolutionary pathways, delaying main sequence evolution.
*Shock Waves: Macroscopic dark matter objects moving through stars can generate shock waves, leading to detectable emissions in optical and X-ray wavelengths.
dark matter isnt necessarily a bad thing as it can influence stability or compact objects by putting force on to it. we know it has an impact as we can detect the shockwaves caused by it, especially when it crosses through solid/ partially solid objects such as stars and planets.
it can also delay decay of other materials in the core of a star i believe
this is not an expert field of mine but i believe that Dr Albaladejo has probably given you the best answer so far :)
Are there some quantitively correct estimations of the influence of the mentioned above factors on the behavior of the typical compact objects?
The characteristics of the compact objects are wll known on my knowledge. The prospected density of the dark matter is also estimated with sufficient accuracy. The fact, that the dark matter does not interacts with the common matters, eases the computation (DM requires no equation of state, as the dark matter has apparently no state at all in hydrodynamic sense).
Interesting to get the answer of the specialists on this fine subject.
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