دانلود رایگان مقاله بدیهی سازی انرژی تاریک با کهکشان های فعال

ABSTRACT

AGN jets carry helical magnetic fields, which can affect dark matter if the latter is axionic. This preliminary study shows that, in the presence of strong helical magnetic fields, the nature of the axionic condensate may change and become dark energy. Such dark energy may affect galaxy formation and galactic dynamics, so this possibility should not be ignored when considering axionic dark matter.

4. Conclusions

We have investigated the behaviour of axionic dark matter in the presence of a helical magnetic field and found that, when the condensate becomes electromagnetically dominated, it ceases to be dark matter and becomes dark energy instead. We have applied our findings in AGNs and showed that the helical magnetic field along the AGN jets near the AGN core can be strong enough to convert axionic dark matter into dark energy. Lacing the AGN black holes with dark energy may have profound implications for galaxy formation and galactic dynamics (e.g. rotation curves), because dark energy is gravitationally repulsive. For example, it might assist with the central cusp problem of dark matter halos. Note that, in contrast to the evenly distributed dark energy, which dominates the Universe today, the axionic dark energy in AGNs is localised in the core parts of the AGN jets. Our study demonstrates that the issue warrants deeper investigation. It is likely that relativistic corrections may influence the results.