Astrophysics after dark

The Axion Dark Matter Experiment uses a resonant microwave cavity within a large superconducting magnet to search for cold dark matter axions in the local galactic dark matter halo.Unusual for a dark matter detector

It is not located deep underground.Sited at the Center for Experimental Nuclear Physics and Astrophysics (CENPA) at the University of Washington

ADMX is a large collaborative effort with researchers from universities and laboratories around the world.

A dark-energy star is a hypothetical compact astrophysical object

Which a minority of physicists think might constitute an alternative explanation for observations of astronomical black hole candidates.

dark flow is a theoretical non-random component of the peculiar velocity of galaxy clusters.The actual measured velocity is the sum of the velocity predicted by Hubble's Law plus a possible small and unexplained velocity flowing in a common direction.

The dark photon is a hypothetical hidden sector particle

Proposed as a force carrier similar to the photon of electromagnetism but potentially connected to dark matter.In a minimal scenario

This new force can be introduced by extending the gauge group of the Standard Model of Particle Physics with a new abelian U(1) gauge symmetry.The corresponding new spin-1 gauge boson can then couple very weakly to electrically charged particles through kinetic mixing with the ordinary photon and could thus be detected.The dark photon can also interact with the Standard Model if some of the fermions are charged under the new abelian group.The possible charging arrangements are restricted by a number of consistency requirements such as :

Anomaly cancellation and constraints coming from Yukawa matrices.

In astrophysics and cosmology scalar field dark matter is a classical

Scalar field postulated to account for the inferred dark matter.