Cherenkov radiation from stars constrains hybrid MOND dark matter models

Tensor Detection Severely Constrains Axion Dark Matter

Indirect Dark Matter Detection Using Cherenkov Telescopes

The topic of this report pertains to the detection and analysis of γ-rays emitted from the galactic center (GC) using the Very Energetic Radiation Imaging Telescope Array System (VERITAS), a Cherenkov array system. The specific cause of γ-ray production around this region is speculated to be Dark Matter (DM). DM is an extension of the current standard model. The evidence for DM is so plentiful,...

Dark matter and dark radiation

Lotty Ackerman, Matthew R. Buckley, Sean M. Carroll, and Marc Kamionkowski California Institute of Technology, Pasadena, California 91125, USA (Received 16 December 2008; published 23 January 2009) We explore the feasibility and astrophysical consequences of a new long-range Uð1Þ gauge field (‘‘dark electromagnetism’’) that couples only to dark matter, not to the standard model. The dark matter...

Relativistic MOND as an alternative to the dark matter paradigm

Milgrom’s Modified Newtonian dynamics (MOND) provides an efficient way to summarize phenomenology of galaxies which does not lean on the notion of dark matter; it has great predictive power. Here I briefly review MOND as well as its implementation as a nonrelativistic modified gravity theory, AQUAL. Gravitational lensing and cosmology call for a relativistic gravity theory different from genera...

Modified Gravity vs Dark Matter: Relativistc theory for MOND

MOND, invented by Milgrom, is a phenomenological scheme whose basic premise is that the visible matter distribution in a galaxy or cluster of galaxies alone determines its dynamics. MOND fits many observations surprisingly well. Could it be that there is no dark matter in these systems and we witness rather a violation of Newton’s universal gravity law ? If so, Einstein’s general relativity wou...