1 code implementation • 27 Jun 2018 • Vivian Poulin, Tristan L. Smith, Daniel Grin, Tanvi Karwal, Marc Kamionkowski
Cosmological observations are used to test for imprints of an ultra-light axion-like field (ULA), with a range of potentials $V(\phi)\propto[1-\cos(\phi/f)]^n$ set by the axion-field value $\phi$ and decay constant $f$.
Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology
no code implementations • 15 Nov 2006 • Daniel Grin, Giovanni Covone, Jean-Paul Kneib, Marc Kamionkowski, Andrew Blain, Eric Jullo
A search for optical line emission from the two-photon decay of relic axions was conducted in the galaxy clusters Abell 2667 and 2390, using spectra from the VIMOS (Visible Multi-Object Spectrograph) integral field unit at the Very Large Telescope.
astro-ph High Energy Physics - Phenomenology
