Constraints on ultra-high-energy neutrino flux from radio observations of the Moon S. Buitink1,4, H. Falcke2,3, C. James2, M. Mevius4, O. Scholten4, K. Singh4,5, B. Stappers6, and S. ter Veen2 1Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA 2Dept. of Astrophysics, IMAPP, Radboud University Nijmegen, 6500 GL Nijmegen, The Netherlands 3ASTRON, P.O. Box 2, 7990 AA Dwingeloo, The Netherlands 4KVI, University of Groningen, The Netherlands 5Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium 6Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, Univ. of Manchester, Manchester M13 9PL, UK
Received: 16 Nov 2010 – Revised: 30 Jun 2011 – Accepted: 21 Sep 2011 – Published: 22 Aug 2012
Abstract. The NuMoon project aims to study ultra-high-energy neutrinos and cosmic rays by using radio telescopes to
search for short pulses from the Moon.
These pulses are created when a neutrino or cosmic ray impinges on the Moon and interacts below the
lunar surface. Part of the energy is
converted into a hadronic shower, which emits radio emission in a process known as the Askaryan effect. In
the first phase of the NuMoon project, 46 hrs of data were collected with the Westerbork Synthesis Radio
Telescope in a low frequency band: 40–80 MHz. This resulted in an upper limit on the neutrino flux above
1022 eV which is an order of magnitude lower than previous limits. Additionally, an upper limit has
been set on the ultra-high-energy cosmic-ray flux. The second phase of NuMoon will consist of observations
with LOFAR.
Citation: Buitink, S., Falcke, H., James, C., Mevius, M., Scholten, O., Singh, K., Stappers, B., and ter Veen, S.: Constraints on ultra-high-energy neutrino flux from radio observations of the Moon, Astrophys. Space Sci. Trans., 8, 29-33, doi:10.5194/astra-8-29-2012, 2012.