A T N F    D a i l y    A s t r o n o m y    P i c t u r e

5th of March 2015
Searching for high-energy particles hitting the moon
by Justin Bray (University of Manchester, U.K.)
High-energy cosmic rays and neutrinos, when they hit the moon, should produce a pulse of radio waves that can be detected from earth. A series of experiments has searched for these pulses with a range of radio telescopes. None of them have detected a pulse, which excludes some astrophysical models of the high-energy neutrino flux, and the more sensitive experiments are now close to detecting the top end of the cosmic-ray spectrum. The photo on the left was taken during the first such experiment with the Parkes telescope, in 1995. (Image credit: Seth Shostak.) The figure on the right shows the positions of the beams on the moon during the most recent experiment, using the Parkes 21 cm multibeam receiver (Bray et al. 2015 ).

<<   |   archive   |   about   |   today   *   ATNF   |   Parkes   |   ATCA   |   Mopra   |   VLBI   |   ASKAP   |   >>