1.9k citations · 21.8k across the 225 of their papers we have counts for
11 papers · 2 filters
TeV gamma-rays and neutrinos from photo-disintegration of nuclei in Cygnus OB2
Luis A. Anchordoqui, John F. Beacom, Haim Goldberg +2
TeV gamma-rays may provide significant information about high energy astrophysical accelerators. Such gamma-rays can result from the photo-de-excitation of PeV nuclei after their p…
TeV gamma-rays from photo-disintegration/de-excitation of cosmic-ray nuclei
Luis A. Anchordoqui, John F. Beacom, Haim Goldberg +2
It is commonly assumed that high-energy gamma-rays are made via either purely electromagnetic processes or the hadronic process of pion production, followed by decay. We investigat…
Cosmic Neutrino Bound on the Dark Matter Annihilation Rate in the Late Universe
John F. Beacom
How large can the dark matter self-annihilation rate in the late universe be? This rate depends on (rho_DM/m_chi)^2 <sigma_A v>, where rho_DM/m_chi is the number density of dark ma…
The Advanced Compton Telescope Mission
Steven E. Boggs, James Kurfess, James Ryan +30
The Advanced Compton Telescope (ACT), the next major step in gamma-ray astronomy, will probe the fires where chemical elements are formed by enabling high-resolution spectroscopy o…
Upper Bound on the Dark Matter Total Annihilation Cross Section
John F. Beacom, Nicole F. Bell, Gregory D. Mack
We consider dark matter annihilation into Standard Model particles and show that the least detectable final states, namely neutrinos, define an upper bound on the total cross secti…
Guaranteed and Prospective Galactic TeV Neutrino Sources
Matthew D. Kistler, John F. Beacom
Recent observations, particularly from the HESS Collaboration, have revealed rich Galactic populations of TeV gamma-ray sources, including a collection unseen in other wavelengths.…
Direct X-ray Constraints on Sterile Neutrino Warm Dark Matter
Casey R. Watson, John F. Beacom, Hasan Yuksel +1
Warm dark matter (WDM) might more easily account for small scale clustering measurements than the heavier particles typically invoked in Lambda cold dark matter (LCDM) cosmologies.…
Protecting Life in the Milky Way: Metals Keep the GRBs Away
K. Z. Stanek, O. Y. Gnedin, J. F. Beacom +7
The host galaxies of the five local, z<0.25, long-duration gamma-ray bursts, each of which had a well-documented associated supernova, are all faint and metal-poor compared to the…
Diffuse Gamma Rays from the Galactic Plane: Probing the "GeV Excess" and Identifying the "TeV Excess"
Tijana Prodanovic, Brian D. Fields, John F. Beacom
Pion decay gamma rays have long been recognized as a unique signature of hadronic cosmic rays and their interactions with the interstellar medium. We present a model-independent wa…
The Cosmic Stellar Birth and Death Rates
John F. Beacom
The cosmic stellar birth rate can be measured by standard astronomical techniques. It can also be probed via the cosmic stellar death rate, though until recently, this was much les…
On the normalisation of the cosmic star formation history
Andrew M. Hopkins, John F. Beacom
Strong constraints on the cosmic star formation history (SFH) have recently been established using ultraviolet and far-infrared measurements, refining the results of numerous measu…