Results 1 to 10 of about 3,035 (52)

NuSTAR Tests of Sterile-Neutrino Dark Matter: New Galactic Bulge Observations and Combined Impact

, 2020
We analyze two dedicated NuSTAR observations with exposure ${\sim}190$ ks located ${\sim}10^\circ$ from the Galactic plane, one above and the other below, to search for x-ray lines from the radiative decay of sterile-neutrino dark matter.
Beacom, John F., Horiuchi, Shunsaku, Krivonos, Roman, Ng, Kenny C. Y., Perez, Kerstin, Roach, Brandon M., Wik, Daniel R.   +6 more
core   +1 more source

Axion Like Particles and the Inverse Seesaw Mechanism [PDF]

, 2015
Light pseudoscalars known as axion like particles (ALPs) may be behind physical phenomena like the Universe transparency to ultra-energetic photons, the soft $\gamma$-ray excess from the Coma cluster, and the 3.5 keV line.
Carvajal, C. D. R., Dias, A. G., Nishi, C. C., Sánchez-Vega, B. L.   +3 more
core   +2 more sources

Detection of ultra high energy neutrinos by IceCube: Sterile neutrino scenario [PDF]

, 2013
The short-baseline neutrino oscillation experiments, the excess of radiation from the measurement of the cosmic microwave background radiation, the necessity of the nonbaryonic dark matter candidate and the depletion of the neutrino flux in IceCube all ...
Rajpoot, Subhash, Sahu, Sarira, Wang, Hsi Ching   +2 more
core   +2 more sources

Impact of Bayesian prior on the characterization of binary black hole coalescences [PDF]

, 2017
In a regime where data are only mildly informative, prior choices can play a significant role in Bayesian statistical inference, potentially affecting the inferred physics.
Chatziioannou, Katerina, Gerosa, Davide, Haster, Carl-Johan, Vitale, Salvatore, Zimmerman, Aaron   +4 more
core   +5 more sources

Revisiting the SN1987A gamma-ray limit on ultralight axion-like particles [PDF]

, 2014
We revise the bound from the supernova SN1987A on the coupling of ultralight axion-like particles (ALPs) to photons. In a core-collapse supernova, ALPs would be emitted via the Primakoff process, and eventually convert into gamma rays in the magnetic ...
A. Mirizzi, A. Payez, A. Payez, A. Ringwald, Alessandro Mirizzi, Alexandre Payez, ALPS collaboration, Andreas Ringwald, Carmelo Evoli, CAST collaboration, D. Horns, E.N. Alekseev, E.N. Alekseev, F. Tavecchio, G. Carosi, G.G. Raffelt, I.G. Irastorza, IAXO collaboration, J.F. Cooper, LAT collaboration, M. Meyer, M.S. Pshirkov, Maurizio Giannotti, P. Arias, R. Almy, R. Ballou, R. Jansson, S. Angus, S. Blinnikov, Tobias Fischer   +29 more
core   +1 more source

Prompt Electromagnetic Transients from Binary Black Hole Mergers [PDF]

, 2018
Binary black hole (BBH) mergers provide a prime source for current and future interferometric GW observatories. Massive BBH mergers may often take place in plasma-rich environments, leading to the exciting possibility of a concurrent electromagnetic (EM)
Baker, John G., Etienne, Zachariah B., Giacomazzo, Bruno, Kelly, Bernard J., Schnittman, Jeremy   +4 more
core   +4 more sources

AMS-02 antiprotons, at last! Secondary astrophysical component and immediate implications for Dark Matter

, 2015
Using the updated proton and helium fluxes just released by the AMS-02 experiment we reevaluate the secondary astrophysical antiproton to proton ratio and its uncertainties, and compare it with the ratio preliminarly reported by AMS-02.
Boudaud, Mathieu, Cirelli, Marco, Genolini, Yoann, Giesen, Gaëlle, Poulin, Vivian, Salati, Pierre, Serpico, Pasquale D.   +6 more
core   +3 more sources

Constraints on violation of Lorentz invariance from atmospheric showers initiated by multi-TeV photons

, 2016
We discuss the effect of hypothetical violation of Lorentz invariance at high energies on the formation of atmospheric showers by very-high-energy gamma rays.
Rubtsov, Grigory, Satunin, Petr, Sibiryakov, Sergey   +2 more
core   +1 more source

Constraints on leptophilic dark matter from the AMS-02 experiment

, 2017
The annihilation of dark matter particles in the galactic halo of the Milky Way may lead to cosmic ray signatures that can be probed by the AMS-02 experiment, which has measured the composition and fluxes of charged cosmic rays with unprecedented ...
Cavasonza, Leila Ali, Gast, Henning, Krämer, Michael, Pellen, Mathieu, Schael, Stefan   +4 more
core   +1 more source

Indirect Searches for Dark Matter: a status review

, 2012
I review in a schematic way the current status of indirect searches for Dark Matter: I list the main relevant experimental results of the recent years and I discuss the excitements and disappointments that their phenomenological interpretations in terms ...
Cirelli, Marco
core   +1 more source