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Revealing the supernova-gamma-ray burst connection with TeV neutrinos.
Gamma-ray bursts (GRBs) are rare, powerful explosions displaying highly relativistic jets. It has been suggested that a significant fraction of the much more frequent core-collapse supernovae are… Expand
Constraints on diffuse gamma-ray emission from structure formation processes in the Coma cluster
We analyse five-year (63 months) data of the Large Area Telescope on board Fermi satellite from the Coma galaxy cluster in the energy range between 100 MeV and 100 GeV. The likelihood analyses are… Expand
Detection of neutrinos from supernovae in nearby galaxies.
While existing detectors would see a burst of many neutrinos from a Milky Way supernova, the supernova rate is only a few per century. As an alternative, we propose the detection of approximately 1… Expand
Modeling evolution of dark matter substructure and annihilation boost
We study evolution of dark matter substructures, especially how they lose mass and change density profile after they fall in gravitational potential of larger host halos. We develop an analytical… Expand
Constraints on the annihilation cross section of dark matter particles from anisotropies in the diffuse gamma-ray background measured with Fermi-LAT
Annihilation of dark matter particles in cosmological halos (including the halo of the Milky Way) contributes to the diffuse gamma-ray background (DGRB). As this contribution will appear anisotropic… Expand
Fermi-LAT constraints on dark matter annihilation cross section from observations of the Fornax cluster
We analyze 2.8-yr data of 1?100 GeV photons for clusters of galaxies, collected with the Large Area Telescope onboard the Fermi satellite. By analyzing 49 nearby massive clusters located at high… Expand
Constraints on decaying dark matter from the extragalactic gamma-ray background
If dark matter is unstable and the mass is within GeV-TeV regime, its decays produce high-energy photons that give contribution to the extragalactic gamma-ray background (EGRB). We constrain dark… Expand
Short gamma-ray bursts as a possible probe of binary neutron star mergers
- S. Ando
- 21 May 2004
We study the properties of short gamma-ray bursts (GRBs), based on the assumption that they are all connected to binary neutron star mergers, whose mechanism contains a large amount of uncertainty.… Expand
Gamma-ray probe of cosmic ray pressure in galaxy clusters and cosmological implications
Cosmic rays produced in cluster accretion and merger shocks provide pressure to the intracluster medium (ICM) and affect the mass estimates of galaxy clusters. Although direct evidence for cosmic ray… Expand
High-energy neutrinos from reverse shocks in choked and successful relativistic jets
Highly relativistic jets are a key element of current gamma-ray burst models, where the jet kinetic energy is converted to radiation energy at optically thin shocks. High-energy neutrinos are also… Expand