Abstract: The unusually short durations, high luminosities and high photon energies of the Crab nebula gamma-ray flares require the relativistic bulk motion of the emitting plasma. We explain the Crab ...

Abstract: We present new Jansky Very Large Array (VLA) radio images of the Crab nebula at 5.5 GHz, taken at two epochs separated by 6 d about 2 months after a gamma-ray flare in 2012 July. We find no ...

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IT has long been known that some of the radio-elements emit a penetrating type of X-rays known as the gamma rays. It is clear that these radiations arising from the nucleus of the radioactive atom ...

Crab nebula, also known as the Cat's Paw Nebula or the Bear Claw Nebula, this emission nebula is located in the constellation Scorpius. The butterfly nebula is a planetary nebula that looks like a ...

Cosmic gamma rays are a special probe to investigate sudden cosmic events in the universe. Unlike thermal emission, which ranges from radio to X-rays, cosmic gamma rays are often a direct probe of ...

A new Hubble Space Telescope image offers the most detailed view of the Crab Nebula, which is located 6,500 light-years from Earth. The star V830 Orionis features NGC 1999 reflection nebula ...