All articles tagged with #gamma ray
NASA's Fermi Telescope has observed a young star cluster, Westerlund 1, emitting gamma-ray bubbles extending over 650 light-years, providing new insights into cosmic ray outflows and their role in galaxy evolution.
Astronomers have used XMM-Newton, Chandra, and NuSTAR space telescopes to investigate the nature of a newly-discovered very-high-energy source, 2FHL J1745.1–3035, and found that it may be a powerful pulsar wind nebula (PWN). The source, located near the Galactic center, exhibits hard gamma-ray spectrum and is a TeV emitter. Analysis of X-ray properties suggests that it is compact with extended emission, and its broadband X-ray spectrum is best-fitted with a broken power law model. If confirmed, this would be one of the hardest PWNe ever detected in X-rays and the hardest in gamma-rays.
Astronomers have captured the highest-resolution gamma-ray image ever taken, revealing the Vela Pulsar in unprecedented detail using a new telescope designed for gamma rays. The breakthrough image, 40 times better than the previous best, was achieved by stacking photographic film to trace gamma rays with high precision and lifting it to an altitude of 35 to 45 kilometers using a balloon telescope. This new approach has the potential to revolutionize gamma-ray observations and contribute to multi-messenger astronomy, opening up new possibilities for studying the most energetic events in the universe.
NASA astronomers have detected a mysterious signal originating from beyond our galaxy using the Fermi Gamma-ray Space Telescope, which is unrelated to the cosmic microwave background (CMB). The signal, with an unprecedented magnitude, is believed to be linked to a similar gamma-ray feature observed in 2017, potentially originating from a single unidentified source. This unexpected discovery offers new insights into the early universe and presents an opportunity to understand the formation of dipole structures in the cosmic microwave background, providing valuable scientific details dating back to the universe's earliest stages.
NASA astronomers have detected an unexpected and unexplained signal coming from outside our galaxy while analyzing data from the Fermi Gamma-ray Space Telescope. The signal, which is unrelated to what they were originally searching for, appears to be a much stronger gamma-ray dipole in a different part of the sky than expected. This discovery could challenge current ideas about the creation of the cosmic microwave background and provide insight into physical processes in the early universe.