Tag

Microquasars

All articles tagged with #microquasars

astronomy1 year ago

"Unraveling Cosmic Mysteries: Black Hole Jets as Particle Accelerators"

Scientists have found evidence that microquasars, or "vampire black holes," may be the source of high-energy cosmic rays bombarding Earth. Using the High Energy Stereoscopic System (H.E.S.S.), researchers detected extremely high-energy gamma rays coming from the jets of the microquasar SS 433, indicating that these phenomena could be responsible for the energetic cosmic rays. The jets of SS 433, the first microquasar ever discovered, accelerate particles to high energies, shaping the surrounding supernova wreckage into a cosmic manatee. This discovery sheds light on the acceleration mechanism of particles in microquasars and may have implications for understanding cosmic rays from other astrophysical jets.

science-and-technology2 years ago

Unveiling Galactic Black Holes: Mysterious QPO Signals Expose New Features

An international team of scientists has detected a quasi-periodic oscillation (QPO) signal in the radio band from a Galactic black hole system, specifically the microquasar GRS 1915+105. This is the first time such a signal has been observed in microquasar systems, and it could provide evidence of a "jet" launched by a Galactic stellar-mass black hole. The QPO signal has a rough period of 0.2 seconds and appears under special physical conditions. Further observations are needed to fully understand these intriguing signals and their implications for black hole behavior.

astronomy2 years ago

Unveiling the Secrets of Galactic Black Holes: Astronomers' Latest Discoveries

Astronomers using the Five-hundred-meter Aperture Spherical radio Telescope (FAST) in China have discovered a quasi-periodic oscillation (QPO) signal in the radio band from a galactic microquasar system, GRS 1915+105. This is the first time such a signal has been observed outside of the X-ray context. The QPO signal, with a period of 0.2 seconds, may provide evidence of activity from a jet launched by a galactic stellar-mass black hole. The researchers suggest that the misalignment between the black hole's spin axis and its accretion disk could be causing this effect. Further observations of microquasars will help unravel the mysteries of these QPO signals.