Articles tagged with Black Holes
Astronomers have detected the 'frame-dragging' effect, a prediction by Albert Einstein 80 years ago, in disks of gas swirling around black holes. The team used X-ray astronomy satellites to measure the precession of accretion disks, finding evidence of frame dragging in two black hole systems.
Astronomers have found powerful accelerators of material close to home, in our own galactic neighborhood, as nearby black holes with jets. The jets appear to move at velocities approaching the speed of light and are thought to be connected to the accretion disk and surrounding regions.
Researchers have developed a new theory that can pinpoint more black hole candidates in distant space by analyzing data from the NASA Rossi X-ray Timing Explorer satellite. The team used this approach to identify a black hole candidate at GRS 1915+105, suggesting that others may exist before the year is out.
A University of Illinois professor has modeled gravitomagnetic induction as the gravitational analog of Faraday induction in electromagnetism. The effect could influence a neutron star's spin, internal structure and orbital motion.
Scientists detect unique X-ray vibrations in black hole candidate GRS 1915+105, potentially revealing its mass and rotation rate. The discovery is consistent with predictions made by the Stanford astrophysics group three years ago.
Astronomer Martin Gaskell suggests that many galaxies harbor pairs of giant black holes revolving around each other. His research on quasars indicates a clear trend in gas velocity changes over time, pointing to the presence of binary black holes with masses similar to 4 billion solar units.