Tag

Galactic Nuclei

All articles tagged with #galactic nuclei

science1 year ago

Webb Telescope Unveils Sombrero Galaxy's Dazzling Image and Fading Star Formation

The James Webb Space Telescope has captured a new image of the Sombrero Galaxy, revealing unexpected details. Unlike previous images from the Hubble Telescope, the JWST's Mid-Infrared Instrument shows that the galaxy's dust ring is not a significant site for star formation, and the central region features a flat disk rather than a halo of stars. The galaxy's active black hole is also less luminous than anticipated. These findings suggest the Sombrero Galaxy is more unusual than previously thought, with future studies likely focusing on its numerous globular clusters.

astronomy2 years ago

Black hole X-ray emissions challenge particle acceleration theory.

Astronomers have discovered a quasar, SMSS J114447.77–430859.3, with a jet of X-rays that is 60,000 times hotter than the sun. The quasar is located at the heart of a galaxy around 9.6 billion light-years away from Earth and is the most luminous example of such an object seen in the last 9 billion years of cosmic history. Quasars are black holes with bright, energetic jets of electromagnetic radiation beaming out of them from two sides as they feed on gases at the center of galaxies. Studying the quasar could offer astronomers a detailed insight into these powerful cosmic events and the effect they have on their galactic surroundings.