These joint efforts support the pathfinder for ngVLA technologies, focusing on very long baseline interferometry (VLBI) capabilities that enable ultra-sharp imaging of the Universe.
Radio Observations of Compact Symmetric Objects Shed New Light on Black Hole Phenomenon
Recent News
Astronomers Detect Magnetic Fingerprint of a Cosmic Explosion for the First Time
Using the U.S. National Science Foundation Very Large Array (NSF VLA) radio telescope, which is operated by the U. S. National Science Foundation National Radio Astronomy Observatory (NSF NRAO), the team detected polarized light from a gamma-ray burst (GRB) afterglow for the first time at radio wavelengths.
NSF VLA Sky Survey Sets New Standard for High-Resolution, Wide-Area Radio Astronomy
The U.S. National Science Foundation National Radio Astronomy Observatory (NSF NRAO) has completed observations for the Very Large Array Sky Survey (VLASS), the most detailed radio survey of the sky ever conducted.
Radio Observations of Compact Symmetric Objects Shed New Light on Black Hole Phenomenon
Credit: S. Dagnello, B. Saxton/NRAO/AUI/NSF
A groundbreaking investigation into Compact Symmetric Objects (CSOs), a peculiar class of galaxies, has revealed new insights into their spectacular but short-lived existence
Compact Symmetric Objects (CSOs) have long puzzled astronomers with their unique characteristics. These active galaxies harbor supermassive black holes that emit powerful jets traveling at near-light speeds in opposite directions. However, unlike their counterparts in other galaxies, these jets remain compact, not extending out to great distances as expected. For decades, scientists presumed that CSOs were youthful entities, with their jets destined to expand over time.
When a star is captured by the gravitational force of a black hole and shredded, or spaghettified, sometimes twin jets spiral outward. These jets can give birth to Compact Symmetrical Objects (CSOs), which scientists have confirmed are a unique class of active galaxies.
New findings, published in three papers in The Astrophysical Journal, challenge this notion. The Caltech-led team, spearheaded by Anthony (Tony) Readhead, Robinson Professor of Astronomy, Emeritus, discovered that CSOs have relatively short lifespans. Through an exhaustive review of literature and observations, the team identified over 3,000 CSO candidates, confirming 64 as authentic CSOs and recognizing 15 new candidates. These objects were previously observed by the U.S. National Science Foundation National Radio Astronomy Observatory (NSF NRAO)’s Very Long Baseline Array (VLBA), renowned for its unparalleled resolution.
The studies, funded by NSF, NASA, Caltech, and the Max Planck Institute for Radio Astronomy in Bonn, Germany, mark a significant step forward in understanding the dynamic processes shaping our universe. Read the full Caltech release and view NRAO’s scientific visualization animation.
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This news article was originally published on the NRAO website on March 26, 2024.
Recent News
U.S. National Science Foundation, NSF National Radio Astronomy Observatory and U.S. Naval Observatory Partner on Pathfinder for Next Generation Very Large Array
These joint efforts support the pathfinder for ngVLA technologies, focusing on very long baseline interferometry (VLBI) capabilities that enable ultra-sharp imaging of the Universe.
Astronomers Detect Magnetic Fingerprint of a Cosmic Explosion for the First Time
Using the U.S. National Science Foundation Very Large Array (NSF VLA) radio telescope, which is operated by the U. S. National Science Foundation National Radio Astronomy Observatory (NSF NRAO), the team detected polarized light from a gamma-ray burst (GRB) afterglow for the first time at radio wavelengths.
NSF VLA Sky Survey Sets New Standard for High-Resolution, Wide-Area Radio Astronomy
The U.S. National Science Foundation National Radio Astronomy Observatory (NSF NRAO) has completed observations for the Very Large Array Sky Survey (VLASS), the most detailed radio survey of the sky ever conducted.