Black Holes Follow a Surprising Rule When Launching Powerful Jets

Topic: Astronomy

A team of astronomers discovered that black holes of all sizes follow the same rule when launching powerful jets. They studied how supermassive and stellar-mass black holes behave after consuming a star's material. The study found that these black holes launch jets at the same critical stage, regardless of their size.

An international team of astronomers has made an exciting discovery about black holes. They found that these cosmic objects follow a surprising rule when launching powerful jets.

The researchers studied how supermassive and stellar-mass black holes behave after consuming a star's material. Supermassive black holes are millions of times heavier than our sun, while stellar-mass black holes are only about ten times heavier. The team used data from telescopes in America, Australia, India, South Africa, and space to observe tidal disruption events.

Tidal disruption events occur when a star passes close to a supermassive black hole and gets torn apart by intense gravitational forces. This allows scientists to study how the black hole behaves after consuming a large amount of material. The researchers combined data from multiple wavelengths, including optical light, ultraviolet light, X-rays, and radio waves.

The team's focus was on understanding why some supermassive black holes launch jets immediately after tearing apart a star, while others remain dormant for months or even years before firing up their jets. To answer this question, they examined twenty tidal disruption events and narrowed the sample to ten high-quality events.

The analysis revealed two separate periods when jets can form. The first occurs early in the feeding cycle, while the black hole is consuming material at an extremely high rate. The second appears much later, hundreds to thousands of days after the star was initially torn apart.

Why It Matters

This discovery helps scientists understand how supermassive and stellar-mass black holes behave, which can affect the evolution of galaxies. It also shows that these cosmic objects follow a universal rule, regardless of their size.

Key Facts

• A team of astronomers discovered that black holes of all sizes follow the same rule when launching powerful jets.
• The study found that supermassive and stellar-mass black holes launch jets at the same critical stage, regardless of their size.
• Tidal disruption events occur when a star passes close to a supermassive black hole and gets torn apart by intense gravitational forces.
• The researchers combined data from telescopes in America, Australia, India, South Africa, and space to observe tidal disruption events.
• The study was published in Nature Astronomy on September 17, 2026.

Key Terms

Tidal Disruption Event

When a star passes close to a supermassive black hole and gets torn apart by intense gravitational forces

Eddington Limit

The point at which the outward pressure of radiation balances the inward pull of gravity

Implications

This discovery helps scientists understand how supermassive and stellar-mass black holes behave, which can affect the evolution of galaxies. It also shows that these cosmic objects follow a universal rule, regardless of their size.