Black Hole

A black hole can launch a powerful relativistic jet after it tidally disrupts a star. If this jet fortuitously aligns with our line of sight, the brightness is Doppler boosted by several orders of magnitude. Consequently, such on-axis relativistic tidal disruption events have the potential to unveil cosmological quiescent black…

Earlier this year, the European Southern Observatory’s Very Large Telescope (ESO’s VLT) was alerted after an unusual source of visible light had been detected by a survey telescope. The VLT, together with other telescopes, was swiftly repositioned towards the source: a supermassive black hole in a distant galaxy that had…

The 2022 Fifa Soccer World Cup is taking place in a country land that legislates against gays and lesbians, runs its obscenely wealthy economy off fossil fuels – and whose stadiums were built on the corpses of Bangladeshi slave labour, writes Simon Reader. And various half-hearted attempts to register their…

First, radio telescopes and then X-ray telescopes operated by NASA and the European Space Agency provided observational evidence for jets and other AGN outflows. Astronomers, including Weaver, have cobbled an explanation for their genesis during the past 30 to 40 years by tying together optical, radio, ultraviolet, and X-ray evidence.…

According to scientists, the engine that powers energetic and short-lived gamma-ray bursts must always come from a newly formed black hole. However, a new study contradicts this scientific orthodoxy. The study by Dr. Nuria Jordana-Mitjans at the University of Bath suggests that some short-duration GRBs are triggered by the birth…

By: The Associated Press Posted: 5:05 AM CST Sunday, Nov. 13, 2022 Last Modified: 6:47 AM CST Sunday, Nov. 13, 2022 Print Email Save to Read Later LONDON (AP) — Britain’s Treasury chief warned Sunday of a coming spending crunch and tax increases for cash-strapped Britons as he bids to…

LONDON (AP) — Britain’s Treasury chief warned Sunday of a coming spending crunch and tax increases for cash-strapped Britons as he bids to fill the “black hole” in the country’s finances. Billing himself as a Scrooge figure ahead of Thursday’s Autumn Statement, when he will update Parliament on the government’s…

Gamma-ray bursts (GRBs) have been detected by satellites orbiting Earth as luminous flashes of the most energetic gamma-ray radiation lasting milliseconds to hundreds of seconds. These catastrophic blasts occur in distant galaxies, billions of light years from Earth. A sub-type of GRB known as a short-duration GRB starts life when…

Massive black holes (BHs) at the centers of massive galaxies are ubiquitous. However, their population in dwarf galaxies remains elusive. Identification of these systems has historically relied on detecting light emitted from accreting gaseous disks close to the black holes. Without this light, they are difficult to detect. An international…

Home News Science & Astronomy rtwork depicting a tidal disruption event (TDE). TDEs are causes when a star passes close to a supermassive black hole and get torn apart by the gravity of the latter. The debris forms a fan-shaped pattern around the black hole before eventually falling in. (Image…