Tag: black

“Heaviest Black Hole Collision” Detected by Gravitational Waves Might Actually Be a Boson Star Merger

Artistic representation of a collision of two boson stars, together with the gravitational waves emitted. Credit: Nicolás Sanchis-Gual and Rocío García-Souto An international team of scientists led by the Galician Institute of High Energy Physics and the University of Aveiro, including an undergraduate from the Department of Physics at The Chinese University of Hong Kong […]

Read More

Origin of Supermassive Black Holes? –“Dark-Matter Centers of the Early Galaxies”

A new theoretical study has proposed a natural explanation for how supermassive black holes –once described as “the most perfect macroscopic objects in the universe, the only elements in their construction are our concepts of space and time” –formed in the early Universe. The proposal is the existence of stable galactic cores –made of dark […]

Read More

Cygnus X-1 was the First Black Hole Ever Found. New Measurements Show it’s Much More Massive Than Previously Believed

In 1964 two Aerobee suborbital rockets were launched with the goal of mapping x-ray sources in the sky. Each rocket contained a directed Geiger counter, so that as the rocket rotated at the peak of its trajectory to measure the direction of x-ray sources. The project discovered eight x-ray sources, including a particularly bright one […]

Read More

New Research Finds That Supermassive Black Holes Could Form From Dark Matter

Turbulent disk of gas churning around a black hole. Credit: NASA’s Goddard Space Flight Center/Jeremy Schnittman A new theoretical study has proposed a novel mechanism for the creation of supermassive black holes from dark matter. The international team find that rather than the conventional formation scenarios involving ‘normal’ matter, supermassive black holes could instead form […]

Read More

Scintillating discovery: These distant ‘baby’ black holes seem to be misbehaving — and experts are perplexed

This article was originally published at The Conversation. The publication contributed the article to Space.com’s Expert Voices: Op-Ed & Insights. Kathryn Ross, PhD Student, Curtin University Natasha Hurley-Walker, Radio Astronomer, Curtin University Radio images of the sky have revealed hundreds of “baby” and supermassive black holes in distant galaxies, with the galaxies’ light bouncing around in unexpected ways. […]

Read More

A map of 25,000 Supermassive Black Holes Across the Universe

The Low-Frequency Array (LOFAR) is a different kind of radio telescope. Although radio light has the longest wavelengths and lowest frequencies of the electromagnetic spectrum, much of radio astronomy has focused on the higher frequency end. Observatories such as ALMA study radio light at frequencies of hundreds of Gigahertz, and the VLA studies the fifty […]

Read More

Unknown Milky Way Signal –“A Gravitational Wave, Cosmic String, or Primordial Black Hole?”

In 1993 Stephen Hawking proposed in Black Holes and Baby Universes that there might be “primordial black holes which were formed in the early universe that could be less than the size of the nucleus of an atom, yet their mass could be a billion tons, the mass of Mount Fuji. A black hole weighing […]

Read More

‘Ghostly’ neutrino from star-shredding black hole reveals cosmic particle accelerator of epic proportions

A ghostly particle that smashed into Antarctica in 2019 has been traced back to a black hole tearing apart a star while acting like a giant cosmic particle accelerator, a new study finds. Scientists investigated a kind of subatomic particle known as a neutrino, which is generated by nuclear reactions and the radioactive decay of […]

Read More

Ghost Particle From Star Shredded by Black Hole Reveals Cosmic Particle Accelerator

A team of scientists has detected the presence of a high-energy neutrino — a particularly elusive particle — in the wake of a star’s destruction as it is consumed by a black hole. This discovery, reported in the journal Nature Astronomy, sheds new light on the origins of Ultrahigh Energy Cosmic Rays — the highest […]

Read More

Astronomers find the fastest spinning black hole to date

Six decades after its discovery, the first black hole ever detected is still causing astronomers to scratch their heads. It turns out that the cosmic behemoth at the heart of the Cygnus X-1 system is 50% more massive than previously thought, making it the heaviest stellar-mass black hole ever observed directly. Based on new observations, […]

Read More