The event horizon of a black hole is a spherical or spheroidal region from which nothing, not even ... [+] light, can escape. But outside the event horizon, the black hole is predicted to emit radiation. Hawking's 1974 work was the first to demonstrate this, and it was arguably his greatest scientific achievement.
The mass of a black hole is the sole determining factor of the radius of the event horizon, for a ... [+] non-rotating, isolated black hole. For a black hole of ~1 solar mass, its event horizon would be about 3 kilometers in radius.
Other things to check out:
Scientists: 'Photon Ring' Stacking Will Create Ultra-Sharp Black Hole Photos
“The image of a black hole actually contains a nested series of rings,” Johnson tells IFLScience. “Each successive ring has about the same diameter but becomes increasingly sharper because its light orbited the black hole more times before reaching the observer. With the current EHT image, we’ve caught just a glimpse of the full complexity that should emerge in the image of any black hole.”
The EHT that Johnson refers to is the Event Horizon Telescope, a collection of telescopes scattered across the globe that combine their observations to form what is essentially an Earth-size telescope capable of imaging black holes.
The Black Hole | Garden City News
Once again it's time to feed the Black Hole, you feed the Black Hole by pouring tax payer's money down it.
Harvard Physicists Refine Images of Black Hole | News | The Harvard Crimson
A team led by scientists at the Harvard Black Hole Initiative published an article Wednesday outlining a method to simulate sharper images of a black hole.
The article was published in the peer-reviewed academic journal Science Advances. It comes less than a year after the Event Horizon Telescope, a collaborative network of telescopes around the Earth, visualized a black hole for the first time.
Physics professor Andrew E. Strominger '77, the Black Hole Initiative's assistant director of theory and a core collaborator on the paper, emphasized the theoretical motivation for studying black holes in this paper.
Quite a lot has been going on:
Property Owners Face £2B Black Hole As Tenants Don't Pay Rent Bills
The scale of the issue facing landlords and tenants as the coronavirus brings the economy to a halt began to emerge on Thursday, as property companies reported on just how much rent tenants did not pay when it came due this week.
Listed shopping centre REIT Intu said in a market update that it had received just 29% of the rent owed by its tenants on quarter day, 25 March, the day UK commercial tenants pay their quarterly rent in advance. On the same day last year, it received 77% of the rent it was owed, the company said.
Astronomers Propose New Mechanism for Growth of Supermassive Black Hole Seeds | Astronomy |
In a paper published in the Astrophysical Journal , a team of astronomers in Italy proposes that heavy seeds of supermassive black holes formed via the migration and merging of stellar compact remnants (neutron stars and stellar-mass black holes) in early-type galaxies.
* * *
Black holes are objects so dense that not even light can escape their gravity, although powerful jets of light and energy can be emitted from a black hole's vicinity as gas and stars are sucked into it.
Data blackhole in Q1 2020 would challenge govt policymaking and corporate decisions - The
How Researchers Produce Sharp Images of a Black Hole - Universe Today
In April of 2019, the Event Horizon Telescope collaboration history made history when it released the first image of a black hole ever taken. This accomplishment was decades in the making and triggered an international media circus. The picture was the result of a technique known as interferometry, where observatories across the world combined light from their telescopes to create a composite image.
This image showed what astrophysicists have predicted for a long time, that extreme gravitational bending causes photons to fall in around the event horizon, contributing to the bright rings that surround them. Last week, on March 18th, a team of researchers from the Harvard-Smithsonian Center for Astrophysics (CfA) announced new research that shows how black hole images could reveal an intricate substructure within them.
No comments:
Post a Comment