If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Registered Member #190
Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567
I recently read an article that some physicists don't think black holes stay in existence too long. That is, black holes do not exist. Everyday, though, I keep hearing the physics community talk about black holes.
Is this reference legit? The article says the journal is NOT peer reviewed, so I can only guess there is something fishy here.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Hmm. Geometric solutions that do not take into account turbulence and asymmetry are mathematically correct but not always consistent with real world physics.
That said, neutron stars have been revealed to have internal structure going down to the subatomic level so it is possible black holes actually do have internal geometry that isn't visible from the outside of the event horizon.
Current consensus is, that black holes don't live forever and decay by Hawking radiation. That is a _very_ slow process for massive black holes, e.g. on the order of 10^60 years. This doesn't imply, that they don't exist. The problem of information loss is circumvented by postulating, that the Hawking radiation contains the "lost" information. There are huge theoretical problems, though, of getting quantum mechanics to be consistent with general relativity.
Life time of miniature black holes is predicted to be much shorter. This has been one of the arguments, why hypothetically produced mini holes by the large hadron collider would evaporate a long time before they could accrete more mass to become dangerous.
Registered Member #42796
Joined: Mon Jan 13 2014, 06:34PM
Location:
Posts: 195
Uspring wrote ...
hypothetically produced mini holes by the large hadron collider would evaporate a long time before they could accrete more mass to become dangerous.
back then when it was a hot topic someone calculated that such a black hole ignoring the very very short life would take 10k - 100k years of swallowing enough matter to become dangerous
Registered Member #2529
Joined: Thu Dec 10 2009, 02:43AM
Location:
Posts: 600
I strongly suspect that the research isn't complete.
The current understanding of black holes seems to be shifting from:
a black hole forms -> event horizon + singularity at the centre
to:
a black hole forms -> firewall forms + flat spacetime inside that
They would both look the same from the outside, but if you fell in, you would hit the firewall (consists of Hawking radiation, and similar) and get fried and spread over the surface of the black hole and the black hole would get a bit bigger.
The thing that hasn't been worked out yet is how the firewall forms and exactly how it stays stable, but this seems to be the only really workable explanation of the known physics and observations right now. But there's no consensus yet, and this paper is part of physicists trying to work it out.
The thing that hasn't been worked out yet is how the firewall forms and exactly how it stays stable, but this seems to be the only really workable explanation of the known physics and observations right now.
don't seem to reconcile. Nobody has been in a black hole.
Registered Member #65
Joined: Thu Feb 09 2006, 06:43AM
Location:
Posts: 1155
Any rational explanation is plausible without falsifiable assertions. However, most of these theories will never be scientifically accurate without experimental or observational proof. While Hawking radiation emissions have been observed, it still does not prove the underlying phenomena match speculative models.
Some of Hawking's work is reminiscent of this fellow: “Distortion of Truth by Associationâ€
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
black holes...again
