Highest Energy Cosmic Rays Linked to Violent Black Holes


by ZapperZ
Tags: black, cosmic, energy, holes, linked, rays, violent
ZapperZ
ZapperZ is offline
#1
Nov8-07, 02:44 PM
Mentor
ZapperZ's Avatar
P: 28,801
In case people hasn't seen the big news of the day (or technically, the big news of tomorrow when the issue of Science officially comes out), the Pierre Auger observatory collaboration has finally come out with its first major result.

I am not in this field of study, but I am involve with it via the AirFly collaboration. We provide to Auger, among other things, the energy calibration of the fluorescent signal that they are detecting from electrons moving through air/N2 at different pressures.

I'm glad the news embargo on this is now over, so I can tell people now! :)

Zz.
Phys.Org News Partner Science news on Phys.org
Going nuts? Turkey looks to pistachios to heat new eco-city
Space-tested fluid flow concept advances infectious disease diagnoses
SpaceX launches supplies to space station (Update)
starkind
starkind is offline
#2
Nov8-07, 03:14 PM
P: 182
Thanks Z.

If only Dr. Chou had finished his presentation a few minutes earlier, I might have scooped you on this. Oh well. My summary of Dr. Chou's presentation will be posted, I hope, later today.

S
ZapperZ
ZapperZ is offline
#3
Nov8-07, 03:21 PM
Mentor
ZapperZ's Avatar
P: 28,801
He gave a seminar at Argonne last week. I could have scooped everyone back then. But he announced that there was an embargo till the Science publication. So I respected that. Besides, I already had a clue on what the result was through a few of our collaborators.

BTW, did he still mention about needing the absolute energy calibration from AirFly? That paper is being written as we speak.

Zz.

ZapperZ
ZapperZ is offline
#4
Nov8-07, 04:00 PM
Mentor
ZapperZ's Avatar
P: 28,801

Highest Energy Cosmic Rays Linked to Violent Black Holes


Just for reference, this was the paper we recently published that Auger used in one of their calibration.

http://www.sciencedirect.com/science...47a0f44b279c51

This does not have the absolute energy calibration yet. That one is still being worked on, and there's talk that AirFly will be flying back to our facility to expand their studies, including doing the fine details on their measurements.

Zz.
Chris Hillman
Chris Hillman is offline
#5
Nov8-07, 04:10 PM
Sci Advisor
P: 2,341
Quote Quote by ZapperZ View Post
I'm glad the news embargo on this is now over, so I can tell people now! :)
Exciting news indeed, although--- now that it has happened--- not unexpected!
ZapperZ
ZapperZ is offline
#6
Nov8-07, 04:33 PM
Mentor
ZapperZ's Avatar
P: 28,801
BTW, and this is where I can't help myself to take a swipe at those people who are so afraid of places like RHIC and LHC creating "black holes" in their collisions, if you notice the energy scale of the cosmic particles that they're talking about here, they are in the hundreds of TeV, significantly higher than what LHC would get on its best days. This clearly implies that there are particle with energy in the hundreds of TeV undergoing collisions a gazillion times a second all over the neighborhood of our Earth. If such energetic collisions can have an appreciable probability of creating a black hole that can harm our world, we would have been gone already by now.

Considering that both RHIC and LHC are nowhere near such energy scale, and their collision luminosity is awfully puny when compare to the rate happening all over our immediate neighborhood, one can immediately see why such black hole scenario is utterly irrelevant.

Zz.
cristo
cristo is offline
#7
Nov9-07, 01:18 PM
Mentor
cristo's Avatar
P: 8,287
I attended a seminar by Prof Subir Sarkar from Oxford last week entitled "Seeing the High Energy Universe Through Cosmic Rays." At the end he said to look out in this weeks Science for their discoveries, as he couldn't tell us then. Anyway, it's interesting news!
Count Iblis
Count Iblis is offline
#8
Nov9-07, 02:14 PM
P: 2,159
Quote Quote by ZapperZ View Post
BTW, and this is where I can't help myself to take a swipe at those people who are so afraid of places like RHIC and LHC creating "black holes" in their collisions, if you notice the energy scale of the cosmic particles that they're talking about here, they are in the hundreds of TeV, significantly higher than what LHC would get on its best days. This clearly implies that there are particle with energy in the hundreds of TeV undergoing collisions a gazillion times a second all over the neighborhood of our Earth. If such energetic collisions can have an appreciable probability of creating a black hole that can harm our world, we would have been gone already by now.

Considering that both RHIC and LHC are nowhere near such energy scale, and their collision luminosity is awfully puny when compare to the rate happening all over our immediate neighborhood, one can immediately see why such black hole scenario is utterly irrelevant.

Zz.


Perhaps one can invent a theory that will lead to the formation of black holes only if the collision takes place in the immediate vicinity of massive bodies, e.g. by invoking Chameleon Fields in some way.
ZapperZ
ZapperZ is offline
#9
Nov9-07, 04:02 PM
Mentor
ZapperZ's Avatar
P: 28,801
Then one has to explain why there are no black holes next to the sun, Jupiter, Neptune, etc.. etc.

Zz.


Register to reply

Related Discussions
Black Holes, how much energy do they give off? Astrophysics 24
Could ultra high-energy cosmic rays be the result of matter-antimatter collision? Astrophysics 4
Cosmic rays Cosmology 6
Cosmic rays and the EMS General Astronomy 3
Dental X-rays linked to small babies Biology 4