Theories on gamma ray bursts?

[sanctus]

I was just wondering what are the current theories to explain gamma ray bursts? And which do you feel is the most promising?

[M.J.]

Woah, I completely forget this theory about them on this show there, they explained a theory and it was pretty neat, then again I was only a 6th grader back then *I'm a 10th grader now) so I really can't remember much.

 

They say that if a gamma ray burst were to happen near Earth, it might like like blinding light and then everything would just heat up and Earth will become a molten rock again.

 

That's all I can say >>'

If I find anything, I'll leave you another post :]

[sanctus]

Actually a search on wikipedia answered a little my question, there are most theories explained. This burts are something really crazy!

 

Thanks, for the info, I didn't think about that. So the question is will earth be destroyed by our sun becoming a supernova or by a gamma ray burst? I think it will more probably be the former, seen the frequency of those bursts (if I remember well it was something like 1 every 100000 years per galaxy)

[Pluto]

Hello All

 

Gamma Ray bursts

 

Gamma-ray bursts: Introduction to a Mystery

 

What , how and where?

 

Gamma-ray Burst FAQ

 

Map

Gamma-ray Burst Real-time Sky Map

 

Data

Gamma-ray Bursts

 

 

With images

Gamma-rays

 

Cosmological Gamma-Ray Bursts and Hypernovae Conclusively Linked

Clearest-Ever Evidence from VLT Spectra of Powerful Event

ESO - 2003

[M.J.]

So the question is will earth be destroyed by our sun becoming a supernova or by a gamma ray burst? I think it will more probably be the former, seen the frequency of those bursts (if I remember well it was something like 1 every 100000 years per galaxy)

 

Good point there! :]

We would have to research when was the last time that there was a gamma ray burst in the Milky Way.

These things are so fascinating, it makes your head go in circles just thinking about them :D

[M.J.]

Hello All

 

 

Hello! :]

Thanks for all those links and info on gamma ray bursts :D

[Pluto]

Hello All

 

Every few hundred million years our solar system passes through a nebulae, this would be one of the main dangers to earth.

[Hill]

Every few hundred million years our solar system passes through a nebulae, this would be one of the main dangers to earth.

 

The problem being that the nebula may cause perturbations in the orbits of bodies in the Oort Cloud, sending some out of the influence of the Sun and sending others toward the inner Solar System. The likelihood of Earth being struck thus would increase for the duration of the passage.

 

As the sun orbits the Milky Way every 230 million years it passes through denser material in the arms. It also moves above and below the galactic plane. Those denser areas is where it is likely to encounter more material. It is also more likely to be near a supernova at those times.

 

http://upload.wikimedia.org/wikipedia/commons/thumb/1/1d/Milky_Way_Arms.svg/614px-Milky_Way_Arms.svg.png

Source: Wikipedia

 

More about he Sun's movement through the Milky Way. Curious About Astronomy: How often does the Sun pass through a spiral arm in the Milky Way?

[Moontanman]

I thought Gamma Ray bursts had pretty much been explained as the flash of gamma rays that leave the poles of a star as it turns into a black hole. you have to be in direct line of sight with one of the poles to be irradiated. The gamma rays don't go in all directions like they first thought. that would have violated Einstiens matter energy conversion theory for a star to put out that much energy in all directions at once.

 

Michael

[Nootropic]

Scientific American has an excellent book on a collection of astronomy-related articles, and one of the articles I read it in discussed magnetars as a possible source of gamma ray bursts. Compared to exploding black holes, I found this a bit more promising.

 

Magnetar - Wikipedia, the free encyclopedia

[Moontanman]

Scientific American has an excellent book on a collection of astronomy-related articles, and one of the articles I read it in discussed magnetars as a possible source of gamma ray bursts. Compared to exploding black holes, I found this a bit more promising.

 

Magnetar - Wikipedia, the free encyclopedia

 

That's probably correct, it has been a long time since I read the artical. the main thing is that the radiation isn't spread out in all directions but just at the poles so to be affected at a great distance you have to be in ditrect line with one of the poles. If you are and you are close enough then it's good bye!

 

Michael

[Pluto]

Hello All

 

More info on Neutron Stars

 

1992ApJ...392L...9D Page L9

 

Gamma ray bursts are released from most compacted cores, even the lighter cores will sometime burst.

 

A brown dwarf joins the jet-set

 

Jets of matter have been discovered around a very low mass 'failed star', mimicking a process seen in young stars. This suggests that these 'brown dwarfs' form in a similar manner to normal stars but also that outflows are driven out by objects as massive as hundreds of millions of solar masses down to Jupiter-sized objects.

 

BBC NEWS | Science/Nature | Dwarf stars emit powerful pulse

 

The brown dwarfs are behaving like an altogether different and exotic cosmic object called a pulsar.

 

 

Chandra Press Room :: Chandra Captures Flare From Brown Dwarf :: July 11, 2000

 

The first flare ever seen from a brown dwarf, or failed star, was detected by NASA's Chandra X-ray Observatory. The bright X-ray flare has implications for understanding the explosive activity and origin of magnetic fields of extremely low mass stars.

[Moontanman]

I guess I should have posted it here but this months New Scientist magazine has an article that postilates that gamma ray bursts are evedence of time travelers using sigularities to travel back and forth through time.

 

Michael

[dellcom]

Actually a search on wikipedia answered a little my question, there are most theories explained. This burts are something really crazy!

 

Thanks, for the info, I didn't think about that. So the question is will earth be destroyed by our sun becoming a supernova or by a gamma ray burst? I think it will more probably be the former, seen the frequency of those bursts (if I remember well it was something like 1 every 100000 years per galaxy)

 

The sun will not super nova as its mass is not sufficient enough. It will just shed its outer layers, creating a planetary nebulae. The earth will still be destroyed by this process though.

 

However i do think it is an interesting fate that our planet could be wiped out because of a GRB, there would be absolutely no warning. One moment its 85 degrees and sunny, the next the oceans boil off and the earth becomes molten again. but like you stated the odds are incredibly low (guess ill just have to die of old age)

[Mike C]

I was just wondering what are the current theories to explain gamma ray bursts? And which do you feel is the most promising?

 

My solution to this problem is that the source of these 'bursters' is the 'neutron' stars decaying to their original beginning from hydrogen.

 

I remember reading that these 'bursters are 'high velocity protons'.

So I concluded that the only source would be the neutron stars.

 

If these bursters are hitting our planet that constitutes a very small target in this vast universe, than there must be hundreds of billions of trillions in number throughout our vast universe.

 

So this is evidence that stars are fused from Hydrogen clouds and are

decaying again from the neutron stars to complete the recycling process of stars.

 

Mike C