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Did An 8th Century Gamma Ray Burst Irradiate Earth?
Science Daily ^ | 1-21-2013 | Science Daily

Posted on 01/21/2013 7:50:06 AM PST by blam

Did An 8th Century Gamma Ray Burst Irradiate Earth?

Science Daily
January 21,2013

A nearby short duration gamma-ray burst may be the cause of an intense blast of high-energy radiation that hit the Earth in the 8th century, according to new research led by astronomers Valeri Hambaryan and Ralph Neuhӓuser.

The two scientists, based at the Astrophysics Institute of the University of Jena in Germany, publish their results in the journal Monthly Notices of the Royal Astronomical Society.

In 2012 scientist Fusa Miyake announced the detection of high levels of the isotope Carbon-14 and Beryllium-10 in tree rings formed in 775 CE, suggesting that a burst of radiation struck the Earth in the year 774 or 775. Carbon-14 and Beryllium-10 form when radiation from space collides with nitrogen atoms, which then decay to these heavier forms of carbon and beryllium. The earlier research ruled out the nearby explosion of a massive star (a supernova) as nothing was recorded in observations at the time and no remnant has been found.

(snip)

(Excerpt) Read more at sciencedaily.com ...


TOPICS: Astronomy; Science
KEYWORDS: 774ad; 775ad; ad774; ad775; beryllium10; blast; carbon14; catastrophism; charlemagne; charlemagneevent; cme; cmes; coronalmassejection; cosmic; earth; fusamiyake; gammaray; gammarays; godsgravesglyphs; ralphneuhauser; valerihambarya; valerihambaryan
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To: blam
Astronomers could also look for the merged object, a 1200 year old black hole or neutron star 3000-12000 light years from the Sun but without the characteristic gas and dust of a supernova remnant.

Pretty big patch of sky to look in.

41 posted on 01/21/2013 1:30:51 PM PST by The Cajun (Sarah Palin, Mark Levin......Nuff said.)
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It's been ages since a posting of recent adds to the Catastrophism keyword (minus the current topic; sorted newest to oldest):
42 posted on 01/21/2013 2:59:44 PM PST by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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link only, crap from Plait
http://www.slate.com/blogs/bad_astronomy/2013/01/21/earth_hit_by_a_gamma_ray_burst_did_a_cosmic_blast_hit_us_in_775_ad.html


43 posted on 01/21/2013 4:28:01 PM PST by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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To: SunkenCiv
"...the Universe is a dangerous place...."

Yep, be careful out there.

44 posted on 01/21/2013 4:58:15 PM PST by Paladin2
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To: DBrow

I thought spallation was only caused by impact of momentous particles. (That is, not including photons.) You knock a nucleus on the front, and, Newton’s Cradle style, a neutron pops out the back. (Which in any case is different from star formation which completely blows the nucleus apart. )


45 posted on 01/21/2013 6:11:57 PM PST by coloradan (The US has become a banana republic, except without the bananas - or the republic.)
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To: Michael Barnes
yup...These threads (and the space/science threads) used to be fantastic on FR. These days, only the wannabe comediennes show up with the same tired posts.

Agreed. It could be that many of the science experts on FR found science forums to post.

46 posted on 01/21/2013 6:16:50 PM PST by MinorityRepublican
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To: SunkenCiv

SunkenCiv,

How do you manage to have all of those posts saved up?


47 posted on 01/21/2013 6:18:48 PM PST by MinorityRepublican
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To: coloradan

Photons can do it too. With photoneutrons, you get neutrons, with spallation by photons you can get bigger particles. Takes an energetic photon.


48 posted on 01/21/2013 6:39:42 PM PST by DBrow
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To: blam

49 posted on 01/21/2013 6:42:22 PM PST by dfwgator
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To: Sideshow Bob

Ye Hulke Smasheth!


50 posted on 01/21/2013 7:57:34 PM PST by Tanniker Smith (Rome didn't fall in a day, either.)
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To: Bratch
A nearby short duration gamma-ray burst may be the cause...

That's legitimate language, for a scientist. Scientists are trying to make sense out of things that no one knows about, and realize their interpretations could be wrong. So they're very hesitant to speak as if their interpretation of the data is the only possible interpretation. Thus, you will always see scientists using what I call "hedge" language--might, could, possibly.

51 posted on 01/21/2013 8:16:11 PM PST by exDemMom (Now that I've finally accepted that I'm living a bad hair life, I'm more at peace with the world.)
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To: MinorityRepublican

I didn’t, I compiled them today, did a search ‘n’ replace on the source.

I’ve GOT to get my fire-and-forget programs moved over and translated to the new OS, they used to do all the work for me.


52 posted on 01/21/2013 8:16:34 PM PST by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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