|
|
#1 |
|
Banned
|
Astronomers have detected an unusual, powerful burst of intermittent radio waves emanating from the direction of the center of our galaxy.
Now the search is on to trace the source of the mystery radio bursts, or at least find more like it. Was it a dying star "burping" its last radio emissions?The discovery "will cause a stampede of further observations," write astronomers Shri Kulkarni and Sterl Phinney in the March 3 issue of the science journal Nature. They're in the Division of Physics, Mathematics, and Astronomy at the California Institute of Technology in Pasadena. Or is there something out there completely new to science? Astronomer Scott Hyman of Sweet Briar College in Virginia helped make the discovery while observing the center of the Milky Way through radio telescopes set at various wavelengths. The galaxy is full of objects that emit radio waves, including black holes and stars of various kinds. But the cause of this particular burst of radio waves has astronomers scratching their heads. "The most spectacular aspect of this is that five bursts occurred at regular intervals of about an hour and a quarter [77 minutes]," Hyman said. "They were at a constant intensity and each burst had basically the same time profile." Each burst lasted about ten minutes. Hyman and colleagues reported their findings in this week's Nature. Transient radio emissions are not particularly unusual. They generally occur, at many different wavelengths, in conjunction with large releases of energy such as occur during deaths of stars. Binary systems featuring black holes or neutron stars emit radio and x-ray bursts, while supernovas emit over the entire electromagnetic spectrum. But short-lived radio bursts are rarely detected, because radio telescopes, until recently, have only been able to focus on a relatively small area of the sky in each observation. "We need a different way of building telescopes," Kulkarni said. "Now we have very sensitive instruments, but they have tunnel vision. They are good when you know what you want to see but not so good [for looking] at a large piece of sky and being ready to pounce on something." Kulkarni added that discoveries like Hyman's could galvanize astronomers to press on with the development of more "wide sky" radio instruments. Hyman's team was able to achieve a considerably wider sky view than other astronomers have. "If we found this by just scratching the surface, imagine what's lurking out there," he said. "We may uncover many additional types of lower-energy-radio transient sources." |
|
|
|
|
#2 |
|
Retired BOSS
|
If you are just going to copy and paste a news article, don't plagerize it. Post the link. Also, what is the point of just posting the article?
__________________
RIP |
|
|
|
|
#3 |
|
FFR Player
Join Date: Jun 2004
Posts: 37
|
March 3 issue of the science journal Nature (enought not to be plagiarism)
__________________
|
|
|
|
|
#4 |
|
Retired BOSS
|
No, not really. That is sourcing the 1 quote in the 2nd paragraph. What about the rest of the article? I'd imagine that the rest of the article is from a different source if in the article they are quoting another source's article.
And, that wasn't the point I was making. My point is that I'm sick of people making threads in CT that have no critical thinking in them. Where are the ideas, questions, or inane theories from falcon to spur the rest of us into debate. CT is about the WHY. Not the what.
__________________
RIP |
|
|
|
|
#5 |
|
Banned
|
well i had to get to school and usually the artical is gone by then so i copid and pasted.
|
|
|
|
|
#6 |
|
let it snow~
|
...
Articles don't "leave". They stay forever. They are amended and edited, and may even be updated with a link to a new article relating to it, but they don't get deleted. Cite your sources, please. Even though I don't care at all about what you "copid and pasted", I still want to see how reliable the source is. ~Squeek Edit - olol it wuz hard 2 find - http://news.nationalgeographic.com/n...tic_radio.html |
|
|
|
|
#7 |
|
Banned
|
um it was on aol news and its gone now
|
|
|
|
|
#8 |
|
(The Fat's Sabobah)
|
I say, how grand an article.
I say, how grand a discussion. |
|
|
![]() |
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
|
|