Giant, magnetized outflows from our galactic center

Jan 28, 2013
A false-color image of our Milky Way as seen in a projection that shows the galactic center at the center of the image, the plane of the galaxy stretching across the central band, and the two arc-shaped radio lobes of emission seen extending north and south of the plane. Several of the newly discovered magnetic structures are labeled. Credit: Carretti et al., and Nature

(Phys.org)—Two years ago, CfA astronomers reported the discovery of giant, twin lobes of gamma-ray emission protruding about 50,000 light-years above and below the plane of our Milky Way galaxy, and centered on the supermassive black hole at our galaxy's core. The scientists argued then that the bubbles were produced either by an eruption from the black hole sometime in the past, or else by a burst of star formation in that vicinity.

It now appears that these giant bubbles of hot gas can be seen at radio wavelengths as well. Writing in the new issue of the journal Nature, CfA astronomer Gianni Bernardi and eight of his colleagues describe finding humongous lobes of emanating from the Galactic Center. Moreover, the emission is polarized, a general property that can have; some sunglasses take advantage of the fact that reflected sunlight becomes polarized. In the case of , the explanation for polarization is the presence of strong magnetic fields.

The scientists calculate that the radio lobes, which closely match the gamma-ray lobes in overall dimensions but which contain three ridge-like substructures, are probably polarized by the presence of strong magnetic fields that extend out of the galactic plane in both directions for tens of thousands of light-years, and which contain an energy roughly equivalent to the total current output of the Sun for a time equal to the lifetime of the universe. They argue that the activity is driven by star-formation activity, rather than black-hole activity, and that it originates in a region around the Galactic Center about 650 light-years in size. Not least, the scientists argue that the ridges seen in the magnetically-shaped outflow are the result of several episodes of star-formation that constitute a phonograph-like record of star formation in this region over at least the past ten million years.

Explore further: 'Eye of Sauron': Using supermassive black holes to measure cosmic distances

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rubberman
2.3 / 5 (4) Jan 28, 2013
Closer and closer...doubtful of their assertion that it is created by star forming activity though. A field like this wouldn't be generated by multiple small sources...the range is too great.
Tuxford
1.5 / 5 (8) Jan 28, 2013
The ridges are more likely due to the cyclic nature of the core star, producing superwave cosmic ray outbursts as LaViolette contends. But then, such outbursts would deny the Black Hole singularity nonsense and the Huge Bang Fantasy. And no astronomer hoping for a successful career can make such an assertion.
HannesAlfven
1.9 / 5 (9) Jan 28, 2013
There's simply far too much effort here by far too many people to dissociate magnetic fields from electric currents. People would be wise to read Gerrit Verschuur's "The Invisible Universe" -- where he goes into the history of the discovery of cosmic radio waves. There was initially incredible resistance to acceptance that they even existed, based upon the cosmological beliefs at the time.

When one includes the history of science in their analysis, and focuses upon the surprises rather than the official textbook story, the big picture of the changes in cosmology become fairly clear. But, for those who refuse to look beyond mainstream notions, it will always appear that there are no consistent paradigm-level changes happening at all.

Our culture has become fascinated with the answers-focused approach to science (positivism), but this is creating an incredible vacuum in theory which a handful are now realizing: If we wish, we can now build a cosmology based upon electromagnetism.
Shinichi D_
4.5 / 5 (8) Jan 28, 2013
The ridges are more likely due to the cyclic nature of the core star, producing superwave cosmic ray outbursts as LaViolette contends. But then, such outbursts would deny the Black Hole singularity nonsense and the Huge Bang Fantasy. And no astronomer hoping for a successful career can make such an assertion.


If you could prove your point with the scientific method, you would become the most successful astronomer in human history.
katesisco
1 / 5 (3) Jan 28, 2013
Well, from a layman's point of view, I see these 'ridges' as the 'rings' blown by a star in its progress toward nova. Such as what happened in the LMC 1987A which, as we all know, took another 12,000 y before getting a gas bath, turning bright blue and racing in 1,000 y toward nova.
Yes, this is a galactic center which as we know does not go boom but jets. So, are these residual jets? Yes. Not very energetic ones at that. I see the 2 choices for source as one in the same. Star forming? that is due to gas --gas seepage from the bh. Are gas clouds that are incoming to blame? Isn't the magnetism a property of the bh? These stars would have to be set off in firecracker succession continually to produce this much energy. This bh exhaust is due to its magnetic field holding the gas failing. Spintronics may explain this. It will pour over our galaxy like syrup over pancakes.
And then chill out as molecular hydrogen. Contrary to MW gas clouds were once superbubbles (wired.com
typicalguy
4 / 5 (4) Jan 28, 2013
It's called a quasar. Why is this even a debate?
vidyunmaya
1 / 5 (2) Jan 29, 2013
Sub: From Milkyway to heart of Universe
The above data twin lobes of gamma-ray emission protruding about 50,000 light-years above and below the plane of our Milky Way galaxy,

More detailed logscale projections are available
COSMOS YOGA SERIES-I-TAMASOMA JYOTHIRGAMYAM-A SEARCH BEYOND DARK MATTER REGN .NO:TXU 1-282-571 D/June,27, 2005
ISBN : 978-93-82184-13-3 Contact Author-Printed/CD
andHEART OF THE UNIVERSE-THE SCIENCE IN PHILOSOPHY-COSMOS YOGA VISION SERIES II-Nov 2006-REGN.NO:TXU 1-364-245 d/-JAN 8,2007
ISBN : 978-93-82184-15-7 Contact Author
Milkyway Sensitive Index is part of Cosmolgy Vedas Interlinks
http://vidyardhic...pot.com/

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