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Old 04-October-2008, 04:46 PM
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It is consistent with Arps model. Possible, but not expected using the standard model (according to the authors). Both models could be wrong.

If this is a 'blending' of a distant and local magnetic field, it would mean the standard model assumption that galactic electromagnetic fields are 'late arrivals' is wrong. This requires a major revision in models often used in the development of galactic clusters. It has never made sense to me that complex models have ignored electric field effects for so long: It is much easier to explain structure like the great wall and spidery clusters with polar field effects in the models, rather than relying upon gravity and 'an inflationary bounce'.

Another victum of this lastest observation is the Cosmic Microwave Background. When you put strong electromagnetic fields about much more distant galactic structure, these major emf potentials can and likely will extend KZ ripples from a greatly extended range of galaxies, polluting the background. It is analogus to the visible 'glow' you can see in the general area of Chicago for hundreds of miles approaching the city - you can't separate individual cities from the general glow.
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Old 04-October-2008, 06:55 PM
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Quote:
Originally Posted by Jerry View Post
It is consistent with Arps model. Possible, but not expected using the standard model (according to the authors). Both models could be wrong.

If this is a 'blending' of a distant and local magnetic field, it would mean the standard model assumption that galactic electromagnetic fields are 'late arrivals' is wrong. This requires a major revision in models often used in the development of galactic clusters. It has never made sense to me that complex models have ignored electric field effects for so long: It is much easier to explain structure like the great wall and spidery clusters with polar field effects in the models, rather than relying upon gravity and 'an inflationary bounce'.

Another victum of this lastest observation is the Cosmic Microwave Background. When you put strong electromagnetic fields about much more distant galactic structure, these major emf potentials can and likely will extend KZ ripples from a greatly extended range of galaxies, polluting the background. It is analogus to the visible 'glow' you can see in the general area of Chicago for hundreds of miles approaching the city - you can't separate individual cities from the general glow.
Interesting point.

Basically your saying that the ripples in the CMB could have been there from the start, and mirror the original clustering (as currently thought) or that the magnetic fields of the Clusters alter the CMB, and that there is no way to really distinguish between the causes.
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Old 04-October-2008, 11:44 PM
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So what say ye?
That you've grossly over-interpreted the findings of this study and that this thread is quickly heading toward the ATM section.

If you don't want to read the journal paper, get the "lite" version of the findings from NPR's Science Friday.
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Old 05-October-2008, 12:11 AM
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Default Origin of Galactic Magnetic Fields & Intergalactic Magnetic Fields, Unknown

Quote:
In reply to SpaceMan Spiff's comment: That you've grossly over-interpreted the findings of this study and that this thread is quickly heading toward the ATM section.
Observations that cannot be explained by the standard model are not ATM.

Arp's theory and mechanism is not correct as noted in the forum. (See Arp thread in ATM.) If Arp was on the right track there are a number of changes required in that hypothesized mechanism, to explain for example observations such as the alpha forest observations or high redshift galaxies that have quasars associated with them.

The anomalous galactic and intergalactic magnetic fields may or may not be a hint to the underlying mechanism.

This review article notes there is no standard accepted mechanism that explains how galactic and intergalactic magnetic fields are created. (The magnetohydrodynamical (MHD) mechanisms, where plasma kinetic energy is converted over time to magnetic energy appears to be theoretically flawed.) This review paper includes some possible primordial hypothesized mechanisms that could create galactic and extra-galactic magnetic fields.


http://arxiv.org/abs/astro-ph/0009061

Quote:
The origin of the magnetic fields observed in the galaxies and in the clusters of galaxies is unknown. This is an outstanding problem in modern cosmology and, historically, it was the first motivation to look for a primordial origin of magnetic fields. Some elaborated magnetohydrodynamical (MHD) mechanisms have been proposed to amplify very weak magnetic fields into the μG fields generally observed in galaxies (see Sec.1.1). These mechanisms, known as galactic dynamo, are based on the conversion of the kinetic energy of the turbulent motion of the conductive interstellar medium into magnetic energy.
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Today, the efficiency of such a kind of MHD engines has been put in question both by improved theoretical work and new observations of magnetic fields in high redshift galaxies (see Sec.1.2). As a consequence, the mechanism responsible for the origin of galactic magnetic fields has probably to be looked back in the remote past, at least at a time comparable to that of galaxy formation. Furthermore, even if the galactic dynamo was effective, the origin of the seed fields which initiated the processes has still to be identified.
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Even more mysterious is the origin of magnetic fields in galaxy clusters. These fields have been observed to have strength and coherence size comparable to, and in some cases larger than, galactic fields. In the standard cold dark matter (CDM) scenario, structure formation clusters form by aggregation of galaxies. It is now understood that magnetic fields in the inter-cluster medium (ICM) cannot form from ejection of the galactic fields (see Sec.1.2). Therefore, a common astrophysical origin of both types of fields seems to be excluded. Although, independent astrophysical mechanisms have been proposed for the generation of magnetic fields in galaxies and clusters, a more economical and conceptually satisfying solution would be to look for a common cosmological origin. (My comment: Cosmological processes that create magnetic fields in the early universe.)
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Old 05-October-2008, 12:45 AM
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Seems to lend some wieght to Arp's ejection model...
How so? I didn't see any mention of ejections.

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He has a point and DID PREDICT these findings!
If you say so.
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Old 05-October-2008, 03:05 AM
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Quote:
Originally Posted by Arther Dent View Post
Seems to lend some wieght to Arp's ejection model
How does this possibly have anything to do with "Arp's ejection model?"

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So why is Arp's theory so frowned upon?
Because it's "not even wrong."

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Originally Posted by Arther Dent View Post
He has a point and DID PREDICT these findings!
I can has citation?

As to the your (and Jerry's and William's) comments on the results themselves, I'll just go with Spaceman Spiff's answer...
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Old 05-October-2008, 02:50 PM
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Even with the various source documents to hand (well, some of them; I'm still tracking down one or two), I cannot see the point you are trying to make, Arther Dent.

Would you mind writing down the steps in the logic, one by one, with direct reference to the primary sources (not press releases)?
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Old 06-October-2008, 02:47 AM
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Originally Posted by Nereid View Post
Even with the various source documents to hand (well, some of them; I'm still tracking down one or two), I cannot see the point you are trying to make, Arther Dent. Would you mind writing down the steps in the logic, one by one, with direct reference to the primary sources (not press releases)?
I get this feeling: "Something surprising to mainstream science popped up + it somehow involves quasars ==> Halton Arp is correct and redshift != distance..."

But maybe I am just paranoid.
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Old 06-October-2008, 12:38 PM
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I get this feeling: "Something surprising to mainstream science popped up + it somehow involves quasars ==> Halton Arp is correct and redshift != distance..."

But maybe I am just paranoid.
Naah. I'd say you're spot on.
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Old 06-October-2008, 07:12 PM
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Question galactic ejections

I'm not going to get into all of Arp's arguments as there is the thread Cougar indexed many moons ago, and it seemed that several points were indefensible, even though others had some merit. Not caving on indefensible points never carries much weight anywhere, as is the scientific norm.
There is however, evidence from the growing body of pulsar data, that high redshift objects with large gravitational redshifts, not just velocity derived redshifts, can reach escape velocity and more from any galaxy, whether nearby, or distant. Typical escape velocity from a galaxy runs in the hundreds of kilometers per second, depending upon the location of the the core collapse supernova relative to the central bulge....somewhere between ~250 km/sec on the periphery and 600 km/sec closer to the bulge depending on whose model you choose. The largest transverse velocities observed in pulsar surveys, and incidental measurements far exceed these values. pete


see;http://antwrp.gsfc.nasa.gov/diamond_...mb/node12.html
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Old 06-October-2008, 09:36 PM
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And what does a velocity kick of ~1000 km/s (which have been observed for neutron stars) or ~600 km/s (for "ordinary" high velocity stars in the SDSS SEGUE) have to do with redshifts >> 0.01? There is no solid measurement for the gravitational redshift on neutron stars either: not a lot of emission-lines to be found on that surface! So I'm not sure how this is relevant to either the OP, or to Arp's ideas.
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Old 07-October-2008, 01:53 PM
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Originally Posted by parejkoj View Post
And what does a velocity kick of ~1000 km/s (which have been observed for neutron stars) or ~600 km/s (for "ordinary" high velocity stars in the SDSS SEGUE) have to do with redshifts >> 0.01? There is no solid measurement for the gravitational redshift on neutron stars either: not a lot of emission-lines to be found on that surface! So I'm not sure how this is relevant to either the OP, or to Arp's ideas.
parejkoj. Doppler broadening of iron emission lines has been seen,here:http://www.spacedaily.com/reports/Ne..._Time_999.html
That anything can be ejected from a galaxy, AGN, pulsar, etc...still seems lost to lots of folks out there. pete
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Old 07-October-2008, 03:01 PM
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Originally Posted by Arther Dent View Post
[...]

Why not electricity and magnetism? Does a much better job than friction and ram pressure!

[...]
It does?

I am not aware of any papers which explain the Subaru observations of the Coma cluster in terms of "electricity and magnetism".

Would you be kind enough to provide a reference please?

Alternatively, if you are talking in general terms, would you be kind enough to provide some references (to papers published in relevant peer-reviewed journals) that model inter-galactic environments and include "electricity and magnetism"?

Oh, and would you at least acknowledge the question I asked you in an earlier post? And if you intend to have a go at answering it, please say so?
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Old 07-October-2008, 06:58 PM
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Originally Posted by trinitree88 View Post
Quote:
Originally Posted by parejkoj
And what does a velocity kick of ~1000 km/s (which have been observed for neutron stars) or ~600 km/s (for "ordinary" high velocity stars in the SDSS SEGUE) have to do with redshifts >> 0.01? There is no solid measurement for the gravitational redshift on neutron stars either: not a lot of emission-lines to be found on that surface! So I'm not sure how this is relevant to either the OP, or to Arp's ideas.
parejkoj. Doppler broadening of iron emission lines has been seen,here:http://www.spacedaily.com/reports/Ne..._Time_999.html
Although an interesting set of observations (related papers here and here), that is not gravitational redshift from the gravity at the surface of the neutron star, but rather line broadening due to the inner structure of the accretion disk. The second paper claims that they are able to put lower limits on the gravitational redshift given certain assumptions, but that is all.

So, again, what relevance does this have to objects with z >> 0.01? Particularly since those redshifts are from measurements that would not apply in the case of strong gravitational fields?

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That anything can be ejected from a galaxy, AGN, pulsar, etc...still seems lost to lots of folks out there. pete
Ummm... What? AGN and pulsars eject gas all the time, supernova remnants are known to gain large kicks from the explosion, black hole mergers can gain large kicks from asymmetric gravitational radiation... But none of these have anything to do with Arp's ideas...
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Old 09-October-2008, 02:45 PM
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AD kicked this off on 4 Oct, and clarified a point or two on 5 Oct.

No response to any posts on the points in the OP since, and since I'm selfish, specifically no response to my request (on 5 Oct).

AD added a new item on 7 Oct, but hasn't posted since; specifically, no response to my request (on 7 Oct).

What is it reasonable to infer from this?
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Old 10-October-2008, 12:19 PM
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...What is it reasonable to infer from this?

That AD posted this rather whimsically, and has no intention of trying to back it up with reasoned thought.
(or perhaps that he has misplaced his towel )

Thread closed.
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