To be fair it is one paper published in one peer reviewed journal, unless you can point me to others?
http://arxiv.org/abs/astro-ph/0409215v1.
Let's look more closely at this reference. As already noted, it states that "from the optical spectra of the QSO and the interstellar gas of NGC 7319 together, we show that it is very likely that the QSO is interacting with the interstellar gas". It also states "there are many discrete, powerful X-ray emitting sources (argued to be quasars) that lie close to the nuclei of spiral galaxies, often apparently inside the main body of the galaxy". It notes the typical separation in these studies between these objects and galaxy is 1 to 5 arc seconds, less than the separation of 8 arc seconds in this case. It goes on to say that "the fact that they are all very close to the centers of the galaxies strongly suggests that these sources are physically associated with these galaxies".
It then cites earlier studies by Radecke and Arp which showed "a strong tendency for QSOs to cluster about active spiral galaxies", noting a typical separation of the quasars and galaxies in those studies of 15-20 arc seconds. It states that "if the separations are smaller than this, there will be an even greater likelihood that the QSOs and galaxies are physically associated."
The paper specifically asks "Is the QSO behind NGC 7319?" It notes the presence of interstellar Na D1 and D2 absorption lines in the spectrum of the QSO, but says this is not unexpected since "we would still expect about half the possible optical depth of gas between the QSO and the observer. It then asks "does the color of the QSO indicate that it is inordinately reddened and therefore obscured as if it were a background object?" And they find that it isn't. They also state that the QSO doesn't appear to be shrouded in any way by interstellar gas (as one might expect if one where looking through the core of a spiral galaxy to see it. Finally, they ask the question whether it's an accidental superposition and conclude "In our view, the very low probability of a chance superposition is yet more evidence in favor of the view that this QSO is at the distance of NGC 7319."
Now you asked whether others have looked at this issue. Do you honestly believe that Big Bang believing astronomers wouldn't challenge this observation and conclusion in print if they could?
I think most astronomers have ignored it because the simplest explanation is that it is shining through from behind the galaxy.
Astronomers who have invented countless gnomes (black holes, magnetic reconnection, tangled field lines, neutron stars, quark stars, dark matter in a dozen flavors or more, dark energy ... whatever that is, inflation, changing fundamental constants, etc, etc, etc) just to make Big Bang *sort of* explain the observations are hardly in a position to claim they've ignored data because there is a "simpler" explanation. Not when all the while they've simply ignored electromagnetic explanations for a multitude of observations.
Just look at the picture. The core of this galaxy is relatively dense. And as the article above pointed out, the light characteristics of the quasar do not show any clear indication that the light is passing through that core. There is also no sign of a gap in the core that would allow light to pass through it.
The spectra shows absorption from the galaxy, which they attribute to it shining through interstellar gas, exactly what you would expect if the quasar was shining through from behind the galaxy.
As the paper actually states and as you quoted it stating, one would also expect absorption if the object were ejected from the core on this side of the galaxy but has not completely left the confines of the galaxy. And why do you ignore the observed plasma filament coming from the core towards the QSO? Just another coincidental alignment in your opinion?
Basically because there are no other bacground objects behind the disk, this one can't be either.
The fact that there are no other observed background objects (quasars, galaxies, etc) shining through the core region does add support to the argument that this one object alone from potentially many is not shining through the core. For that matter, can you provide examples of other spiral galaxy cores where background objects are found to be shining through? If not, that would make this an exceedingly rare event.
So this is the only system they have found where they can demonstrate interaction between the quasar and the galaxy.
If you are trying to suggest this is the only case showing an interaction between a galaxy and a quasar, you are apparently unaware of study after study to the contrary.
They then propose a method to follow up and strengthen their case. So why haven't they?
Perhaps because they don't control the telescopes (like Chandra) that would make such observations and those who do control those telescopes have become increasingly reluctant to give time to astronomers like Arp and Burbidge.
Let me repeat ... this is not the only observation suggesting a problem with Big Bang's interpretation of redshift.
Ever hear of the Einstein Cross? It's another case of quasars aligned with the heart of a galaxy. Here are some links to images of it:
http://apod.nasa.gov/apod/image/0010/qso2237_wiyn.jpg
http://www.holoscience.com/news/img/Einstein Cross.jpg
There appear to be four quasars, with redshifts about z = 1.7, buried deep in the heart of a low redshift (z=0.04) galaxy. Sound familiar? To explain this away, mainstream astrophysicists invoke gravitational lensing, despite a calculation by Fred Hoyle showing that the probability of such a lensing event was less than two chances in a million (and by the way, for the record, there are now several other cases like this which is all the more unlikely).
The Hubble Space Telescope has imaged the cross and using those observations Halton Arp was able to show that there is connecting material between one of the quasars (D) and the central galaxy. A high redshift connection has also been discovered between quasars A and B. It passes in front of the connection between the nucleus and quasar D. Plus, the brightness of the four quasars was observed to increase over a period of several years. Arp's explanation is that the galaxy has ejected four quasars, which are growing brighter with age as they move farther from the nucleus. The mainstream's lensing explanation is that individual stars pass in front of the quasar are producing additional gravitational lensing. So now they are not only assuming lensing by a supposed perfectly aligned black hole at the heart of the galaxy but lensing by specific stars in the galaxy too.
Also the luminosity of the quasars seems to vary independent of one another. Explain that with gravitational lensing. And here's a paper,
http://vela.astro.ulg.ac.be/themes/dataproc/deconv/articles/q2237/q2237.html#len , that concludes one quasar image's light is being absorbed and reradiated by dust ... which might be the case if the quasars are actually separate objects embedded in the host galaxy but unlikely in a lensing case. Chandra observations also indicate that object A has a broad emission line in the Fe/K alpha while objects B,C,D do not. How can this be with a single lensing galaxy or star? Afterall, according to NASA (
http://hubblesite.org/newscenter/archive/releases/1995/43/text/ ), "it is impossible to identify the true gravitational lenses without observations which show the two objects have exactly the same spectral fingerprint and so are "multiple" images of a single object." These don't so what should that tell NASA?
Even ignoring the above observations (which Big Bang proponents seem almost desperate to do), there is still plenty of evidence against the validity of the redshift/distance relationship. Halton Arp (who you recall worked for Hubble) has identified hundreds of instances where low redshift galaxies seem to be connected to high redshift galaxies and quasars by plasma filaments. He's got a catalog them. The sheer number defies the probability that all are just chance occurences.
Are you familiar with the case of NGC 7603 where 3 much smaller, relatively high redshift objects are seen strung along a low redshift plasma filament coming from a similarly low redshift galaxy. Here is a link to an image of that curious alignment:
http://www.haltonarp.com/articles/research_with_Fred/illustrations/figure_1_b.jpg
Two astronomers have now written several peer reviewed papers (for example, López-Corredoira, Martin and Carlos M. Gutiérrez (2002), “Two Emission Line Objects with z>0.2 in the Optical Filament Apparently Connecting the Seyfert Galaxy NGC 7603 to Its Companion,” Astronomy and Astrophysics) where they conclude, based on better Hubble Telescope observations, that the three objects are small compact galaxies. I won't dispute that ... afterall, that just makes the Big Bang redshift problem larger than just an inconsistency in the quasar data.
The two astronomers say the two objects along the filament are highly unusual dwarf HII galaxies
whose light characteristics may themselves be suggestive of a non-cosmological explanation for redshift. In addition, they note that the HII galaxy closest to NGC 7603 is "warped towards NGC 7603" and the other has a faint tail that "could indicate that the material in the filament interacts with the galaxies." They state that the probability of the alignment of all three galaxies on the filament is about 3 x 10^^-9. The authors conclude that "everything points to the four objects being connected among themselves". So it would appear the problem is definitely more than just one involving quasars.
A probability of alignment of 3 x 10^^-9 is very, very small. It's highly unlikely that Arp just happened to discover this "coincidental" alignment after examining a few thousand or even tens of thousands of cases. And if that's not enough reason to be suspicious of the redshift/distance relationship, there are also dozens of instances where Halton Arp and others have identified low redshift galaxies that have quasars (or at least what astronomers still identify as quasars) anomalously clustered around them. The paper discussed at the beginning of this post names some of them.
Here is a paper by Arp, Burbidge and others titled "An anomalous concentration of QSOs around NGC 3079" (
http://arxiv.org/abs/astro-ph/0510815 ). The paper's abstract states "it is shown that there are at least 21 QSOs within 1 degree of the nearby active spiral galaxy NGC3079. ... snip ... The probability that this is an accidental configuration is shown to be less or equal to one in a million. Discovery selection effects and microlensing fail by a large factor to explain the phenomenon, suggesting that the QSOs may lie in the same physical space as NGC3079."
Here is a more general article by Arp and David Russell on quasar clustering near galaxies:
http://www.journals.uchicago.edu/ApJ/journal/issues/ApJ/v549n2/51780/51780.html . Among their conclusions is that "for the typical association we are dealing with a probability of around 10^^-5. ... snip ... Of course some of these associations have probabilities which put them in the class of experimentum crucis, such as NGC 6217 and NGC 470/474. Here these have P < 10^^-6 and P 2 × 10^^-9."
The above paper also notes the fact that groups of quasars are often noticeably aligned with specific features of low redshift galaxies, such as the minor axis, the major axis, plumes and jets. Just like the one in NGC 7319. This too is highly improbable if it's just a "chance" alignment. In fact, the paper states that "alignments of quasars along the minor axes of the Seyfert galaxies NGC 3516 and NGC 5985 could also be cited as having P < 10^^-6 and P < 10^^-8".
Arp published a paper,
http://www.journals.uchicago.edu/ApJ/journal/issues/ApJ/v525n2/39505/39505.html "The Distribution of High-Redshift (z >= 2) Quasars near Active Galaxies" in the peer reviewed Astrophysical Journal in 1999 where he concluded there is "evidence for ejection of material in opposite directions from nuclei of active galaxies." Also, "there is a clear tendency for these ejections to be along the least obstructed direction, the minor axis of rotating galaxies." He calculated the probability that the quasar triplets found in two fields surveyed by the Westerbork radio telescope would be close to the central object, have an alignment across the central galaxy and have similar redshifts to each other is 10^^-8 to 10^^-9. Highly unlikely. He further noted that "medium-redshift quasars are brighter and fall farther from the active galaxies. The higher, z >= 2 quasars are fainter and fall closer to the active galaxies. When the active galaxy is severely disturbed, the quasars fall closer, are more numerous, and are fainter and more similar in redshift."
The paper at
http://72.14.253.104/search?q=cache....gz+NGC+3628+quasars&hl=en&ct=clnk&cd=5&gl=us discusses a low redshift (Z = .0028) galaxy NGC 3628 surrounded by numerous high redshift quasars. NGC 3628 has an active nucleus with HI plumes emerging in both directions on the minor axis sides. The following image
http://www.eitgaastra.nl/pl/f54a.gif
shows the location of some of the quasars relative to the galaxy. According to the above paper, there are three quasars (z = 1.94, 2.43 and 0.408) at the base of the east-north-east plume, coincident with the start of an optical jet. Two more quasars, with z = 2.06 and 1.46, align along what looks to be the opposite side major axis. Three more quasars lie in the southern plume along the minor axis with z = 0.995, 2.15. 1.75. There is candidate quasar called Wee 49 which is the object labeled A near the Z = 1.75 quasar. It has a redshift of Z = 1.70. Both of these lie along a thickening of the plume. According to the paper, Wee 49 lies right at the tip of the southern HI plume. The article concludes "these quasars are not only aligned with the plumes, but positioned along contour nodes. This is strongly indicative of physical association, and implies that these quasars and HI plumes have come out of NGC 3628 in the same physical process." There are also narrow x-ray filaments coming from the galaxy on the minor axis sides. The authors state that the location of the z = 2.15 quasar is at the very tip of one x-ray filament and that alone has a probability of 2 x 10^^-4. The next quasar in toward the nucleus is at z = 0.995 and it is centered on the x-ray filament as well. Notice that at a slightly greater distance on the opposite minor axis side of the galaxy from the Z = 0.995 quasar is a quasar of Z = 0.984. The authors note that "These redshifts are closely matched - a characteristic of many previous pairs of quasars across active galaxies - and demonstrate how unlikely it is that they are unassociated background objects."
Consider the improbability of so many chance alignments in just the above case. So many quasars clustered around a particular galaxy rather than more uniformly distributed. Alignments with other quasars, with plumes, with optical jets, with x-ray filaments, with the minor axis, and with the major axis. The chance of this just happening by accident has to be astronomically small. Yet, Big Bang proponents continue to insist that all these alignments are just pure chance, even though Arp and others have provided dozens of similar examples where groups of quasars (and other objects) are aligned with the minor axis of low redshift galaxies or with some other prominent feature of those galaxies.
Even more interesting, it appears the redshift of quasars tends to decrease as one moves out from the core of the galaxies to which they seem to be associated. The Arp and Russel paper has numerous examples of this and I have posted images from a few other cases ... for instance, NGC 7603 and NGC 3628, mentioned above. Here's still another ... six quasars aligned along the minor axis of NGC 3516 with redshifts decreasing as one moves away from the galaxy. Here is a link to a diagram of that case:
http://www.haltonarp.com/articles/astronomy_by_press_release/illustrations/figure_1.jpg
Yet, Big Bang proponents continue to insist that all these alignments are just a matter of pure chance. Time and time again, peer reviewed papers cite extremely low probabilities for these alignments, yet Big Bang cosmologists insist that each is just a chance alignment and that high redshift can only be due to recession at great distance.
But what are the odds they are all just chance alignments? Even common sense should tell you that the correct answer is very close to ZERO. Clearly, Big Bang cosmologists and proponents are in denial ... and the reason they are in denial is that quasars have become a central part of their model of the early universe. If they aren't distant objects, that model will fall apart. And the reason has to do with what Big Bang proponents say quasars are ... black holes, yet another gnome.