But, Halton Arp indicated the existence of a Bridge of matter connecting these two objects. This Bridge of matter is invisible in the image taken by the HST.  (For more information on this subject, we can consult the book "Seeing Red" by Halton Arp - (Apeiron, Montreal - pages 164 and 165).

It is the reason which prompts us to process this image. The result is in accordance with the claims of Halton Arp, the bridge is there, and very much so.

This does not necessarily mean that this bridge connects the objects. It is possible that it is an arm or a jet stemming from one of the galaxies, and that these three objects present this particular alignement.

But the hypothesis of the ejection of the quasar by the parent galaxy cannot be excluded. And therefore it is necessary to find the explanation of the abnormal red-shift observed in Markarian 205.

Discussion :  New (01/20/2006)

Preliminary note: Acknowledgments to the astrophysicist with whom a tight discussion allowed us to argue here on this difficult subject.

Let's examine closely the argumentation of those who rejects the physical connection between NGC 4319 and Mrk 205, and let's attempt to bring some answers there.

1. The redshifts are very different.

This is the very statement that is under scrutiny. Therefore, for Halton Arp, this statement cannot be used as a valid argument, and rightly so.

2. The UV absorption, by the halo of the galaxy NGC 4319, of the light emitted by Mrk 205; this would prove that Mrk 205 is not inside the halo of NGC 4319.

There is no evidence for Mrk 205 being "beyond" or "inside" of the halo of NGC 4319. In both cases, for a terrestrial viewer, the light of Mrk 205 crosses all or a part of this gas and is therefore attenuated.
	As we don't know how the light is attenuated, we are not able to deduct anything. The only way to solve this problem would be to redo, at same wavelength, the same kind of measurement that J.N. Bahcall & al, made, but on the three objects : the galaxy NGC 4319, the bridge of matter and the Quasar Mrk 205 From the analysis of the results one could finally resolve this polemic. Similar attenuations would show that Halton Arp was right. On the other hand a meaningful jump of the absorption, between these objects, would definitely invalidate his claims.
	On June 29th, 2009 a friend indicates us the existence of an image of NGC4319 in Aladin data base. This image is of inferior quality. The resolution is weak and it contains a lot of noise. However we can obtain a colour version from it. It is the colour version which we hurry to process. The strand connecting NGC4319 to Mrk 205 seems then very sharply. So we have a confirmation of this strand from another image.