NGC 3184 - sprawling spiral galaxy.

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astroeyes
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NGC 3184 - sprawling spiral galaxy.

Post by astroeyes »

Image

NGC 3184 is a fairly large, bright spiral galaxy with a small nucleus and long sprawling spiral arms. You can find it in the constellation of Ursa Major, where it is well situated for viewing at the present time of year. It's about 25 MLy away so it's relatively close. NGC 3184 is classified (Sbc) and is notable for its high abundance of heavy elements and a supernova that has occurred there recently but is no longer visible. There are a couple of HII regions which have their own NGC numbers and I've identified them on my image. The quasar is mag. 20, z = 2.12. There is actually another superimposed right in front of (or behind!) the nucleus of NGC 3184 but I am sadly unable to positively identify it in my image. It would be very interesting if it turned out to be nearer than NGC 3184 because it has a z of 0.152, whereas NGC 3184 has z of only 0.00191.
38 x 120sec exposures, sigma combined in AstroArt3, produced this one.
Kind regards,
David.
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3184sigdbeusmanotenhansm.jpg
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Last edited by astroeyes on Tue Mar 17, 2020 7:52 pm, edited 3 times in total.
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brian livesey
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Post by brian livesey »

Another fine and informative image from you David. You would have done Edwin Hubble proud. :wink:
brian
Cliff
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Post by Cliff »

Dear David
Another cracker !
Not to mention the interesting gen you provided.
Great to get the mag 20 quasar too.
I'm amazed a quasar can be seen\imaged\detected directly in line with NGC 3184's nucleus - irrespective of whether it's behind or in front of 3184. If it is in front presumably all hell let's loose a sort of different BIG BANG.
Best wishes from Cliff
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Post by Davej »

Hi David,
Thanks for another amazing image and good info on another fairly obscure object.
I understand what Cliff means about the quasar's position.
Have any other quasars been detected in front of galaxys? I thoght quasars were the most distant objects? Very interesting.
Thanks for sharing.
All the best
Dave
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Ender Of Days
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Post by Ender Of Days »

Beautiful image,
I started Astronomy by reading all about a certain Mr Halton Arp and the theory of Quasars and Galaxies being connected,
Not sure I still believe but its interesting that they do crop up in a few images together (maybe its just because people look more at galaxies ? )

Anyway great image,

JJ..
aint no speed limit where im comin from ..
lets hit the highway doing 69


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astroeyes
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Post by astroeyes »

Thanks for all the replies.
For those interested enough to look further, there are several other published instances of quasars identified either in front of nearby galaxies or closely connected to them. 2 of the most convincing are, ngc 7319:

http://iopscience.iop.org/0004-637X/620/1/88/fulltext

& ngc 7603:

http://arxiv.org/abs/astro-ph/0203466

You might also find this link interesting:

http://cdsweb.cern.ch/record/1008625/files/0701061.pdf

and for a very interesting video featuring Halton Arp, Fred Hoyle, the Burbidge's and others, please see this:

http://www.youtube.com/watch?v=1yTfRy0L ... re=related

Don't forget to look at all 9 parts!

This site : http://sites.google.com/site/cosmologyq ... ding-space

lists a whole load of published papers discussing connected quasars and quantized redshifts. Very interesting stuff; there does seem to have been a lot of peer referenced work looking into problems in modern cosmology that has received little or no recognition or credit.
I'm not convinced either way, just find it fascinating.
Regards,
David.
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RobertH
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Post by RobertH »

That's a fine image David, and interesting as usual from you.

What's even better though, is that you're posting at all!
Amanda and I were just reading the Dorset Echo, and David Moth was in the 'deaths' section. :shock:
I'm extremely pleased to see that you're still with us, and it makes me realise it's about time I popped over!

Cheers
Rob.
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astroeyes
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Post by astroeyes »

Hi Rob,
Well, I do seem to be still around! Weird coincidence. Thanks for looking at the image and yes, it would be good to meet up again.
All very best,
David.
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