Inner Ring Collection (previously: Nuclear Ring Collection)

by Alpha_Aurigae

Let's start a nuclear ring collection. Maybe some of them are not nuclear rings but artifacts.
Here is the first one:

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AGZ0003y48

Posted November 19, 2014 9:17 PM

by Alpha_Aurigae

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AGZ0004z0d

Posted November 19, 2014 9:17 PM

by Alpha_Aurigae

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AGZ0004uy9

Posted November 19, 2014 9:18 PM

by Alpha_Aurigae

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AGZ0001t1v

Posted November 19, 2014 9:18 PM

by Alpha_Aurigae

Maybe, maybe not:

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AGZ0005ntk

Posted November 19, 2014 9:19 PM

by Alpha_Aurigae

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AGZ0003b2z

Posted November 19, 2014 9:20 PM

by Alpha_Aurigae

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AGZ0005ykv

Posted November 19, 2014 9:21 PM

by Alpha_Aurigae

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AGZ0004tzd

Posted November 19, 2014 9:21 PM

by Alpha_Aurigae

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http://talk.galaxyzoo.org/#/boards/BGZ0000006/discussions/DGZ0000pex

Posted November 19, 2014 9:22 PM

by Alpha_Aurigae

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AGZ00030h0

Posted November 19, 2014 9:23 PM

by Alpha_Aurigae

Not very sure about this one:

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AGZ0003ytf

Posted November 19, 2014 9:24 PM

by Alpha_Aurigae

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AGZ00038iz

Posted November 19, 2014 9:25 PM

by Alpha_Aurigae

Maybe here:

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AGZ00041lt

Posted November 19, 2014 9:25 PM

by Alpha_Aurigae

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AGZ0003io8

Posted November 19, 2014 9:26 PM

by Alpha_Aurigae

Maybe over here:

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AGZ0003z0n

Posted November 19, 2014 9:27 PM

by Alpha_Aurigae

Now this one is very interesting. Is it a disturbed nuclear ring caused by the merger, or is it a new feature because of the merger:

enter image description here
AGZ00024rp

Lots of material on this system:

http://www.galaxyzooforum.org/index.php?topic=273136.msg223082 #msg223082

http://link.springer.com/article/10.1007%2FBF00646368

https://archive.org/details/arxiv-astro-ph9905300

http://arxiv.org/abs/astro-ph/9702203

etc. etc. etc.

So it probably isn't a disturbed nuclear ring.

Posted November 19, 2014 9:29 PM

by Alpha_Aurigae

Here it is again. This time you can clearly see the disrupted spirals arms. What might be of interest is a jet of gas is ejected our way, maybe even the nucleus of the galaxy itself!

http://commons.wikimedia.org/wiki/File:NGC_1144_-HST05479_3o-546m.png

Posted November 19, 2014 9:42 PM

by Alpha_Aurigae

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AGZ00035g2

Posted November 21, 2014 10:40 PM

by Alpha_Aurigae

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AGZ000564r

Posted November 21, 2014 10:42 PM

by Alpha_Aurigae

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AGZ0004npb

Posted November 21, 2014 10:43 PM

by Alpha_Aurigae

Maybe NGC 2937, though only visible in Infrared:

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AGZ0006b4h

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Posted November 22, 2014 7:17 PM

by Alpha_Aurigae

Here is another one that can be seen in infrared. Is it a nuclear ring or an optical effect?

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AGZ00079q9

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Posted November 22, 2014 7:28 PM

by vrooje admin, scientist

How often does this feature appear in otherwise smooth elliptical galaxies, in UKIDSS but not in SDSS?

If it's anything other than quite rare I'd suspect an artifact.

Posted November 22, 2014 7:53 PM

by Alpha_Aurigae

Maybe

enter image description here
AGZ0001t2u

Posted November 23, 2014 8:46 AM

by Alpha_Aurigae in response to vrooje's comment.

Hi vrooje,

I only found two so far.

EDIT: I found another two. See next posts.

Posted November 23, 2014 8:48 AM

by Alpha_Aurigae

Another two in infrared. I am beginning to think this is an artifact.

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AGZ0007ix7

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Posted November 23, 2014 8:54 AM

by Alpha_Aurigae

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AGZ0007i11

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Posted November 23, 2014 8:54 AM

by c_cld

In "examine" check the "view raw data in different wavelengths" before interpreting features in the outcome of composition of three bands in RGB colors! 😃

often you get fakes due to different stretches/scales of each band...

Posted November 23, 2014 10:34 AM

by Alpha_Aurigae

Thanks C_cld 😃.

There is one galaxy in the UKIDSS data with a nuclear ring. However you can only see it in visible light, not so much in the infrared image:

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AGZ000726f

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Posted November 23, 2014 1:21 PM

by Alpha_Aurigae

Not that close to the nucleus

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AGZ0002qxp

Posted November 23, 2014 3:38 PM

by Alpha_Aurigae

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AGZ0002wv5

Posted November 23, 2014 3:40 PM

by Alpha_Aurigae

Not sure about this one

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AGZ0005w0q

Posted November 23, 2014 3:40 PM

by Alpha_Aurigae

Maybe here:

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AGZ0003mn4

Posted November 23, 2014 5:08 PM

by mlpeck in response to Alpha Aurigae's comment.

Are you familiar with the Virtual Astronomical Observatory (VAO) data discovery tool? It's a good way to find out what images and other data are available for any specific object you're interested in.

I checked out the UKIDSS fits files for NGC 2937 and there's no sign of a central ring in any passband. There's also Spitzer imaging for the entire Arp 142 system and again there's no sign of a ring. NGC 2936 on the other hand is quite spectacular at 8μ.

Posted November 23, 2014 5:43 PM

by Alpha_Aurigae

No, I am not, I m just a regular Joe on Galaxy Zoo, but any help in finding images elsewhere would be greatly appreciated. I am also on the hunt for supernovae that haven't been found yet, It would be great to find one 😃.

Posted November 23, 2014 6:01 PM

by JeanTate

AA, many of the objects whose images you've posted are visually quite striking. 😄

However, I'm wondering how many are actually nuclear rings? I'm not concerned with things that look like rings, but are actually artifacts (others have already addressed this); rather, with how you distinguish between inner rings (per de Vaucouleurs, for example) and nuclear rings.

For example, when is an inner ring just that, a ring (or tight spiral) with a radius ~the same as the outer extent of the bulge, say, and when is it clearly within the nucleus?

To be clear, this looks exciting stuff! 😃 However, a serious examination would likely benefit from some clarity with respect to defintions.

Posted November 23, 2014 11:31 PM

by klmasters scientist, admin

Nice collection. If I may make a couple of comments.

I would say some of the inner rings you find only in the UKIDSS images look like artefacts caused by the bright nuclear region.
The resolution of the SDSS images is such that these aren't going to be "nuclear rings" as such, but still as a set of "inner rings" (ie. meaning rings inside the main body of a galaxy, as opposed to outer rings) they are really interesting.

Posted November 24, 2014 10:38 AM

by Alpha_Aurigae

Thanks Jean and klmasters 😃

I once saw Budgieye tag a ring as nuclear ring, and that made me look for similar features and I used the same term.

I hope I have made a small contribution in collecting these inner rings. With every discussion and collection I create I also hope to educate myself and value the input of other people 😃 .

Someone else is going to have to continue this discussion, as I have moved on to other things.

Again, thank you both, it was a blast collecting them 😃

Cheers,
Abe

Posted November 24, 2014 12:58 PM

by Alpha_Aurigae

Updated the title of the discussion 😃

Posted November 25, 2014 2:35 PM

by Alpha_Aurigae

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AGZ0004npc