Author Topic: Hoag Type galaxies and Collisional rings  (Read 67105 times)

Thomas J

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Re: Hoag Type galaxies. Collisional rings?
« Reply #30 on: February 23, 2009, 01:33:16 am »
Thank you Cat.

For the record, I believe this may be collisional ring in the making, with the 'bullet' caught on camera.
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Geoff

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Re: Hoag Type galaxies. Collisional rings?
« Reply #31 on: February 23, 2009, 11:44:49 am »
The following rings were extracted from the Ring Galaxy thread when I was drafting my Ring OOTD. These may be collisional rings so I'm posting them here. More will follow as I get the time.
Posting #2



587738618096844880
First posted by Halibut72 29 July 2007.





~.~


587730816286261437
First posted by Baccha 4 August 2007.



587741830192889884
First posted by fluffyporcupine 13 August 2007.





~.~


587729227151704160
First posted by ALKA 14 August 2007.

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EdV

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Re: Hoag Type galaxies. Collisional rings?
« Reply #32 on: February 23, 2009, 11:53:23 am »
I'm not sure most of these are good for comparison... the ring in Hoag's Object is braided, see? Most of the others are smooth. :-\ But someof these really match it, and may help explain it!
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1000GGG

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Re: Hoag Type galaxies. Collisional rings?
« Reply #33 on: February 23, 2009, 04:47:17 pm »

ElisabethB

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Re: Hoag Type galaxies. Collisional rings?
« Reply #34 on: February 23, 2009, 08:59:29 pm »
first posted by thibault
587736807766491426

Thomas J

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Re: Hoag Type galaxies. Collisional rings?
« Reply #35 on: February 23, 2009, 11:19:22 pm »
Could this be a Ring Galaxy about to form?
http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=587726016145653884

Hi 1K3G, this one is a spiral. Take a look at he first poet for an example of a Hoag type.  ;) :)
I am very interested in the Universe- I am specialising in the Universe and all that surrounds it.....            Peter Cook.


Thomas J

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Re: Hoag Type galaxies. Collisional rings?
« Reply #36 on: February 23, 2009, 11:20:27 pm »
I am very interested in the Universe- I am specialising in the Universe and all that surrounds it.....            Peter Cook.


Lovethetropics

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m8cct

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Re: Hoag Type galaxies. Collisional rings?
« Reply #38 on: February 24, 2009, 11:11:23 am »
Found a possible ongoing ring merger  :)

http://cas.sdss.org/dr7/en/tools/quicklook/quickobj.asp?id=587739505016176650

what do you guys think?

1000GGG

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Re: Hoag Type galaxies. Collisional rings?
« Reply #39 on: February 24, 2009, 04:06:17 pm »
« Last Edit: February 24, 2009, 04:11:32 pm by 1000GGG »

Geoff

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Re: Hoag Type galaxies. Collisional rings?
« Reply #40 on: February 24, 2009, 07:51:32 pm »
The following rings were extracted from the Ring Galaxy thread when I was drafting my Ring OOTD. These may be collisional rings (or Hoag-like) so I'm posting them here. More will follow as I get the time.
Posting #3



587739814243205188
First posted by Fenster 17 August 2007.
  NGC 6028





~.~


587742012740862016
First posted by Jules 18 August 2007.
  UGC 6332



587731887348908142
First posted by jlowe 22 August 2007.





~.~


588017625089638415
First posted by EricFDiaz 25 August 2007.

EricFDiaz made the following comment about object 588017625089638415

"When I saw the spectrum of this galaxy, I immediately knew that it was a ring galaxy. The ring-like shape is the result of the gravitational disruption caused by an entire small intruder galaxy passing through a large one. When this happens, interstellar gas and dust become condensed, causing a wave of star formation to move out from the impact point like a ripple across the surface of a pond. In the spectrum of this galaxy there is a very strong H-alpha emission line--evidence of HII regions and therefore abundant star formation. But, the rest of the spectrum loosely resembled that of an elliptical galaxy which I take as the spectrum of the central golden bulge."
  Sometimes I think we're alone. Sometimes I think we're not. In either case, the prospect is staggering!- Arthur C. Clarke

Thomas J

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Re: Hoag Type galaxies. Collisional rings?
« Reply #41 on: February 24, 2009, 10:41:15 pm »
Found a possible ongoing ring merger  :)

http://cas.sdss.org/dr7/en/tools/quicklook/quickobj.asp?id=587739505016176650

what do you guys think?

for the record, this came up in the newbies thread and I thought it would be a good idea to post it in here.

I think it's a good candidate for a possible collisional ring merger in action
« Last Edit: February 24, 2009, 11:37:46 pm by Thomas J »
I am very interested in the Universe- I am specialising in the Universe and all that surrounds it.....            Peter Cook.


Geoff

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Re: Hoag Type galaxies. Collisional rings?
« Reply #42 on: February 24, 2009, 11:02:33 pm »
Found a possible ongoing ring merger  :)
[image snipped]
http://cas.sdss.org/dr7/en/tools/quicklook/quickobj.asp?id=587739505016176650

what do you guys think?

for the record, this came up in the newbies thread amnd I thought it would be a good idea to post it in here.

I think it's a good candidate for a possible collisional ring merger in action

Looks like one to me!
  Sometimes I think we're alone. Sometimes I think we're not. In either case, the prospect is staggering!- Arthur C. Clarke

Thomas J

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Re: Hoag Type galaxies. Collisional rings?
« Reply #43 on: February 24, 2009, 11:40:14 pm »
Found a possible ongoing ring merger  :)
[image snipped]
http://cas.sdss.org/dr7/en/tools/quicklook/quickobj.asp?id=587739505016176650

what do you guys think?

for the record, this came up in the newbies thread amnd I thought it would be a good idea to post it in here.

I think it's a good candidate for a possible collisional ring merger in action

Looks like one to me!

Thanks Geoff. I think it would be a good idea to include anything like this in here, if we are lucky we may bre able to build up a good picture.
I am very interested in the Universe- I am specialising in the Universe and all that surrounds it.....            Peter Cook.


Cat

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Re: Hoag Type galaxies. Collisional rings?
« Reply #44 on: February 24, 2009, 11:44:36 pm »
Do I see I ring beginning to form or is it my eyes?!

http://cas.sdss.org/dr7/en/tools/quicklook/quickobj.asp?id=587739114709057700



 :)
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