Galaxy Zoo Talk

Image AGZ0002au5

  • liometopum by liometopum

    what is this?

    Posted

  • Budgieye by Budgieye moderator

    It is an irregular galaxy, I can see some hints of structure. The blueness indicates that it is star forming, so the galaxy probably had a merger in the past. It is KUG 0958+373 #KUG KUG0958+373

    enter image description here

    enter image description here

    The rise at 4000 shows blue star formation. The peaks of O indicate star supernova and subsequent nebula formation. The H peak indicates that there is a slightly active black hole in there somewhere.

    http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237661383311097889

    The bright blue object is probably a star in our galaxy. It has the overexposed bit in the middle. If it were an area hit by a jet from the black hole, I think it would look more irregular. see 3.6 Relativistic jets http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=3&comment_id=53d8b92adb90c76710000f93 and 3.3 AGN-illuminated clouds, Voorwerpje http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=3&comment_id=53d8b8f5db90c76710000f90

    enter image description here

    http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237661383311097916

    Posted

  • liometopum by liometopum

    This is a wonderfully helpful reply!
    FIRST: I would not have thought that was stat, as in the SS image, no other stars are blue. But I have seen an image where a pixel got 'distorted' and over-emphasized by the software. I do not know how to access my own collections. I think I saved the example. I can try to find it for you.

    HOW DID YOU GET the KUG number? Sometimes a galaxy number is on the SS discription, but not in this case, nor in others where I see people list a number. How they get a galaxy number when it is not on SS has puzzled me for a long time.

    I like your explanation of the spectral lines. That is the first I have seen about this. Thanks!!

    As an aside, the link you give to the skyserver data is not the same as the link I get when I click on the link to view SkyServer information. And the reason is the target, it appears.

    This link targets the galaxy:
    http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237661383311097889

    This link targets the blue spot:
    http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237661383311097916

    How do you find the link to the blue spot, for example??

    You mention "see 3.6 Relativistic jets." HOW? I have classified nearly 2000 images, and I still don't know some of these basics. Thanks again.

    Posted

  • mlpeck by mlpeck in response to liometopum's comment.

    HOW DID YOU GET the KUG number? Sometimes a galaxy number is on the SS
    discription, but not in this case, nor in others where I see people
    list a number. How they get a galaxy number when it is not on SS has
    puzzled me for a long time.

    Just keep clicking, basically. From the Galaxy Zoo examine page you can click on "Search NED" . Or if you are in Skyserver Navigate click on "Explore" and then "Search NED". Either way you will jump to the NASA Extragalactic Database and a list of nearby objects will be displayed. In this case the KUG catalog number is on line 3 just because the spectrum was recorded for an area slightly displaced from the center of the galaxy.

    Budgieye has been here a lot longer than I have, but I think the blue point-like source is probably just a star forming region in the galaxy rather than a foreground star. It's hard to tell since the fiber was centered some distance away, but irregular galaxies generally have clumpy star formation with sometimes very intense localized star formation.

    I hope my US English spelling isn't too confusing.

    Posted

  • liometopum by liometopum

    Thanks! Your spelling is better than mine. I see I misspelt 'description'.

    Posted