Funny galaxy in Galaxy Zoo
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by Budgieye
Is there a match to something on Radio Galaxy Zoo?
Telescope: SDSS
Right Ascension: 7.7256 °
Declination: 10.4088 °http://skyserver.sdss.org/dr9/en/tools/explore/obj.asp?ra=7.725632727291517&dec=10.408750554307993
EDIT
This is the discussion on galaxy zoo.
Unusual colours in edge-on https://talk.galaxyzoo.org/#/boards/BGZ0000004/discussions/DGZ0002n2e
Posted
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by Dolorous_Edd
Yep, it is this field
https://radiotalk.galaxyzoo.org/#/subjects/ARG00031mv
Looks like standard compact radio source .. dunno maybe even triple if look at NVSS
Posted
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by JeanTate
It looks a bit like a triple in TGSS too ... but as with NVSS I think that's due to there being several unrelated ~compact sources nearby.
I recently looked at some of the GZ UNCERTAIN objects (there are >300k of them; I selected ones I thought likely to be spirals). A lot look like mergers, and some have interesting colors, a bit like this fuzzy galaxy (of course, some are also radio sources; all those in this post for example). Here's one example, zsp 0.094 SDSS J225922.96+143154.0, in ARG0002pev:
Not quite the same mix of colors, and rather different morphology, is zsp 0.094 (coincidence!) SDSS J152927.75+123910.3, in ARG0002u4d:
Perhaps the funnest find was zsp 0.196 SDSS J122822.29+264344.1, in ARG0001x7e (why did I think this was perhaps the funnest?**):
There are thousands of weird galaxies in SDSS, and the various catalogs make finding them relatively straight-forward (lots of false positives of course); radio sources optional ... (holler if you'd like some suggestions on how go about finding such weirdos).
** hint: in one of the KS16 catalogs it has a 'spirality' of 0.73, but in GZ its P_CS_DEBIASED is just 0.07 (P_EL_DEBIASED is 0.75)
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by Budgieye
Thank you for looking up the radio data.
Therefore, I can conclude that the unusual colour of the galaxy is due to something happening in the galaxy, and is not just an artifact which can be ignored.
Info posted in https://talk.galaxyzoo.org/#/boards/BGZ0000004/discussions/DGZ0002n2e
Ummm. a triple means that it has lobes?
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by Dolorous_Edd in response to Budgieye's comment.
Ummm. a triple means that it has lobes?
Yep
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by JeanTate in response to Budgieye's comment.
Therefore, I can conclude that the unusual colour of the galaxy is due to something happening in the galaxy, and is not just an artifact which can be ignored.
I just posted a reply in the GZ Talk thread; yes indeed, the main colors are likely not artifacts (some of the gradients and fringing may be artifacts). I don't think it's possible to say with certainty that there's recent (perhaps on-going) star-formation on one side and not the other; the green (right) may be blue/white turned to green by intervening dust, which the galaxy seems to have lots of. Could there also be extensive HI regions, or 'green pea'-like [OIII] emission? Without a spectrum, who can say?
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by Budgieye
Thank you for the analysis.
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