AGN-illuminated cloud?
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by CeciliaB
This radiogalaxy is surrounded by blue clouds. In SDSS they don't have the usual starforming, light-blue colour. The colour here is more purple, looking like the colour of an AGN-illuminated cloud, I think. Could it be one? (One lives in hope...)
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by Budgieye moderator
You are getting closer. đ It is pea, glowing with blue oxygen of exploding stars, but it has the white of ordinary stars thrown in. AGN clouds are even brighter.
http://skyserver.sdss.org/dr9/en/tools/explore/obj.asp?ra=139.24990786564447&dec=9.446821662506778 SDSS J091659.97+092648.4
AGN cloud, UV light from the nucleus shining on hydrogen, making it glow. The colour is pure blue.
http://skyserver.sdss.org/dr8/en/tools/explore/obj.asp?id=1237658204517171276
Friday, October 4th, 2013: Voorwerpjes, more than just Hanny's voorwerp http://www.galaxyzooforum.org/index.php?topic=281407.0
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by CeciliaB
Thank you, Budgieye. So peas don't necessarily have to be small round galaxies with a high olll peak in the spectrum?
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by Budgieye moderator
An OIII object. Strictly speaking, peas are more distant galaxies, the entire galaxy shining green in SDSS. There were common in the past, which is why we see them at redshifts near z=0.2 Anything closer is blue, and is not as far in the past. Only part of the galaxy is blue, and I really should have called it an OIII object. There are no pea galaxies in the present.
PAGE 2  Galaxy Redshift Chart http://talk.galaxyzoo.org/#/boards/BGZ0000007/discussions/DGZ0000ulp?page=2
*3.8 Green compact starburst,Peas * http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=3&comment_id=53d8b93a0d43f77bb6000f98
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by CeciliaB
Thank you for all your information! There is a lot to learn about these beautiful and interesting objects. "My" galaxy is perhaps slightly atypical with its fairly low Olll peak.
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