Nucleated Dwarf Galaxies
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Posted
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Nice error margin on the redshift. Based on the comparison of colors and appearance with the other ones this one is also probably somewhere in the z=0.003-0.004 range.
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Well I think it is safe to conclude they aren't coincidental foreground stars, probably alot of them misidentified by SDSS as stars due to the faint spectra.
But what are the white point-sources in the center? Faint LSB Dwarf galaxies hosting SMBH's? Mini-AGN's? Not really bright but very distinctive objects
AFAIK not like globular star clusters which can have a lot of stars concentrated in the center but don't have real nuclei. So probably something in between star clusters and bigger galaxies, but a bit more akin to full-blown galaxies?
In the meantime I'll collect more, but this is a pretty good representative set already.
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mlpeck
in response to Ghost_Sheep_SWR's comment.
Those are called "nucleated dwarf galaxies," I think. Did you get these from the low redshift galaxies misidentified as stars discussion? There were a fair number of these in the lists that were posted. A few of them are probably uncataloged.
I think I tweeted at somebody on the science team about that discussion, got no response, and moved on to topics of more interest to me.
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Ghost_Sheep_SWR
in response to mlpeck's comment.
Those are called "nucleated dwarf galaxies," I think.
Ah yes thanks, correct designation.
Did you get
these from the low redshift galaxies misidentified as stars
discussion? There were a fair number of these in the lists that were
posted. A few of them are probably uncataloged.No actually, although now I see the similarities. That thread came to be because I stumbled upon one galaxy misidentified by SDSS as 'star'.
This one I started because the white object is usually called coincidental foreground star, and misidentification by SDSS as star (with spectral type!) strenghtens this. But after seeing a certain number of almost the same galaxies I got convinced these are not foreground stars but some sort of nucleus. Which indeed most / all are.
I think I tweeted at somebody on the science team about that
discussion, got no response, and moved on to topics of more interest
to me.Yeah I saw the tweet, retweeted it some time later IIRC. Seems a fair amount of study is already done on these objects, but perhaps collecting them might reveal some new unknown ones.
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Sirritanga
More candidates:
AGZ000cza0
AGZ000cz3d
AGZ000cz9oPosted
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Sirritanga
And shall there be a separate hashtag for these?
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Not that I know of, just started to collect them because I think they are really cool and might be usefull in the future, nothing official from GZ or anything, thanks! 😃
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bluemagi
AGZ000czao, There are alot of these in the sdss listed as F9 stars came across a least a dozen or more last year. BM
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From thread https://talk.galaxyzoo.org/?_ga=1.191070186.1751955194.1484309494#/boards/BGZ0000004/discussions/DGZ0002b49
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Sirritanga
AGZ000d843 with star formation
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Sirritanga
AGZ000d1q7 two dwarfs merging?
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Two spirals nearby at 12:00 and 13:00, rich background cluster at 9:00
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bluemagi
https://talk.galaxyzoo.org/?_ga=1.191070186.1751955194.1484309494#/subjects/AGZ000d79w
184.36063492 13.73703164
bluemagi
https://talk.galaxyzoo.org/?_ga=1.191070186.1751955194.1484309494#/subjects/AGZ000cz68
190.10799832 4.05014631
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posted by alex_nnn and bluemagi
187.05006299 10.36532024
posted by alex_nnn and bluemagi
nucleated dwarf with faint spiral pattern or in between dwarf and spiral galaxy (mini-spiral)?
166.48454307 19.82627398
Posted by PrinceofEuropa
156.05449851 21.0497349
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Sirritanga
Posted
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Ghost_Sheep_SWR
in response to Sirritanga's comment.
Does look like one but has a redshift of z=~0.05 so probably not a dwarf but a distant spiral mimicking the appearance 😃
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Posted by graham_d and bluemagi
142.55359875 19.99143537
Posted by bluemagi
192.53053653 2.24788081
Posted by bluemagi
202.46318413 46.58249342
Posted by alex_nnn and stevan_white
190.72542829 11.43823858
Posted by bluemagi
186.02192842 10.06774718
Posted by bluemagi and PrinceofEuropa
180.44636448 28.36138974
Posted by angelikabellinghausen and bluemagi
188.81120933 12.23742301
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