Another example of unexpected Galaxy color
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by
edwarddewolf
The yellowish galaxies in this image is how I expect an elliptical to be. Why is the center one so white?
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MEGRENTE
They are not elliptical.
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vrooje
admin, scientist
The color indicates how much light is coming in at different wavelengths, and while most ellipticals have more red light than the other bands, which makes them appear yellowish/orangeish, that's not a hard and fast rule. So the galaxy in the center could be a blue elliptical.
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by
Budgieye
moderator
Posted
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by
MEGRENTE
Schawinski et al. (2009)
https://ui.adsabs.harvard.edu/#abs/2009MNRAS.396..818S/abstract is a broken link.Can anyone [in this discussion] leave several examples of "elliptical" late type objects?
Like this one https://www.galaxyzoo.org/#/examine/AGZ000e23a ?Posted
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vrooje
admin, scientist
The Wikipedia page on Ellipticals is a decent place to start on learning more about these galaxies: https://en.wikipedia.org/wiki/Elliptical_galaxy
Wikipedia also has entries on many NGC galaxies, including these elliptical examples:
https://en.wikipedia.org/wiki/NGC_4881
https://en.wikipedia.org/wiki/NGC_4889There are many other collections of NGC objects online (including on the old GZ forum!), and a search for "elliptical" finds examples on them, e.g. http://cseligman.com/text/atlas/ngc1a.htm to http://cseligman.com/text/atlas/ngc62a.htm and beyond
Ellipticals are scientifically fascinating so there are also many articles published on them, which means press releases and gorgeous photos and press coverage:
https://apod.nasa.gov/apod/ap120914.html
https://www.nasa.gov/mission_pages/hubble/science/ngc2768.html
https://mcdonaldobservatory.org/news/gallery/elliptical-galaxy-ngc-4472
https://www.spacetelescope.org/images/heic0208a/And, of course, one of the original science motivations for the creation of Galaxy Zoo was to find blue ellipticals. The results are published in this paper: Schawinski et al. (2009)
Hope that helps as a start! 😃
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