Red spiral?
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I have seen a few spirals like these that are reddish. Are they really red or could it depend on the viewing telescope or wavelengths? I used to assume that they were red until I saw the following galaxy that looks bluish in the GAMA image and reddish in the SDSS image.
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zoob1172
GAMA processing makes most objects look bluer.
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Ghost_Sheep_SWR
in response to karthikeyan.d's comment.
Hi karthikeyan.d,
A lot of the red SDSS galaxies we see are seen 'through' the Milky Way which contains alot of gas and dust. This makes these galaxies look redder. In some way comparable to the sun looking redder at sunset here on earth.
Here is the far zoomed out position of the galaxy in WISE images, and you can see how close it is to the plane / center of the Milky Way. Zoom in/out and switch between unWISE W1/W2 and SDSS to check for yourself: http://legacysurvey.org/viewer?ra=249.8055&dec=-8.9571&zoom=4&layer=unwise-w1w2
EDIT ofcourse it also depends which colours are assigned to which of the three different bands that are used for the colour image. Individual bands have no colour themselves but are just greyish images.
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Budgieye
moderator
Some spirals are red 😃
1.10 Dust, red spirals, blue ellipticals, quenching http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=1&comment_id=53d8b7e9db90c76710000f80
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