Gravitational lensing?
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by CeciliaB
SDSS
http://skyserver.sdss.org/dr9/en/tools/explore/obj.asp?ra=216.59953986&dec=2.26954837
In the SDSS image the red rings seem a bit too fuzzy and too close to the core to be caused by lensing?
DECaLS DR5
http://legacysurvey.org//viewer/jpeg-cutout?ra=216.5995&dec=2.2696&zoom=16&layer=decals-dr5
In DECaLS DR5 the red objects are more clearly defined.
Posted
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by Budgieye moderator
jq2uoz and CeciliaB, I think we will need to call in a lens scientist. It could be a buried ring, there is a hint of a counter point on the other side of the nucleus.
I might have expected an usual peak in the red at 7000 or 8000 from a lensed galaxy in the background, but I don't see one.
Lensing does not affect the spectrum of a galaxy, though two galaxies will have their spectra mixed together.
Here is a spectrum of a barred spiral galaxy z=0.7, for comparison
http://skyserver.sdss.org/dr10/en/tools/explore/summary.aspx?id=0x112d0773a0ba016e&spec=&apid=
http://skyserver.sdss.org/dr10/en/tools/explore/summary.aspx?id=0x112d0773a0ba016e&spec=&apid=
Posted
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GAMA KIDS gri and VIKING JHK
Better visible in VIKING I think, although neither as clear as the DECaLS DR5 image.
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by CeciliaB
Thanks Budgieye and Ghost_Sheep_SWR!
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