Gravitational lensing?
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RA Dec 129.6064 30.2868
Could this be a gravitational lens, maybe from the red galaxy on the right? Central galaxies are +/- z=0.295, red galaxy on the right z=0.51821.
http://skyserver.sdss.org/dr9/en/tools/explore/obj.asp?id=1237660765374578739
http://legacysurvey.org/viewer?ra=129.6063&dec=30.2866&zoom=16&layer=decals-dr3
http://imagine.legacysurvey.org/?ra=129.6064&dec=30.2869&zoom=16&layer=decals-dr1j
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by
ElisabethB
moderator
The arc to the left could be gravitational lensing. I know I would've marked it as one. 😉
But the red galaxy to the right is too far from the 3 galaxies in the centre to be a grav lens.
Nice catch ! 😄Posted
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Great! Yes that arc. Well let's hope for the best then since it isn't registered as lens yet.
I meant that the red galaxy maybe is the galaxy that is gravitationally lensed by the three ellipticals, that the arc is an image of the red one ( if it IS a lens).
Not a GZ ID so far BTW.
Posted
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Dolorous_Edd
in response to Ghost_Sheep_SWR's comment.
I will second that this is a possible lens, but the red galaxy has nothing to do with it
Bluish stuff is the image of the lensed galaxy
Posted
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ElisabethB
moderator
Yep, I'm with Dolouros_Edd : the red galaxy to the right is definitely not the one being lensed. I have done some modelling grav.lenses ( 😉 )and that red galaxy is just too far away from the 3 galaxies doing the lensing.
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Ah ok, I have very limited experience with them.
Do you know of a source where I can search through all known lenses like the Transient Server for transients?
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Budgieye
moderator
Each lensing search team has its own list of lenses.
Looking at this should get you started.
3.9 Gravitational lenses https://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=3
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Ghost_Sheep_SWR
in response to Budgieye's comment.
Yes there are good links to teams and collections there, including the #lens collection, will check them thanks!
Also figured out and queried SIMBAD on object type, gets a decent 994 and 719 objects 'Lens' and 'Lens System', so that should cover most probably? This one is not among them, but looking at the bright blue or red confirmed lenses this one seems pretty messy and kind of dim in comparison.
Can't seem to figure out how to do the same in NED ADS...
EDIT NED objects from "The Sloan Lens ACS Survey. IX. Colors, Lensing, and Stellar Masses of Early-Type Galaxies"
http://adsabs.harvard.edu/abs/2009ApJ...705.1099Ahttp://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?search_type=Search&refcode=2009ApJ...705.1099A
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Well, absolutely nothing in SIMBAD, NED, VizieR or ADS.
Tried making better images from DECaLS, PANSTARRS and SDSS, now I can conclude 2 things;
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After playing around with the FITS files I'm more in doubt that it could be a gravitational lens than before. It seems very likely instead that it is a close interacting cluster and the feature is actually some sort of residual tidal stream. At least two galaxies are close, but more likely all three are close and interacting.
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Highlighting features while keeping a well-balanced images is difficult, especially near much brighter sources.
image credit: DECaLS, PANSTARRS-1, SDSS ( www.SDSS.org ), AF Jonkeren and Aladin Desktop
image credit: DECaLS, SDSS ( www.SDSS.org ) and AF Jonkeren
image credit: DECaLS and AF Jonkeren
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