Galaxy Zoo Talk

A lot going on in this one

  • PDXDave by PDXDave

    lens flare? plus mergers?

    Posted

  • Edd by Edd scientist

    Interesting red #arc there yes! Looks not implausible at all for a gravitational #lens I think, but not a lens flare from the telescope itself.

    Posted

  • vrooje by vrooje admin, scientist

    That's really gorgeous -- nice find!

    Posted

  • JeanTate by JeanTate

    A red arc! Wow!! That's fantastic!!!

    Posted

  • elizabeth_s by elizabeth_s

    Nice!

    Posted

  • Kevin by Kevin scientist, admin

    Indeed a very nice find - and puzzling. If it was blue, I'd say lens...

    Posted

  • hcferguson by hcferguson scientist

    I'm pretty sure this is one of the few candidates that have been noticed before. There is model for it in a paper by Asantha Cooray on astroph http://adsabs.harvard.edu/abs/2011arXiv1110.3784C. There should be about 15 in CANDELS and only a handful have been identified so far, so there ought to be more to find.

    Posted

  • zutopian by zutopian

    I think, that it is the #knownlens SL2S J021737-051329.:
    Presented in Fig. 2 in the following paper:
    "The CFHTLS Strong Lensing Legacy Survey: I. Survey overview and T0002 release sample"
    http://arxiv.org/abs/astro-ph/0610362

    Posted

  • klmasters by klmasters scientist, admin

    Very lovely. 😃

    Posted

  • Thomas_J by Thomas_J

    A great find...Stunning, too! 😃

    Posted

  • zutopian by zutopian

    Here is another image of the same lens. The elliptical is the target.
    http://talk.galaxyzoo.org/objects/AGZ0000jkc/discussions/DGZ10046tv

    Posted

  • zutopian by zutopian

    Here is the 3rd different image of that #arc / #lens.:
    http://talk.galaxyzoo.org/objects/AGZ0000jdk

    Posted

  • drphilmarshall by drphilmarshall scientist

    Great to see 0217 imaged in the IR! What is the filter combination used in this image? We made a model of this lens back in 2009: http://arxiv.org/abs/0902.4804 With the CANDELS IR data, the stellar mass of the lens galaxy should be able to be better measured, and the photometric redshift of the second lensed source should improve too. Source redshifts are important for using compound lenses like these to measure distances - and hence the expansion of the universe...

    Posted

  • PDXDave by PDXDave

    It's interesting to see the "before" and "after" of this lens. Looks like this image has quite a bit more information. And yet, it is not all that detailed at all.

    With the waiting list so long for telescope time, I wonder if there is any chance of a prolonged, detailed examination of this arc any time soon, by Hubble.

    Is it sufficiently interesting to justify it?

    Posted

  • drphilmarshall by drphilmarshall scientist

    Well, it's quite high magnification, which is what you need to be sensitive to small scale dark matter structures (dwarf galaxies and smaller) that cause tiny distortions in the arc shape. There are better candidates for that work though, I think - brighter arcs from the SLACS survey. This lens was actually re-discovered in ground-based imaging, and then re-imaged with HST for careful modelling. What we need HST for next is detailed observation of new types of lenses: lensed quasars that could have measurable time delays, or lensed high redshift galaxies. The latter might crop up in the CANDELS data here - for the former, you should keep up with the Lens Zoo at [http://blog.lenszoo.org]("Lens Zoo") as we build it!

    Posted

  • zutopian by zutopian

    Another image of the same lens:
    lens
    http://talk.galaxyzoo.org/objects/AGZ0000j8k

    Posted

  • jigorokane by jigorokane

    That's beautiful.

    Posted

  • AstroAbhi by AstroAbhi

    nice. its like a galaxy if forming

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  • ShortSighted by ShortSighted

    Flens plus chaos jamazing indeed.

    Posted

  • stealthinator00 by stealthinator00

    gravitational lensing . the centre galaxy must be really heavy and massive . it's gravity is warping the light from the background galaxy

    Posted