Space Warps Talk

Subject: ASW0003oz4

Subject ASW0003oz4 Full subject data (JSON)

Comments

  • c_cld by c_cld

    #simfail, too wide ring, too thick for the enclosed galaxy

    Posted

  • Tom_Collett by Tom_Collett scientist

    looks like a good sim to me. The ring is about the correct thickness (the thickness depends on the source size not the lens)

    Posted

  • Tom_Collett by Tom_Collett scientist

    The Einstein radius looks pretty reasonable for a massive elliptical like this

    Posted

  • c_cld by c_cld

    circle diameter=37pix in image 440px for 74 arcsec
    gives radius=3.11arcsec which seems a bit upper than common figures

    Posted

  • c_cld by c_cld

    see similar lens galaxy/ Image ASW0003z46 but two simulated arcs with separation radius= 2.27arcsec

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  • Tom_Collett by Tom_Collett scientist

    yeah it's on the bigger side of reasonable, but 3 arcseconds is fine.

    Posted

  • Tom_Collett by Tom_Collett scientist

    For a real lens the radius depends on lens mass, (and on the source redshift; but this isn't very sensitive if zs > about 4*zl)

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  • Tom_Collett by Tom_Collett scientist

    3 arcseconds would mean that this galaxy would have to be one of the most massive isolated galaxies, but they do exist.

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  • Tom_Collett by Tom_Collett scientist

    Smaller Einstein radii are more common because the number of ellipticals as a function of mass falls sharply at the high mass end

    Posted