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Detection of Substructure in the Gravitationally Lensed Quasar MG0414+0534 using Mid-In... - 2 views

arxiv.org/1212.2166

substructure JWST

shared by Phil Marshall on 11 Dec 12 - No Cached

Phil Marshall on 11 Dec 12

MacLeod, Ramsey, Agol & Kochanek use a high resolution 11.2 micron image of MG0414 taken with Michelle on Gemini North to investigate a lens model that includes an additional (third) mass component near to the merging pair of images. The radio and mid IR positions and flux ratios constrain the substructure's Einstein mass to be 10^(7.3+/0.2)Msun. They do not extrapolate to its halo mass, or consider the possibility that it is not at the lens redshift (0.96), but it's a pretty solid detection. They point out how useful JWST will be for this kind of work in future.

<div class="cArrow"> </div><div class="cContentInner">MacLeod, Ramsey, Agol & Kochanek use a high resolution 11.2 micron image of MG0414 taken with Michelle on Gemini North to investigate a lens model that includes an additional (third) mass component near to the merging pair of images. The radio and mid IR positions and flux ratios constrain the substructure's Einstein mass to be 10^(7.3+/0.2)Msun. They do not extrapolate to its halo mass, or consider the possibility that it is not at the lens redshift (0.96), but it's a pretty solid detection. They point out how useful JWST will be for this kind of work in future.</div>

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