Decomposition of the Visible and Dark Matter Mass Profiles in the Einstein Ring 0047–2808
2004 ◽
Vol 220
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pp. 115-120
Keyword(s):
Using our semi-linear inversion method, we measure the mass profile of the lens galaxy in the Einstein ring system 0047–2808. The lens is modeled as a baryonic component following the observed light embedded in a generalised dark matter NFW halo. The semi-linear method makes full use of the information content in the ring image. We determine a B-band mass to light ratio for the baryons of 2.33+0.30–0.62h M⊙/LB⊙ (99% CL), accounting for 54% of the total projected mass within the Einstein radius of 1.16″. The inner logarithmic slope of the halo is found to be 0.65+0.73–0.31 (99% CL). We find that the halo is fairly well aligned with the light but has only half the ellipticity.
2013 ◽
Vol 349
(1)
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pp. 407-413
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Keyword(s):
2020 ◽
Vol 498
(1)
◽
pp. 702-717
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Keyword(s):