Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 411, Issue 1, Pages L6-L10Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1745-3933.2010.00980.x
Keywords
galaxies: elliptical and lenticular, cD
Categories
Funding
- NSF [NSF-0642621]
- Packard Foundation
- Kavli Foundation
- Science and Technology Facilities Council [ST/H00243X/1] Funding Source: researchfish
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We use Keck laser guide star adaptive optics imaging and exploit the magnifying effects of strong gravitational lensing (the effective resolution is FWHM approximate to 200 pc) to investigate the sub-kpc scale of an intermediate-redshift (z = 0.63), massive early-type galaxy being lensed by a foreground early-type galaxy; we dub this class of strong gravitational lens systems EELs, i.e. early-type/early-type lenses. We find that the background source is massive (M-* = 10(10.9)M(circle dot)) and compact (r(e) = 1.1 kpc), and a two-component fit is required to model accurately the surface brightness distribution, including an extended low-surface-brightness component. This extended component may arise from the evolution of higher redshift 'red nuggets' or may already be in place at z similar to 2 but is unobservable due to cosmological surface brightness dimming.
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