Infrared Imaging of the Gravitational Lens PG 1115+080 with the Subaru Telescope
Abstract
We present high spatial resolution images of the gravitational-lens system PG 1115+080 taken with the near-infrared camera (CISCO) on the Subaru telescope. The FWHM of the combined image is 0.''32 in the K'-band, yielding spatial resolution of 0.''14 after a deconvolution procedure. This is a first detection of an extended emission adjacent to the A1/A2 components, indicating the presence of a fairly bright emission region with a characteristic angular radius of 5 mas (40 pc). The near-infrared image of the Einstein ring was extracted in both the J and K' bands. The J-K' color is found to be significantly redder than that of a synthetic model galaxy with an age of 3 Gyr, the age of the universe at the quasar redshift.
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