Infrared Imaging of the Gravitational Lens PG 1115+080 with the Subaru Telescope

Details Infrared Imaging of the Gravitational Lens PG 1115+080 with the Subaru Telescope Infrared Imaging of the Gravitational Lens PG 1115+080 with the Subaru Telescope

2000-01-05

arxiv.org/abs/astro-ph/0001051v1

Astronomy and Astrophysics

Astrophysics

11 pages, 6 figures. Accepted for publication in PASJ(2000)

Scientific paper

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 $\sim$ 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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