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

F. Iwamuro·K. Motohara·T. Maihara·J. Iwai·H. Tanabe·T. Taguchi·R. Hata·T. Terada·M. Goto·S. Oya·Subaru project team
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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 $\sim$ 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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F. Iwamuro, K. Motohara, T. Maihara, J. Iwai, H. Tanabe, T. Taguchi, R. Hata, T. Terada, M. Goto, S. Oya, Subaru project team. 2000-01-05. Infrared Imaging of the Gravitational Lens PG 1115+080 with the Subaru Telescope. https://doi.org/10.1093/pasj%2F52.1.25

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