Infrared Imaging of the Gravitational Lens PG 1115+080 with the Subaru Telescope
/ Authors
F. Iwamuro, K. Motohara, T. Maihara, J. Iwai, H. Tanabe, T. Taguchi, R. Hata, T. Terada, M. Goto, S. Oya
and 1 more author
/ 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.
Journal: Publications of the Astronomical Society of Japan
DOI: 10.1093/pasj/52.1.25