Infrared imaging of the gravitational lens PG 1115+080 with the Subaru telescope

Fumihide Iwamuro, Kentaro Motohara, Toshinori Maihara, Jun'ichi Iwai, Hirohisa Tanabe, Tomoyuki Taguchi, Ryuji Hata, Hiroshi Terada, Miwa Goto, Shin Oya, Masayuki Akiyama, Hiroyasu Ando, Tetsuo Aoki, Yoshihiro Chikada, Mamoru Doi, Takeo Fukuda, Masaru Hamabe, Masahiko Hayashi, Saeko S. Hayashi, Toshihiro HoraguchiShinichi Ichikawa, Takashi Ichikawa, Masatoshi Imanishi, Katsumi Imi, Motoko Inata, Shuzo Isobe, Yoichi Itoh, Masanori Iye, Norio Kaifu, Yukiko Kamata, Tomio Kanzawa, Hiroshi Karoji, Nobunari Kashikawa, Taichi Kato, Naoto Kobayashi, Yukiyasu Kobayashi, Keiichi Kodaira, George Kosugi, Tomio Kurakami, Yoshitaka Mikami, Akihiko Miyashita, Takashi Miyata, Satoshi Miyazaki, Yoshihiko Mizumoto, Masao Nakagiri, Koich Nakajima, Kyoko Nakamura, Kyoji Nariai, Eiji Nishihara, Jun Nishikawa, Shiro Nishimura, Tetsuo Nishimura, Tetsuo Nishino, Kunio Noguchi, Takeshi Noguchi, Jun'ichi Noumaru, Ryusuke Ogasawara, Norio Okada, Kiichi Okita, Koji Omata, Norio Oshima, Masashi Otsubo, Goro Sasaki, Toshiyuki Sasaki, Maki Sekiguchi, Kazuhiro Sekiguchi, Ian Shelton, Chris Simpson, Hiroshi Suto, Hideki Takami, Tadafumi Takata, Naruhisa Takato, Motohide Tamura, Kyoko Tanaka, Wataru Tanaka, Daigo Tomono, Yasuo Torii, Tomonori Usuda, Koichi Waseda, Juni'chi Watanabe, Masaru Watanabe, Masafumi Yagi, Takuya Yamashita, Yasumasa Yamashita, Naoki Yasuda, Michitoshi Yoshida, Shigeomi Yoshida, Masami Yutani

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)25-32
Number of pages8
JournalPublications of the Astronomical Society of Japan
Volume52
Issue number1
DOIs
Publication statusPublished - 2000

Keywords

  • Galaxies: structure
  • Gravitational lensing
  • Quasars: individual (PG 1115+080)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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