Abundance Patterns in the Interstellar Medium of the S0 Galaxy NGC 1316 (Fornax A) Revealed with Suzaku

DOI DOI PDF 被引用文献2件 オープンアクセス
  • Saori Konami
    1Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601
  • Kyoko Matsushita
    1Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601
  • Ryo Nagino
    1Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601
  • Makoto S. Tashiro
    3Department of Physics, Saitama University, 225 Shimo-Okubo, Sakura, Saitama 338-8570
  • Toru Tamagawa
    1Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601
  • Kazuo Makishima
    2Cosmic Radiation Laboratory, the Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama 351-0198 konami@crab.riken.jp

この論文をさがす

説明

<jats:title>Abstract</jats:title> <jats:p>The Suzaku X-ray satellite observed the nearby S0 galaxy NGC 1316, a merger remnant aged 3 Gyr. The total good exposure time was 48.7 ks. The spectra were well represented by a two-temperature thermal model for the interstellar medium (ISM) plus a power-law model. The cool and hot temperatures of the thermal model were 0.48$\ \pm\ $0.03 and 0.92$\ \pm\ $0.04 keV, respectively. The excellent spectral sensitivity of Suzaku enables us for the first time to measure the metal abundances of O, Ne, Mg, Si, and Fe in the ISM. The resultant abundance pattern of O, Ne, Mg, Si, and Fe is close to that of the new solar abundance determined by Lodders (2003, ApJ, 591, 1220). The measured abundance pattern is compared with those of elliptical galaxies and an S0 galaxy, observed with Suzaku. Considering metal-enrichment from present Type Ia supernovae, the near-solar abundance pattern of the ISM in NGC 1316 indicates an enhanced $\alpha/$Fe ratio of stellar materials in the entire galaxy, like in giant elliptical galaxies.</jats:p>

収録刊行物

被引用文献 (2)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ