Probing Star Formation in Ultraluminous Infrared Galaxies Using AKARI Near-Infrared Spectroscopy

機関リポジトリ

この論文をさがす

説明

SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe (June 18-21, 2013. Ito Hall, the University of Tokyo), Bunkyou-ku, Tokyo, Japan

We carried out systematic observations of the HI recombination line Bra (4.05 μm) in nearby (z less than 0.3) ultraluminous infrared galaxies (ULIRGs), using AKARI near-infrared 2.5-5.0 μm spectroscopy. We derived star formation rates (SFRs) from the Bra line, whose observed flux is predicted to be the highest among HI recombination lines in conditions with large dust extinction (visual extinction Av greater than 15 mag) expected in ULIRGs. Using the 3.3 μm polycyclic aromatic hydrocarbon emission in addition to the Bra line as an indicator of the SFR, we estimated the contribution of the star formation to the total infrared luminosity in 51 ULIRGs. The contribution was on average 28 plus or minus4 0/o in ULIRGs optically classified as H II, while 14 plus or minus2 0/o in ULIRGs optically classified as LINER or Seyfert. This result indicates that the star formation is significantly active in H II ULIRGs and other energy source, i.e. active galactic nuclei, is needed in LINER ULIRGs.

形態: カラー図版あり

Physical characteristics: Original contains color illustrations

資料番号: AA1730027026

レポート番号: JAXA-SP-17-010E

収録刊行物

詳細情報 詳細情報について

  • CRID
    1050292561233980160
  • NII論文ID
    120006827233
  • ISSN
    24332232
  • Web Site
    http://id.nii.ac.jp/1696/00002997/
  • 本文言語コード
    en
  • 資料種別
    conference paper
  • データソース種別
    • IRDB
    • CiNii Articles

問題の指摘

ページトップへ