The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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The Emission-line Properties of Young Radio Galaxies

  • Son, Dong-Hoon (Department of Physics and Astronomy, Seoul National University) ;
  • Woo, Jong-Hak (Department of Physics and Astronomy, Seoul National University) ;
  • Bennert, Vardha N. (Department of Physics, University of California Santa Barbara) ;
  • Fu, Hai (Astronomy Department, California Institute of Technology Research) ;
  • Nagao, Tohru (The Hakubi Project, Kyoto University) ;
  • Park, Dae-Seong (Department of Physics and Astronomy, Seoul National University)
  • Published : 2011.10.05
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Abstract

To investigate the properties of the narrow-line regions and the accretion disks of YRGs, we study a sample of 28 young radio galaxies (YRGs) observed with the Kast Double Spectrograph at the Shane 3-m telescope and with the DBSP (Double Spectrograph for the Palomar 200-inch Telescope) at Palomar observatory. In addition we collect an addition sample of 15 YRGs with the optical spectra from the SDSS archive. We present the measured narrow-line region properties based on the various emission line ratios, i.e., [O III]/$H{\beta}$, [N II]/$H{\alpha}$, [S II] 6716/6731, [O I]/[O III], [O II]/[O III] and [Ar III]/[O III], which are useful to constrain the gas properties and the states of the accretion disk. We will discuss the characteristics of YRG.

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