Narrow-line region of two radio-quiet quasars

  • Oh, Se-MYeong (Department of Physics and Astronomy, Seoul National University) ;
  • Woo, Jong-Hak (Department of Physics and Astronomy, Seoul National University) ;
  • Bennert, Vardha (Department of Physics, University of California, Santa Barbara)
  • Published : 2011.04.05

Abstract

We investigate the radial properties of the narrow-line region (NLR) in two radio-quiet quasars, PG1012+008 and PG1307+085, using the spectra obtained with the FORS1 at the Very Large Telescope. These high quality spectra with seeing < 0.6" enable us to extract seven two-pixel (0.4") spectra as a function of the radial distance from the accretion disk. In contrast to [OIII] narrow-band imaging, which can be contaminated by starbursts, shock-ionized gas, and tidal tails, we use emission-line diagnostic to determine the true size of the AGN-excited NLR. In this poster, we present the results based on the radial variance of $H{\beta}$ to [OIII] ${\lambda}5007$ ratio. For both targets, the [OIII] emission line exhibits a blue wing, suggesting an outflow of gas. In the case of PG1307+085, the blue wing disappears at the distance of 1". We will discuss the properties of the NLR in detail.

Keywords