Kinematics of the ionized gas around the quasar MR 2251-178

P.S. Mulder, E. A. Valentijn

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

O III forbidden line observations of the nearby quasar MR 2251-178 were made with the Taurus II imaging Fabry-Perot instrument. The line emission around the quasar is found to consist of several regions of high surface brightness located in two half-cones with an opening angle of about 37 deg extending 12-16 kpc from the quasar. The velocity field of this region shows multiple velocity components at several positions. Emission line diagnostics indicate that both the central narrow-line region and the extended emission line region are most likely photo-ionized by radiation with a hard spectrum. The presence of a few line emitting 'blobs' further away from the quasar, at distances of 45 to 80 kpc and counter-rotating with respect to the gas nearby the quasar, is confirmed. Emission extending out to some 170 kpc from the quasar towards the SE as reported earlier is not observed.
Original languageEnglish
Pages (from-to)435-444
Number of pages10
JournalAstronomy & astrophysics
Volume259
Issue number2
Publication statusPublished - Jun-1992

Keywords

  • QUASARS, GENERAL
  • QUASARS, MR 2251-178
  • QUASARS, JETS OF
  • O-III EMISSION
  • RADIO GALAXIES
  • MR 2251-178
  • ACTIVE GALAXIES
  • IONIZATION
  • TAURUS

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