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Astron. Astrophys. 331, L73-L76 (1998)

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Letter to the Editor

Extended emission-line gas in the high luminosity, low redshift QSO E1821+643

J.W. Fried

Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany (e-mail: fried@mpia-hd.mpg.de)

Received 21 November 1997 / Accepted 23 December 1997


The luminous RQQ E1821+643 has many properties of radio-loud quasars but is classified as radio-quiet. We have obtained an off-nuclear spectrum which shows extended emission line gas (EELG) associated with the QSO. The luminosity in extended [OIII] is about 2 orders of magnitude higher than what is typically found for radio-quiet QSOs, and is in the range of luminosities typical of radio-loud quasars. The luminosity of the EELG is another property that E1821+643 has in common with RLQs. There is no evidence for a cooling flow, suggesting that the extra-nuclear gas results from tidal interaction.

Key words: AGN – quasars – host galaxies – extended emission line gas – tidal interactions – cooling flows

Send offprint requests to: J.W. Fried

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© European Southern Observatory (ESO) 1998

Online publication: March 3, 1998