Accurate redshifts and classifications for 110 radio-loud active galactic nuclei

Michael Eracleous, Jules P. Halpern

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

We report accurate redshifts of 110 active galaxies (mostly radio-loud objects at z < 0.4) observed in the course of a survey to find broad, double-peaked emission lines. These redshifts are measured from the narrow emission lines of these objects and are accurate to at least one part in 10 4. For each object we determine a redshift from high- and low-ionization lines separately, as well as an average redshift from all the available lines. We find that in about 15% of cases, the low-ionization lines yield a slightly higher redshift than the high-ionization lines; the average redshift difference amounts to a velocity difference of approximately 80 km s -1. In addition to the redshift measurements we also report revised redshifts for two objects as well as new classifications for three narrow-line objects.

Original languageEnglish (US)
Pages (from-to)181-186
Number of pages6
JournalAstrophysical Journal, Supplement Series
Volume150
Issue number1
DOIs
StatePublished - Jan 1 2004

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active galactic nuclei
ionization
radio
active galaxies

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

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abstract = "We report accurate redshifts of 110 active galaxies (mostly radio-loud objects at z < 0.4) observed in the course of a survey to find broad, double-peaked emission lines. These redshifts are measured from the narrow emission lines of these objects and are accurate to at least one part in 10 4. For each object we determine a redshift from high- and low-ionization lines separately, as well as an average redshift from all the available lines. We find that in about 15{\%} of cases, the low-ionization lines yield a slightly higher redshift than the high-ionization lines; the average redshift difference amounts to a velocity difference of approximately 80 km s -1. In addition to the redshift measurements we also report revised redshifts for two objects as well as new classifications for three narrow-line objects.",
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Accurate redshifts and classifications for 110 radio-loud active galactic nuclei. / Eracleous, Michael; Halpern, Jules P.

In: Astrophysical Journal, Supplement Series, Vol. 150, No. 1, 01.01.2004, p. 181-186.

Research output: Contribution to journalArticle

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