[O I] 63 Micron emission from high- and low-luminosity active galactic nucleus galaxies

Daniel A. Dale, George Helou, James R. Brauher, Roc M. Cutri, Sangeeta Malhotra, Charles A. Beichman

Research output: Contribution to journalArticle

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Abstract

The Infrared Space Observatory (ISO) was used to search for a tracer of the warm and dense neutral interstellar medium, the [O I] 63.18 μm line, in four ultraluminous IRAS sources lying at redshifts between 0.6 and 1.4. While these sources are quasars, their infrared continuum emission suggests a substantial interstellar medium. No [O I] flux was detected after probing down to a 3 σ sensitivity level sufficient for detecting line emission in starbursts with similar continuum emission. However, if the detection threshold is slightly relaxed, one target is detected with 2.7 σ significance. For this radio-quiet quasar, there is likely a substantial dense and warm interstellar medium; the upper limits for the three radio-loud sources do not preclude the same conclusion. Using a new, uniformly processed database of the ISO extragalactic far-infrared spectroscopy observations, we show that nearby Seyfert galaxies typically have higher [O I]-to-far-infrared ratios than do normal star-forming galaxies, so the lack of strong [O I] 63 μm emission from these high-redshift ultraluminous sources cannot be attributed to their active cores.

LanguageEnglish (US)
Pages565-571
Number of pages7
JournalAstrophysical Journal
Volume604
Issue number2 I
DOIs
StatePublished - Apr 1 2004
Externally publishedYes

Fingerprint

active galactic nuclei
luminosity
galaxies
Infrared Space Observatory (ISO)
quasars
observatory
radio
continuums
Seyfert galaxies
Infrared Astronomy Satellite
infrared spectroscopy
tracers
tracer
stars
thresholds
sensitivity

Keywords

  • Galaxies: active
  • Galaxies: ISM
  • Infrared: galaxies

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Dale, D. A., Helou, G., Brauher, J. R., Cutri, R. M., Malhotra, S., & Beichman, C. A. (2004). [O I] 63 Micron emission from high- and low-luminosity active galactic nucleus galaxies. Astrophysical Journal, 604(2 I), 565-571. DOI: 10.1086/381959

[O I] 63 Micron emission from high- and low-luminosity active galactic nucleus galaxies. / Dale, Daniel A.; Helou, George; Brauher, James R.; Cutri, Roc M.; Malhotra, Sangeeta; Beichman, Charles A.

In: Astrophysical Journal, Vol. 604, No. 2 I, 01.04.2004, p. 565-571.

Research output: Contribution to journalArticle

Dale, DA, Helou, G, Brauher, JR, Cutri, RM, Malhotra, S & Beichman, CA 2004, '[O I] 63 Micron emission from high- and low-luminosity active galactic nucleus galaxies' Astrophysical Journal, vol 604, no. 2 I, pp. 565-571. DOI: 10.1086/381959
Dale DA, Helou G, Brauher JR, Cutri RM, Malhotra S, Beichman CA. [O I] 63 Micron emission from high- and low-luminosity active galactic nucleus galaxies. Astrophysical Journal. 2004 Apr 1;604(2 I):565-571. Available from, DOI: 10.1086/381959
Dale, Daniel A. ; Helou, George ; Brauher, James R. ; Cutri, Roc M. ; Malhotra, Sangeeta ; Beichman, Charles A./ [O I] 63 Micron emission from high- and low-luminosity active galactic nucleus galaxies. In: Astrophysical Journal. 2004 ; Vol. 604, No. 2 I. pp. 565-571
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