[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: Research - peer-reviewArticle

  • 15 Citations

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
continuums
observatory
radio
Seyfert galaxies
Infrared Astronomy Satellite
tracers
infrared spectroscopy
stars
thresholds
sensitivity
tracer
detection

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: Research - peer-reviewArticle

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
@article{30a323609ed14b87805008ac75e15045,
title = "[O I] 63 Micron emission from high- and low-luminosity active galactic nucleus galaxies",
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.",
keywords = "Galaxies: active, Galaxies: ISM, Infrared: galaxies",
author = "Dale, {Daniel A.} and George Helou and Brauher, {James R.} and Cutri, {Roc M.} and Sangeeta Malhotra and Beichman, {Charles A.}",
year = "2004",
month = "4",
doi = "10.1086/381959",
volume = "604",
pages = "565--571",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2 I",

}

TY - JOUR

T1 - [O I] 63 Micron emission from high- and low-luminosity active galactic nucleus galaxies

AU - Dale,Daniel A.

AU - Helou,George

AU - Brauher,James R.

AU - Cutri,Roc M.

AU - Malhotra,Sangeeta

AU - Beichman,Charles A.

PY - 2004/4/1

Y1 - 2004/4/1

N2 - 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.

AB - 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.

KW - Galaxies: active

KW - Galaxies: ISM

KW - Infrared: galaxies

UR - http://www.scopus.com/inward/record.url?scp=2642549002&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=2642549002&partnerID=8YFLogxK

U2 - 10.1086/381959

DO - 10.1086/381959

M3 - Article

VL - 604

SP - 565

EP - 571

JO - Astrophysical Journal

T2 - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2 I

ER -