Optical Spectroscopy of Luminous Infrared Galaxies. II. Analysis of the Nuclear and Long-Slit Data

Veilleux, Sylvain; Kim, C. C.; Sanders, D. B.; Mazzarella, J. M.; Soifer, B. T.

doi:10.1086/192158

Cited by 571 publications

(858 citation statements)

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“…In this paper, we report the presence of spectral signatures of nuclear starburst in the infrared luminous Seyfert 2 galaxy NGC 7679, with the infrared luminosity, L IR , of 1.1 × 10 11 L (Veilleux et al 1995 ;Veron-Cetty & Veron 2000) and the redshift (z) 0.01714 (corresponding to a distance of 68.5 Mpc, for H 0 = 75 km s −1 Mpc −1 and q 0 = 0). NGC 7679 is one member of Arp 216, the other is NGC 7682, their projected separation is 89.6kpc (Arp 1966).…”

Section: Introductionmentioning

confidence: 90%

“…In the study of a sample of Seyfert 2 galaxies, Storchi-Bergmann et al (2000) and Gonzalez Delgado et al (2001) have found that about 30 to 50 % Seyfert 2 galaxies have nuclear starbursts. Since both of them might be related to gas inflow, which could be triggered by the axis-asymmetric perturbation (such as bars, tidal interactions or mergers), there is extensive speculation on the connection between starburst and nuclear activity (Norman & Scoville 1988;Terlevich Send offprint requests to: Qiusheng Gu, email: qsgu@nju.edu.cn et al 1990;Heckman et al 1995;Heckman et al 1997;Gonzalez Delgado 1998; and see the recent review by Veilleux 2000). Gu et al (2001) studied 51 Seyfert 2 galaxies from data available in the literature, and found that Seyfert 2 galaxies with no evidence of a hidden Seyfert 1 nucleus have characteristics in common with starburst galaxies.…”

Section: Introductionmentioning

confidence: 99%

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Nuclear Starburst Activity in the Seyfert 2 Galaxy NGC 2273

Shi

Lei

et al. 2003

Chin. J. Astron. Astrophys.

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Abstract. We present our recent spectrophotometric results of the infrared luminous Seyfert 2 galaxy NGC 7679. We find compelling evidence of the presence of a recent nuclear starburst, revealed by the observations of a) the spectral features of high order Balmer absorption lines, b) the weak equivalent widths for CaIIK λ3933, CN λ4200, G-band λ4300 and MgIb λ5173, and c) the suggested UV stellar wind resonance lines (N V λ1240, Si IV λ1400 and C IV λ1550) in the IUE spectrum. Using the simple stellar population synthesis model, we find that in the nuclear 2" × 2" region, the contributions from the old, intermediate and young components are 21.7%, 42.9% and 35.4%, respectively. These nuclear starburst activities might be triggered by the close encounter with NGC 7682, as suggested by recent numerical simulations.

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Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Nuclear Starburst Activity in the Seyfert 2 Galaxy NGC 2273

Shi

Lei

et al. 2003

Chin. J. Astron. Astrophys.

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“…Therefore they adopted a composite classification for the source, which might imply the presence of an AGN. Yuan et al (2010) found that in the IR luminosity bin L L 10 10 IR 11 12 -=  about 37% of the objects in the IRAS Bright Galaxy Sample (BGS, Sanders et al 1995;Veilleux et al 1995) are classified as composites.…”

Section: Optical and Radio Emissionmentioning

confidence: 99%

“…The contribution of AGNs to the overall luminosity of U/ LIRGs has been shown to increase with the IR luminosity of the system (e.g., Veilleux et al 1995Veilleux et al , 1999Imanishi 2009;Imanishi et al 2010aImanishi et al , 2010bNardini et al 2010;AlonsoHerrero et al 2012;Ichikawa et al 2014). Due to the great opacity of the nuclear region, a clear identification of AGNs in U/LIRGs is often complicated.…”

Section: Introductionmentioning

confidence: 99%

NuSTAR UNVEILS A HEAVILY OBSCURED LOW-LUMINOSITY ACTIVE GALACTIC NUCLEUS IN THE LUMINOUS INFRARED GALAXY NGC 6286

Ricci

Bauer

Treister

et al. 2016

ApJ

Self Cite

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We report the detection of a heavily obscured active galactic nucleus (AGN) in the luminous infrared galaxy (LIRG) NGC 6286 identified in a 17.5 ks Nuclear Spectroscopic Telescope Array observation. The source is in an early merging stage and was targeted as part of our ongoing NuSTAR campaign observing local luminous and ultraluminous infrared galaxies in different merger stages. NGC 6286 is clearly detected above 10 keV and by including the quasi-simultaneous Swift/XRT and archival XMM-Newton and Chandra data, we find that the source is heavily obscured (N H ;(0.95−1.32) × 10 24 cm −2 ) with a column density consistent with being Compton-thick (CT, N log cm 24The AGN in NGC 6286 has a low absorption-corrected luminosity (L 2−10 keV ∼ 3 −20 × 10 41 erg s −1 ) and contributes 1% to the energetics of the system. Because of its low luminosity, previous observations carried out in the soft X-ray band (<10 keV) and in the infrared did not notice the presence of a buried AGN. NGC 6286 has multiwavelength characteristics typical of objects with the same infrared luminosity and in the same merger stage, which might imply that there is a significant population of obscured low-luminosity AGNs in LIRGs that can only be detected by sensitive hard X-ray observations.

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“…A recent survey found LINERs in about 30% of 200 LIRGs selected from the IRAS Bright and IRAS Warm Galaxy Surveys (VeiUeux et al 1995). The fraction of LINERs in luminous infrared galaxies was also found to be independent of the absolute infrared luminosity (Veilleux et al 1995).…”

Section: Demographics Of Linersmentioning

confidence: 86%

The Nature of the Energy Source in LINERs

Colina

Koratkar

1997

International Astronomical Union Colloquium

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Abstract.LINERs are found in ,,,30% of all bright galaxies, including luminous infrared galaxies. They form a heterogeneous class powered by a variety of ionizing mechanisms such as low-luminosity AGNs, starbursts, shocks, or any combination of these.In early-type spirals, LINERs are powered by a low-luminosity AGN, or by an AGN surrounded by circumnuclear star-forming regions. In luminous infrared galaxies, LINERs are powered by starbursts with associated wind-related extended shocks, and an AGN may play a minor role, if any. LINERs in some FR I radio galaxies show a strong evidence for the presence of a massive central black hole, and there are indications for the existence of shocks in the nuclear disks of these galaxies. Yet, the dominant ionizing mechanism for LINERs in radio-quiet enipticals and FR I host galaxies is still unclear.Multifrequency high spatial resolution imaging and spectroscopy are essential to discriminate among the different ionizing mechanisms present in LINERs.

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Optical Spectroscopy of Luminous Infrared Galaxies. II. Analysis of the Nuclear and Long-Slit Data

Cited by 571 publications

References 0 publications

Nuclear Starburst Activity in the Seyfert 2 Galaxy NGC 2273

Nuclear Starburst Activity in the Seyfert 2 Galaxy NGC 2273

NuSTAR UNVEILS A HEAVILY OBSCURED LOW-LUMINOSITY ACTIVE GALACTIC NUCLEUS IN THE LUMINOUS INFRARED GALAXY NGC 6286

The Nature of the Energy Source in LINERs

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