The nuclear and extended infrared emission of the Seyfert galaxy NGC 2992 and the interacting system Arp 245

García-Bernete, I.; Almeida, C. Ramos; Acosta–Pulido, J. A.; Alonso‐Herrero, A.; Sánchez‐Portal, M.; Castillo, M.; Pereira-Santaella, M.; Esquej, P.; González‐Martín, O.; Díaz-Santos, T.; Roche, P. F.; Fisher, S.; Pović, M.; García, Ana María Pérez; Valtchanov, I.; Packham, C.; Levenson, N. A.

doi:10.1093/mnras/stv338

Cited by 30 publications

(27 citation statements)

References 103 publications

(146 reference statements)

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“…Mrk 1066 was analyzed by Ramos and Alonso-Herrero et al (2014) to study the survival of the responsible molecules for the 11.3 µm PAH feature in the close vicinity of an AGN. García-Bernete et al (2015) studied the extended emission of NGC 2992 up to ∼3 kpc, finding that PAH features might indicate that the bulk of this extended emission is dust heated by SF. Esquej et al (2014) compared nuclear with larger apertures (using Spitzer spectra) in 12 of our sources to study the correlation between SFR through the 11.3 µm PAH feature and AGN accretion.…”

Section: Samplementioning

confidence: 99%

Circumnuclear Star Formation and AGN Activity: Clues from Surface Brightness Radial Profile of PAHs and [ S IV ]

Esparza-Arredondo

González‐Martín

Dultzin

et al. 2018

ApJ

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We studied the circumnuclear MIR emission in a sample of 19 local active galactic nuclei (AGN) with high spatial resolution spectra using T-ReCS (Gemini) and CanariCam (GTC), together with IRS/Spitzer observations. We measured the flux and the equivalent width for the 11.3 µm PAH feature and the [SIV] line emission as a function of galactocentric distance. This allowed to study the star formation (SF) at sub-kpc scales from the nucleus for a large sample of nearby AGN. The [SIV] line emission could be tracing the AGN radiation field within a few thousand times the sublimation radius (R sub ), but it often peaks at distances greater than 1000 R sub . One possibility is that the SF is contributing to the [SIV] total flux. We found an 11.3 µm PAH emission deficit within the inner few tens of parsecs from the AGN. This deficit might be due to the destruction of the molecules responsible for this feature or the lack of SF at these distances. We found a sensible agreement in the expected shift of the relation of the AGN bolometric luminosity and the SF rate. This indicates that numerical models attributing the link between AGN activity and host galaxy growth to mergers are in agreement with our data, for most inner galaxy parts.

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Section: Samplementioning

confidence: 99%

Circumnuclear Star Formation and AGN Activity: Clues from Surface Brightness Radial Profile of PAHs and [ S IV ]

Esparza-Arredondo

González‐Martín

Dultzin

et al. 2018

ApJ

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“…This method has been widely tested in ground-based MIR images (e.g. Soifer et al 2000;Radomski et al 2002Radomski et al , 2003Levenson et al 2009;Ramos Almeida et al 2009, 2011aMason et al 2012;García-Bernete et al 2015;Martínez-Paredes et al 2015). The MIR nuclear fluxes calculated using this method are listed in Table 2.…”

Section: Subarcsecond Resolution Nuclear Fluxes: Subtraction Of Scalementioning

confidence: 99%

“…Considering the strong 6.2 and 11.3 µm PAH features seen in the Spitzer/IRS spectrum, the bulk of this extended emission is likely produced by dust heated by SF activity. See García-Bernete et al (2015) for a detailed study of this galaxy.…”

Section: Appendix C: Notes On Individual Objectsmentioning

confidence: 99%

“…Prominent features in the MIR spectrum of AGN are the 9.7 µm silicate feature, and the Polycyclic Aromatic Hydrocarbon (PAH) emission bands, although the latter can be diluted by the bright AGN continuum (see e.g. Esquej et al 2014;Alonso-Herrero et al 2014;Ramos Almeida et al 2014;García-Bernete et al 2015). The PAH features are often used as indicators of the star formation rate (SFR) of galaxies (see e.g.…”

Section: Introductionmentioning

confidence: 99%

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The nuclear and extended mid-infrared emission of Seyfert galaxies

García-Bernete¹,

Almeida²,

Acosta–Pulido³

et al. 2016

Mon. Not. R. Astron. Soc.

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We present subarcsecond resolution mid-infrared (MIR) images obtained with 8-10 m-class ground-based telescopes of a complete volume-limited (D L <40 Mpc) sample of 24 Seyfert galaxies selected from the Swift/BAT nine month catalog. We use those MIR images to study the nuclear and circumnuclear emission of the galaxies. Using different methods to classify the MIR morphologies on scales of ∼400 pc, we find that the majority of the galaxies (75-83%) are extended or possibly extended and 17-25% are point-like. This extended emission is compact and it has low surface brightness compared with the nuclear emission, and it represents, on average, ∼30% of the total MIR emission of the galaxies in the sample. We find that the galaxies whose circumnuclear MIR emission is dominated by star formation show more extended emission (650±700 pc) than AGN-dominated systems (300±100 pc). In general, the galaxies with point-like MIR morphologies are face-on or moderately inclined (b/a∼0.4-1.0), and we do not find significant differences between the morphologies of Sy1 and Sy2. We used the nuclear and circumnuclear fluxes to investigate their correlation with different AGN and SF activity indicators. We find that the nuclear MIR emission (the inner ∼70 pc) is strongly correlated with the X-ray emission (the harder the X-rays the better the correlation) and with the [O IV] λ25.89 µm emission line, indicating that it is AGN-dominated. We find the same results, although with more scatter, for the circumnuclear emission, which indicates that the AGN dominates the MIR emission in the inner ∼400 pc of the galaxies, with some contribution from star formation.

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“…Alonso-Herrero et al (2012) and García-Bernete et al (2015) found that the AGN emission does not dominate the 70 µm emission of NGC 1365 and NGC 2992, respectively. These two galaxies do not satisfy any of our selection criteria.…”

Section: Comparison With Other Workmentioning

confidence: 95%

The nuclear and integrated far-infrared emission of nearby Seyfert galaxies

García‐González

Alonso‐Herrero

Hernán-Caballero

et al. 2016

Mon. Not. R. Astron. Soc.

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We present far-infrared (FIR) 70 − 500 µm imaging observations obtained with Herschel/PACS and SPIRE of 33 nearby (median distance of 30 Mpc) Seyfert galaxies from the Revised Shapley-Ames (RSA) catalogue. We obtain the FIR nuclear (r = 1 kpc and r = 2 kpc) and integrated spectral energy distributions (SEDs). We estimate the unresolved nuclear emission at 70 µm and we fit the nuclear and integrated FIR SEDs with a grey body model. We find that the integrated FIR emission of the RSA Seyferts in our sample is dominated by emission from the host galaxy, with dust properties similar to those of normal galaxies (non AGN). We use four criteria to select galaxies whose nuclear 70 µm emission has a significant AGN contribution: (1) elevated 70/160 µm flux ratios, (2)spatially resolved, high dust temperature gradient, (3) 70 µm excess emission with respect to the fit of the FIR SEDs with a grey body, and (4) excess of nuclear SFR obtained from 70 µm over SFR from mid-infrared indicators. 16 galaxies (48 per cent of the initial sample) satisfy at least one of these conditions, whereas 10 satisfy half or more. After careful examination of these, we select six bona fide candidates (18 per cent of the initial sample) and estimate that ∼ 40 − 70 per cent of their nuclear (r = 1 − 2 kpc) 70 µm emission is contributed by dust heated by the AGN.

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The nuclear and extended infrared emission of the Seyfert galaxy NGC 2992 and the interacting system Arp 245

Cited by 30 publications

References 103 publications

Circumnuclear Star Formation and AGN Activity: Clues from Surface Brightness Radial Profile of PAHs and [ S IV ]

Circumnuclear Star Formation and AGN Activity: Clues from Surface Brightness Radial Profile of PAHs and [ S IV ]

The nuclear and extended mid-infrared emission of Seyfert galaxies

The nuclear and integrated far-infrared emission of nearby Seyfert galaxies

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