The Keck/OSIRIS Nearby AGN Survey (KONA). I. The Nuclear K-band Properties of Nearby AGN*

Müller–Sánchez, F.; Hicks, E. K. S.; Malkan, M. A.; Davies, R. I.; Yu, Po-Chieh; Shaver, Skylar; Davis, Benjamin L.

doi:10.3847/1538-4357/aab9ad

Cited by 37 publications

(35 citation statements)

References 82 publications

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“…Since the thermal AGN emission arises from reprocessing of more energetic photons, a correlation between the nuclear 2-10 keV X-ray nuclear and NIR fluxes is expected. This correlation has been observed in previous works for more luminous AGNs Alonso-Herrero et al 2001;Burtscher et al 2015;Müller-Sánchez et al 2018). Figure 8 shows the correlation for NIR and nuclear 2-10 keV X-ray luminosities and fluxes for our data -we include all 15 galaxies, but code the data points according to the robustness of their detections, with magenta points being the most robust.…”

Section: Robustness Of Detection and Final Nir Fluxessupporting

confidence: 80%

“…This emission may arise at the dust sublimation radius, where dust can be heated up to 2000 K (Laor & Draine 1993;Kobayashi et al 1993;Alonso-Herrero et al 1996;Riffel et al 2009;Kishimoto et al 2011). This NIR emission also seems to be correlated with X-ray emission (Kotilainen et al 1992;Alonso-Herrero et al 1996;Civano et al 2012;Burtscher et al 2015;Müller-Sánchez et al 2018), supporting this dust emission picture. In lower luminosity systems, the development of NIR integral field spectrographs has enabled spectral separation of stellar and AGN emission (Davies et al 2007;Riffel et al 2010;Burtscher et al 2015;Müller-Sánchez et al 2018).…”

Section: Introductionmentioning

confidence: 68%

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Surprisingly Strong K-band Emission Found in Low-luminosity Active Galactic Nuclei

Dumont

Seth

Strader

et al. 2019

ApJ

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We examine the near-infrared (NIR) emission from low-luminosity AGNs (LLAGNs). Our galaxy sample includes 15 objects with detected 2-10 keV X-ray emission, dynamical black hole mass estimates from the literature, and available Gemini/NIFS integral field spectroscopy (IFU) data. We find evidence for red continuum components at the center of most galaxies, consistent with the hot dust emission seen in higher luminosity AGN. We decompose the spectral data cubes into a stellar and continuum component, assuming the continuum component comes from thermal emission from hot dust. We detect nuclear thermal emission in 14 out of 15 objects. This emission causes weaker CO absorption lines and redder continuum (2.05 − 2.28 µm) in our K-band data, as expected from hot dust around an AGN. The NIR emission is clearly correlated with the 210 keV X-ray flux, with a Spearman coefficient of r spearman = 0.69 suggesting a > 99% significance of correlation, providing further evidence of an AGN origin. Our sample has typical X-ray and NIR fluxes 3 − 4 orders of magnitude less luminous than previous work studying the NIR emission from AGN. We find that the ratio of NIR to X-ray emission increases towards lower Eddington ratios. The NIR emission in our sample is often brighter than the X-ray emission, with our K band AGN luminosities comparable to or greater than the 2-10 keV X-ray luminosities in all objects with Eddington ratios below 0.01%. The nature of this LLAGN NIR emission remains unclear, with one possibility being an increased contribution from jet emission at these low luminosities. These observations suggest JWST will be a useful tool for detecting the lowest luminosity AGN.

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Section: Robustness Of Detection and Final Nir Fluxessupporting

confidence: 80%

Section: Introductionmentioning

confidence: 68%

Surprisingly Strong K-band Emission Found in Low-luminosity Active Galactic Nuclei

Dumont

Seth

Strader

et al. 2019

ApJ

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“…Guainazzi et al (2005) classified its nucleus as a Compton-thin but highly absorbed (N H ∼ 5 × 10 23 cm −2 ) source. Müller-Sánchez et al (2018) suggested the presence of a double nucleus in this galaxy based on the nonpoint-like shape of their 2.12 µm continuum.…”

Section: Ngc 7465 (Mrk 313)mentioning

confidence: 87%

Searching for molecular gas inflows and outflows in the nuclear regions of five Seyfert galaxies

Domínguez-Fernández

Alonso‐Herrero

García‐Burillo

et al. 2020

A&A

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Active galactic nucleus (AGN) driven outflows are believed to play an important role in regulating the growth of galaxies, mostly via negative feedback. However, their effects on their hosts are far from clear, especially for low- and moderate-luminosity Seyferts. To investigate this issue, we obtained cold molecular gas observations, traced by the CO(2-1) transition, using the NOEMA interferometer of five nearby (distances between 19 and 58 Mpc) Seyfert galaxies. The resolution of ∼0.3–0.8 (∼30–100 pc) and field of view of NOEMA allowed us to study the CO(2-1) morphology and kinematics in the nuclear regions (∼100 pc) and up to radial distances of ∼900 pc. We detected CO(2-1) emission in all five galaxies with disky or circumnuclear ring-like morphologies. We derived cold molecular gas masses on nuclear (∼100 pc) and circumnuclear (∼650 pc) scales in the range from 106 to 107 M⊙ and from 107 to 108 M⊙, respectively. In all of our galaxies, the bulk of this gas is rotating in the plane of the galaxy. However, noncircular motions are also present. In NGC 4253, NGC 4388, and NGC 7465, we can ascribe the streaming motions to the presence of a large-scale bar. In Mrk 1066 and NGC 4388, the noncircular motions in the nuclear regions are explained as outflowing material due to the interaction of the AGN wind with molecular gas in the galaxy disk. We conclude that for an unambiguous and precise interpretation of the kinematics of the cold molecular gas, we need detailed knowledge of the host galaxy (i.e., presence of bars, interactions, etc.), and also of the ionized gas kinematics and ionization cone geometry.

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“…On one hand, spatially resolved spectroscopy based on [O III] kinematics mapped the velocity structure in the NLR (e.g., Crenshaw & Kraemer 2000;Fischer et al 2013). More detailed studies of gas kinematics and star formation became possible thanks to the integral field spectroscopy (e.g., Nesvadba et al 2006;Harrison et al 2014;Karouzos et al 2016a,b;Bae et al 2017;Wylezalek et al 2017;Müller-Sánchez et al 2018;Freitas et al 2018). On the other hand, more systematic studies of [O III] kinematics were based on the spatially integrated spectra obtained from large sur-veys since a large sample of AGNs can be utilized, revealing that outflows are prevalent, particularly among luminous AGNs (e.g., Mullaney et al 2013;Bae & Woo 2014;Woo et al 2016;Shen et al 2016;Woo et al 2017;Zhang & Feng 2017;Wang et al 2018;DiPompeo et al 2018).…”

Section: Introductionmentioning

confidence: 99%

A Census of Ionized Gas Outflows in Type 1 AGNs: Gas Outflows in AGNs. V.

Rakshit

Woo

2018

ApJ

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We present a systematic study of ionized gas outflows based on the velocity shift and dispersion of the [O III] λ5007Å emission line, using a sample of ∼ 5000 Type 1 AGNs at z < 0.3 selected from Sloan Digital Sky Survey. This analysis is supplemented by the gas kinematics of Type 2 AGNs from Woo et al. (2016). For the majority of Type 1 AGNs (i.e., ∼ 89%), the [O III] line profile is best represented by a double Gaussian model, presenting the kinematic signature of the non-virial motion. Blueshifted [O III] is more frequently detected than redshifted [O III] by a factor of 3.6 in Type 1 AGNs, while the ratio between blueshifted to redshifted [O III] is only 1.08 in Type 2 AGNs due to the projection and orientation effect. The fraction of AGNs with outflow signatures is found to increase steeply with [O III] luminosity and Eddington ratio, while Type 1 AGNs have larger velocity dispersion and more negative velocity shift than Type 2 AGNs. The [O III] velocity − velocity dispersion (VVD) diagram of Type 1 AGNs expands towards higher values with increasing luminosity and Eddington ratio, suggesting that the radiation pressure or wind is the main driver of gas outflows, as similarly found in Type 2 AGNs. In contrast, the kinematics of gas outflows is not directly linked to the radio activity of AGN.

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The Keck/OSIRIS Nearby AGN Survey (KONA). I. The Nuclear K-band Properties of Nearby AGN*

Cited by 37 publications

References 82 publications

Surprisingly Strong K-band Emission Found in Low-luminosity Active Galactic Nuclei

Surprisingly Strong K-band Emission Found in Low-luminosity Active Galactic Nuclei

Searching for molecular gas inflows and outflows in the nuclear regions of five Seyfert galaxies

A Census of Ionized Gas Outflows in Type 1 AGNs: Gas Outflows in AGNs. V.

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