Mid-Infrared Spectral Diagnostics of Luminous Infrared Galaxies

Petric, Andreea

doi:10.1063/1.3458566

Cited by 3 publications

(4 citation statements)

References 53 publications

(103 reference statements)

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“…Out of the 44 systems, 43 X-ray detections were recorded. The AGN fraction is 37 per cent when only the X-ray diagnostics were applied (X-ray colour and Fe Kα emission line), but this value increases to 48 per cent when supplemented by the mid-IR line diagnostics (e.g., [Ne v] λ14.3µm, Petric et al 2011). This AGN fraction is higher than that found in the lower-IR luminosity GOALS sample (Torres-Albà et al, 2018).…”

Section: C-goals: X-ray Follow-up Of Ir-bright Galaxiesmentioning

confidence: 79%

The quest for dual and binary supermassive black holes: A multi-messenger view

Rosa

Vignali

Bogdanović

et al. 2019

New Astronomy Reviews

190

123

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The quest for binary and dual supermassive black holes (SMBHs) at the dawn of the multi-messenger era is compelling. Detecting dual active galactic nuclei (AGN)-active SMBHs at projected separations larger than several parsecs-and binary AGN-probing the scale where SMBHs are bound in a Keplerian binary-is an observational challenge. The study of AGN pairs (either dual or binary) also represents an overarching theoretical problem in cosmology and astrophysics. The AGN triggering calls for detailed knowledge of the hydrodynamical conditions of gas in the imminent surroundings of the SMBHs and, at the same time, their duality calls for detailed knowledge on how galaxies assemble through major and minor mergers and grow fed by matter along the filaments of the cosmic web. This review describes the techniques used across the electromagnetic spectrum to detect dual and binary AGN candidates and proposes new avenues for their search. The current observational status is compared with the state-of-the-art numerical simulations and models for formation of dual and binary AGN. Binary SMBHs are among the loudest sources of gravitational waves (GWs) in the Universe. The search for a background of GWs at nHz frequencies from inspiralling SMBHs at low redshifts, and the direct detection of signals from their coalescence by the Laser Interferometer Space Antenna in the next decade, make this a theme of major interest for multi-messenger astrophysics. This review discusses the future facilities and observational strategies that are likely to significantly advance this fascinating field.

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Section: C-goals: X-ray Follow-up Of Ir-bright Galaxiesmentioning

confidence: 79%

The quest for dual and binary supermassive black holes: A multi-messenger view

Rosa

Vignali

Bogdanović

et al. 2019

New Astronomy Reviews

190

123

View full text Add to dashboard Cite

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“…High excitation lines such as [Ne v] at 14.3 and 24.3 µm (IP = 97.1 eV) can be used to identify elusive (i.e., obscured in the optical) AGN. In local LIRGs these lines are detected in approximately 20% of the nuclei (Petric et al 2011;Alonso-Herrero et al 2012). Also the [O iv] line at ∼ 25.9µm (IP = 54.9 eV) is found to correlate well with the AGN luminosity in Seyfert galaxies (Rigby et al 2009).…”

Section: Fine Structure Lines and H 2 Linesmentioning

confidence: 81%

“…On the other hand, the intensity of the [O iv] line (or the [Ne v] lines) relative to a line with a lower IP (generally the [Ne ii] line) and the equivalent width (EW) of a PAH feature (see also Sect. 2.3.2) can be used to estimate the fraction of the mid-IR emission contributed by the presence of an AGN (see Petric et al 2011;Alonso-Herrero et al 2012, and also Section 5.7). Examples of these diagnostic diagrams are shown in Fig.…”

Section: Fine Structure Lines and H 2 Linesmentioning

confidence: 99%

“…Using a variety of mid-IR diagnostics, Petric et al (2011) and Stierwalt et al (2013) concluded that only in approximately 10-20% of the GOALS sample the AGN dominates the mid-IR emission. Stierwalt et al (2013) found that the fraction of LIRGs with a mid-IR bright AGN stays approximately constant with the merger processes, whereas composite sources (those in which the AGN emission does not dominate in the mid-IR) show a marked increase at later merger stages.…”

Section: Fine Structure Lines and H 2 Linesmentioning

confidence: 99%

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Star formation and nuclear activity in luminous infrared galaxies: An infrared through radio review

Perez-Torres,

Mattila,

Alonso-Herrero

et al. 2020

Preprint

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Nearby galaxies offer unique laboratories allowing multi-wavelength spatially resolved studies of the interstellar medium, star formation and nuclear activity across a broad range of physical conditions. In particular, detailed studies of individual local luminous infrared galaxies (LIRGs) are crucial for gaining a better understanding of these processes and for developing and testing models that are used to explain statistical studies of large populations of such galaxies at high redshift for which it is currently impossible to reach a sufficient physical resolution. Here, we provide an overview of the impact of spatially resolved infrared, sub-millimetre and radio observations in the study of the interstellar medium, star formation and active galactic nuclei as well as their interplay in local LIRGs. We also present an overview of the modelling of their spectral energy distributions using state-of-the-art radiative transfer codes. These contribute necessary and powerful 'workhorse' tools for the study of LIRGs (and their more luminous counterparts) at higher redshifts which are unresolved in observations. We describe how spatially-resolved time domain observations have recently opened a new window to study the nuclear activity in LIRGs. We describe in detail the observational characteristics of Arp 299 which is one of the best studied local LIRGs and exemplifies the power of the combination of high-resolution observations at infrared to radio wavelengths together with radiative transfer modelling used to explain the spectral energy distributions of its different components. We summarise the previous achievements obtained using high-spatial

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GeV OBSERVATIONS OF STAR-FORMING GALAXIES WITH THEFERMILARGE AREA TELESCOPE

Ackermann¹,

Ajello²,

Allafort³

et al. 2012

ApJ

364

557

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Recent detections of the starburst galaxies M82 and NGC 253 by gamma-ray telescopes suggest that galaxies rapidly forming massive stars are more luminous at gamma-ray energies compared to their quiescent relatives. Building upon those results, we examine a sample of 69 dwarf, spiral, and luminous and ultraluminous infrared galaxies at photon energies 0.1-100 GeV using 3 years of data collected by the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope (Fermi). Measured fluxes from significantly detected sources and flux upper limits for the remaining galaxies are used to explore the physics of cosmic rays in galaxies. We find further evidence for quasi-linear scaling relations between gamma-ray luminosity and both radio continuum luminosity and total infrared luminosity which apply both to quiescent galaxies of the Local Group and lowredshift starburst galaxies (conservative P-values 0.05 accounting for statistical and systematic uncertainties). The normalizations of these scaling relations correspond to luminosity ratios of log(L 0.1−100 GeV /L 1.4 GHz ) = 1.7 ± 0.1 (statistical) ± 0.2 (dispersion) and log(L 0.1−100 GeV /L 8−1000 µm ) = −4.3 ± 0.1 (statistical) ± 0.2 (dispersion) for a galaxy with a star formation rate of 1 M ⊙ yr −1 , assuming a Chabrier initial mass function. Using the relationship between infrared luminosity and gamma-ray luminosity, the collective intensity of unresolved star-forming galaxies at redshifts 0 < z < 2.5 above 0.1 GeV is estimated to be 0.4-2.4 ×10 −6 ph cm −2 s −1 sr −1 (4-23% of the intensity of the isotropic diffuse component measured with the LAT). We anticipate that ∼ 10 galaxies could be detected by their cosmic-ray induced gamma-ray emission during a 10-year Fermi mission.

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Mid-Infrared Spectral Diagnostics of Luminous Infrared Galaxies

Cited by 3 publications

References 53 publications

The quest for dual and binary supermassive black holes: A multi-messenger view

The quest for dual and binary supermassive black holes: A multi-messenger view

Star formation and nuclear activity in luminous infrared galaxies: An infrared through radio review

GeV OBSERVATIONS OF STAR-FORMING GALAXIES WITH THEFERMILARGE AREA TELESCOPE

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