Linking Characteristics of the Polycyclic Aromatic Hydrocarbon Population with Galaxy Properties: A Quantitative Approach Using the NASA Ames PAH IR Spectroscopic Database

Abstract

Utilizing the data and tools provided through the NASA Ames PAH IR Spectroscopic Database (PAHdb), we study the PAH component of over 900 Spitzer-IRS galaxy spectra. Employing a database-fitting approach, the average PAH size, the PAH size distribution, and PAH ionization fraction are deduced. In turn, we examine their connection with the properties of the host galaxy. We found that PAH population within galaxies consists of middle-sized PAHs with an average number of carbon atoms of $\overline{N_C}$ = 55, and a charge state distribution of $\sim$40% ionized - 60% neutral. We describe a correlation between the 6.2/11.2 $\mu$m PAH ratio with the ionization parameter ($\gamma \equiv (G_0/n_{\mathrm{e}})(T_{\mathrm{gas}}/1\mathrm{K}{)}^{0.5}$), a moderate correlation between the 8.6/11.2 $\mu$m PAH ratio and specific star-formation rate, and a weak anti-correlation between $\gamma$ and M${}_{\ast }$. From the PAHdb decomposition we provide estimates for the 3.3 $\mu$m PAH band, not covered by Spitzer observations, and establish a correlation between the 3.3/11.2 $\mu$m PAH ratio with N${}_{\mathrm{C}}$. We further deliver a library of mid-IR PAH template spectra parameterized on PAH size and ionization fraction, which can be used in galaxy spectral energy distribution fitting codes for the modeling of the mid-IR PAH emission component in galaxies.

arXiv comment28 pages, 19 figures, 4 tables. Accepted for publication in ApJ

References in corpus (81)

• The Host Galaxies of AGN
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS
• The physical properties of star forming galaxies in the low redshift universe
• Theoretical Modeling of Starburst Galaxies
• Dust Grain Size Distributions and Extinction in the Milky Way, LMC, and SMC
• The Host Galaxies and Classification of Active Galactic Nuclei
• Infrared Emission from Interstellar Dust. IV. The Silicate-Graphite-PAH Model in the Post-Spitzer Era
• The reversal of the star formation-density relation in the distant universe
• Infrared Emission from Interstellar Dust. II. The Diffuse Interstellar Medium
• SINGS: The SIRTF Nearby Galaxies Survey
• What Powers Ultra-luminous IRAS Galaxies?
• The Mid-Infrared Spectrum of Star-Forming Galaxies: Global Properties of PAH Emission
• The Calibration of Mid-Infrared Star Formation Rate Indicators
• Modeling the Panchromatic Spectral Energy Distributions of Galaxies
• The Star-formation Mass Sequence out to z=2.5
• Calibrating Extinction-Free Star Formation Rate Diagnostics with 33GHz Free-Free Emission in NGC6946
• Observational evidence for AGN feedback in early-type galaxies
• Stellar Population Inference with Prospector
• Infrared Emission from Interstellar Dust. I. Stochastic Heating of Small Grains
• The rich 6 to 9 um spectrum of interstellar PAHs
• Optical Spectroscopy and Nebular Oxygen Abundances of the Spitzer/SINGS Galaxies
• Andromeda's Dust
• Observations of Ultraluminous Infrared Galaxies with the Infrared Spectrograph on the Spitzer Space Telescope II: The IRAS Bright Galaxy Sample
• The GALEX Arecibo SDSS Survey. I. Gas Fraction Scaling Relations of Massive Galaxies and First Data Release
• Modelling and interpreting spectral energy distributions of galaxies with BEAGLE
• A Two-Parameter Model for the Infrared/Submillimeter/Radio Spectral Energy Distributions of Galaxies and AGN
• GOALS: The Great Observatories All-Sky LIRG Survey
• The Calibration of Monochromatic Far-Infrared Star Formation Rate Indicators
• The CH out-of-plane bending modes of PAH molecules in astrophysical environments
• A large mid-infrared spectroscopic and near-IR imaging survey of ULIRGs: their nature and evolution
• Variations of the Mid-IR Aromatic Features Inside and Among Galaxies
• Pixie Dust: The Silicate Features in the Diffuse Interstellar Medium
• The Dust Attenuation Law in Galaxies
• The Behavior of the Aromatic Features in M101 HII Regions: Evidence for Dust Processing
• Spatially-Resolved Spectroscopic Properties of Low-Redshift Star-Forming Galaxies
• The Tully-Fisher relations of early-type spiral and S0 galaxies
• Dust Spectral Energy Distributions of Nearby Galaxies: an Insight from the Herschel Reference Survey
• The Infrared Spectra of Very Large Irregular Polycyclic Aromatic Hydrocarbons (PAHs): Observational Probes of Astronomical PAH Geometry, Size and Charge
• Calibrating Star Formation in WISE using Total Infrared Luminosity
• Predicting Quiescence: The Dependence of Specific Star Formation Rate on Galaxy Size and Central Density at 0.5<z<2.5
• A New Star-Formation Rate Calibration from Polycyclic Aromatic Hydrocarbon Emission Features and Application to High Redshift Galaxies
• The Spitzer Survey of the Small Magellanic Cloud (S3MC): Insights into the Life-Cycle of Polycyclic Aromatic Hydrocarbons
• The Mid-Infrared Spectra of Normal Galaxies
• The Spitzer Spectroscopic Survey of the Small Magellanic Cloud (S4MC): Probing the Physical State of Polycyclic Aromatic Hydrocarbons in a Low-Metallicity Environment
• Old and young stellar populations in DustPedia galaxies and their role in dust heating
• Mapping PAH sizes in NGC 7023 with SOFIA
• Nuclear 11.3$\mu$m PAH emission in local active galactic nuclei
• Variation of galactic cold gas reservoirs with stellar mass
• Theoretical ISM pressure and electron density diagnostics for local and high-redshift galaxies
• The PAH emission characteristics of the reflection nebula NGC2023
• Probing the size and charge of Polycyclic Aromatic Hydrocarbons
• All the PAHs: an AKARI-Spitzer Cross Archival Spectroscopic Survey of Aromatic Emission in Galaxies
• The Ionized Gas in Nearby Galaxies as Traced by the [NII] 122 and 205 μm Transitions
• The ALMaQUEST Survey: V. The non-universality of kpc-scale star formation relations and the factors that drive them
• Polycyclic Aromatic Hydrocarbons in Galaxies at z~0.1: the Effect of Star Formation and AGN
• Variations of the Mid-IR Emission Spectrum in Reflection Nebulae
• Infrared Luminosities and Aromatic Features in the 24um Flux Limited Sample of 5MUSES
• Polycyclic Aromatic Hydrocarbon and Mid-Infrared Continuum Emission in a z>4 Submillimeter Galaxy
• Fully anharmonic infrared cascade spectra of polycyclic aromatic hydrocarbons
• The 5.25 & 5.7 $\mu$m Astronomical Polycyclic Aromatic Hydrocarbon Emission Features
• High-resolution IR absorption spectroscopy of polycyclic aromatic hydrocarbons in the 3 micron region: role of hydrogenation and alkylation
• Spitzer Mapping of PAHs and H2 in Photodissociation Regions
• Coupled Blind Signal Separation and Spectroscopic Database Fitting of the Mid Infrared PAH Features
• PAHs and star formation in the HII regions of nearby galaxies M83 and M33
• Detections of water ice, hydrocarbons, and 3.3um PAH in z~2 ULIRGs
• The sub-galactic and nuclear main sequences for local star-forming galaxies
• Observations of the Near- to Mid-Infrared Unidentified Emission Bands in the Interstellar Medium of the Large Magellanic Cloud
• Examining the class B-to-A shift of the 7.7 $\mu$m PAH band with the NASA Ames PAH IR Spectroscopic Database
• A panchromatic spatially-resolved analysis of nearby galaxies -- I. Sub-kpc scale Main Sequence in grand-design spirals
• Identification of galaxies that experienced a recent major drop of star formation
• Circumnuclear star-formation and AGN activity: Clues from surface brightness radial profile of PAHs and [SIV]
• The Star Formation Reference Survey III: A Multi-wavelength View of Star Formation in Nearby Galaxies
• The Ionization and Destruction of Polycyclic Aromatic Hydrocarbons in Powerful Quasars
• NNLC: Non-Negative Least Chi-square minimization and application to HPGe detectors
• A New Technique for Measuring Polycyclic Aromatic Hydrocarbon Emission in Different Environments
• The Star Formation Reference Survey-V: the effect of extinction, stellar mass, metallicity, and nuclear activity on star-formation rates based on H$\alpha$ emission
• SSGSS: The Spitzer-SDSS-GALEX Spectroscopic Survey
• The Star Formation Reference Survey. II. Activity demographics and host-galaxy properties for Infrared-selected galaxies
• Modeling IR Spectral Energy Distributions: A Pilot Study of Starburst Parameters and Silicate Absorption Curves for Some GOALS Galaxies
• Polycyclic aromatic hydrocarbons and the ionized gas

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