Characteristics of mid-infrared PAH emission from star-forming galaxies selected at 250 μm in the North Ecliptic Pole (NEP) field

Abstract

Evolutionary properties of infrared (IR) luminous galaxies are important keys to understand dust-obscured star formation history and galaxy evolution. Based on the near- to mid-IR imaging with 9 continuous filters of AKARI space telescope, we present the characteristics of dusty star-forming (SF) galalxies showing polycyclic aromatic hydrocarbon (PAH) features observed by the North Ecliptic Pole (NEP) wide field survey of AKARI and Herschel. All the sample galaxies from the AKARI/NEP-Wide data are selected based both on the Herschel/SPIRE 250 μm detection and optical spectroscopic redshift data. The physical modelling of spectral energy distribution (SED) using all available data points from u to sub-mm 500 μm band, including WISE and PACS data where available, takes unique advantages of the continuous near to mid-IR coverage, reliable constraint on far-IR peak, spectroscopically determined accurate redshifts, as well as energy balance principle by MAGPHYS. This enables us to derive physically meaningful and accurate total infrared luminosity and 8 μm (or PAH) luminosity consistently. Our sample galaxies are in the redshift range z <1, and majority of them appear to be normal SF/spiral populations showing PAH features near the 8 μm. These SF galaxies showing PAHs in the mid-IR include various types from quiescent to starbursts. Some of our sample show shortage of 8 μm luminosity compared to the total IR luminosity and this PAH deficit gets severe in more luminous IR galaxies, suggesting PAH molecules in these galaxies destroyed by strong radiation field from SF region or a large amount of cold dust in ISM. The specific SFR of our sample shows mass dependent time evolution which is consistent with downsizing evolutionary pattern.

arXiv comment8 pages, 7 figures, Accepted to AKARI special issue of the PASJ

References in corpus (42)

• Stellar population synthesis at the resolution of 2003
• Galactic Stellar and Substellar Initial Mass Function
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Star Formation in Galaxies Along the Hubble Sequence
• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
• The Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory
• The Herschel-SPIRE instrument and its in-flight performance
• The Host Galaxies and Classification of Active Galactic Nuclei
• A Simple Model for the Absorption of Starlight by Dust in Galaxies
• New Insight on Galaxy Formation and Evolution from Keck Spectroscopy of the Hawaii Deep Fields
• Infrared Emission from Interstellar Dust. II. The Diffuse Interstellar Medium
• A simple model to interpret the ultraviolet, optical and infrared emission from galaxies
• GOODS-Herschel: an infrared main sequence for star-forming galaxies
• The Mid-Infrared Spectrum of Star-Forming Galaxies: Global Properties of PAH Emission
• Constraining the Low-Mass Slope of the Star Formation Sequence at 0.5<z<2.5
• The Infrared Astronomical Mission AKARI
• The Mass Assembly History of Field Galaxies: Detection of an Evolving Mass Limit for Star Forming Galaxies
• The Evolving Interstellar Medium of Star Forming Galaxies Since z=2 as Probed by Their Infrared Spectral Energy Distributions
• The Evolution of the Stellar Mass Function of Galaxies from z=4.0 and the First Comprehensive Analysis of its Uncertainties: Evidence for Mass-dependent Evolution
• The Infrared Camera (IRC) for AKARI - Design and Imaging Performance
• The Many Manifestations of Downsizing: Hierarchical Galaxy Formation Models confront Observations
• Cosmic Star Formation History and its Dependence on Galaxy Stellar Mass
• The SCUBA-2 Cosmology Legacy Survey: 850um maps, catalogues and number counts
• GOODS-Herschel Measurements of the Dust Attenuation of Typical Star-Forming Galaxies at High Redshift: Observations of UV-Selected Galaxies at z~2
• Dust temperature and mid-to-total infrared color distributions for star-forming galaxies at 0<z<4
• Deep Extragalactic Surveys around the Ecliptic Poles with AKARI (ASTRO-F)
• Herschel-ATLAS: Dust temperature and redshift distribution of SPIRE and PACS detected sources using submillimetre colours
• Evolution of Infrared Luminosity functions of Galaxies in the AKARI NEP-Deep field: Revealing the cosmic star formation history hidden by dust
• Observational evidence of a slow downfall of star formation efficiency in massive galaxies during the last 10 Gyr
• An Optical Source Catalog of the North Ecliptic Pole Region
• The AKARI NEP-Deep survey: a mid-infrared source catalogue
• The North Ecliptic Pole Wide survey of AKARI: a near- and mid-infrared source catalog
• Polycyclic aromatic hydrocarbon (PAH) luminous galaxies at z~1
• Chandra survey in the AKARI North Ecliptic Pole Deep Field. I. X-ray data, point-like source catalog, sensitivity maps, and number counts
• Optical Images and Source Catalog of AKARI North Ecliptic Pole Wide Survey Field
• North Ecliptic Pole Wide Field Survey of AKARI: Survey Strategy and Data Characteristics
• Polycyclic aromatic hydrocarbon feature deficit of starburst galaxies in the AKARI North Ecliptic Pole Deep Field
• The Herschel-PACS North Ecliptic Pole Survey
• J and H-band Imaging of AKARI North Ecliptic Pole Survey Field
• A deep radio survey of the AKARI North Ecliptic Pole Field - WSRT 20 cm Radio survey description, observations and data reduction
• Evolution of mid-infrared galaxy luminosity functions from the entire AKARI NEP-Deep field with new CFHT photometry
• Mid-Infrared Luminosity Function of Local Star-Forming Galaxies in the NEP-Wide Survey Field of AKARI

Cited by in corpus (6)

• Infrared luminosity functions based on 18 mid-infrared bands: revealing cosmic star formation history with AKARI and Hyper Suprime-Cam
• Identification of AKARI infrared sources by Deep HSC Optical Survey: Construction of New Band-Merged Catalogue in the NEP-Wide field
• Extinction-free Census of AGNs in the $AKARI$/IRC North Ecliptic Pole Field from 23-band Infrared Photometry from Space Telescopes
• Spectral energy distributions of dust and PAHs based on the evolution of grain size distribution in galaxies
• Environmental Effects on AGN activity via Extinction-free Mid-Infrared Census
• Optically-detected galaxy cluster candidates in the $AKARI$ North Ecliptic Pole field based on photometric redshift from Subaru Hyper Suprime-Cam