A Giant Green Pea Identified in the Spectroscopy of Spatially Extended [OIII] Sources

Abstract

We present the results of the deep Subaru/FOCAS and Keck/MOSFIRE spectroscopy for four spatially extended [O III]$\lambda \lambda$4959,5007 sources, dubbed [O III] blobs, at $z=0.6-0.8$ that are originally pinpointed by large-area Subaru imaging surveys. The line diagnostics of the rest-frame optical lines suggests that only one [O III] blob, OIIIB-3, presents an AGN signature, indicating that hot gas of the rest of the [O III] blobs is heated by star formation. One of such star-forming [O III] blobs, OIIIB-4, at $z=0.838$ has an [O III] equivalent width of $845\pm 27$ Å and an [O III] to [O II]$\lambda \lambda$3726,3729 ratio of [O III]/[O II]= $6.5\pm 2.7$ that are as high as those of typical green peas (Cardamone et al. 2009). The spatially resolved spectrum of OIIIB-4 shows [O III]/[O II]= $5-10$ over $14$ kpc in the entire large [O III] extended regions of OIIIB-4, unlike the known green peas whose strong [O III] emission region is compact. Moreover, OIIIB-4 presents no high ionization emission lines, unlike green beans that have extended [O III] emission with a type-2 AGN. OIIIB-4 is thus a giant green pea, which is a low stellar mass ($7\times 10^7$ $M_{\odot }$) galaxy with a very high specific star formation rate (sSFR = $2\times 10^2{\mathrm{Gyr}}^{-1}$), a high ionization parameter ($q_{ion}\sim 3\times 10^8\mathrm{cm}{\mathrm{s}}^{-1}$), and a low metallicity similar to those of green peas. Neither an AGN-light echo nor a fast radiative shock likely takes place due to the line diagnostics for spatially-resolved components of OIIIB-4 and no detections of He II$\lambda$4686 or [Ne V]$\lambda \lambda$3346,3426 lines that are fast-radiative shock signatures. There is a possibility that the spatially-extended [O III] emission of OIIIB-4 is originated from outflowing gas produced by the intense star formation in a density-bounded ionization state.

arXiv comment17 pages, 12 figures, 4 tables, Accepted for publication in ApJ

References in corpus (82)

• Stellar population synthesis at the resolution of 2003
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• The Seventh Data Release of the Sloan Digital Sky Survey
• The Host Galaxies of AGN
• The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS
• Theoretical Modeling of Starburst Galaxies
• The European Photon Imaging Camera on XMM-Newton: The MOS Cameras
• The Optical and Near-Infrared Properties of Galaxies: I. Luminosity and Stellar Mass Functions
• The Host Galaxies and Classification of Active Galactic Nuclei
• Star Formation in AEGIS Field Galaxies since z=1.1 : The Dominance of Gradually Declining Star Formation, and the Main Sequence of Star-Forming Galaxies
• The reversal of the star formation-density relation in the distant universe
• A Semi-Analytic Model for the Co-evolution of Galaxies, Black Holes, and Active Galactic Nuclei
• Using Strong Lines to Estimate Abundances in Extragalactic HII Regions and Starburst Galaxies
• The SINS survey: SINFONI Integral Field Spectroscopy of z ~ 2 Star-forming Galaxies
• A fundamental relation between mass, SFR and metallicity in local and high redshift galaxies
• The Structure and Kinematics of the Circum-Galactic Medium from Far-UV Spectra of z~2-3 Galaxies
• Massive Molecular Outflows and Evidence for AGN Feedback from CO Observations
• What Shapes the Luminosity Function of Galaxies?
• The MAPPINGS III Library of Fast Radiative Shock Models
• Gas-regulation of galaxies: the evolution of the cosmic sSFR, the metallicity-mass-SFR relation and the stellar content of haloes
• The SINS survey of z~2 galaxy kinematics: properties of the giant star forming clumps
• Mapping Large-Scale Gaseous Outflows in Ultraluminous Galaxies with Keck II ESI Spectra: Variations in Outflow Velocity with Galactic Mass
• Absorption-Line Probes of Gas and Dust in Galactic Superwinds
• Ubiquitous outflows in DEEP2 spectra of star-forming galaxies at z=1.4
• Galaxy Zoo Green Peas: Discovery of A Class of Compact Extremely Star-Forming Galaxies
• Outflows in Infrared-Luminous Starbursts at z < 0.5. II. Analysis and Discussion
• Feedback and Recycled Wind Accretion: Assembling the z=0 Galaxy Mass Function
• Evidence for Ubiquitous Collimated Galactic-Scale Outflows along the Star-Forming Sequence at z~0.5
• Ionization State of Inter-Stellar Medium in Galaxies: Evolution, SFR-M_star-Z Dependence, and Ionizing Photon Escape
• Evidence for powerful AGN winds at high redshift: Dynamics of galactic outflows in radio galaxies during the "Quasar Era"
• Demographics and Physical Properties of Gas Out/Inflows at 0.4 < z < 1.4
• The Origin and Optical Depth of Ionizing Radiation in the "Green Pea" Galaxies
• Strongly star forming galaxies in the local Universe with nebular He II 4686 emission
• The SINS/zC-SINF survey of z~2 galaxy kinematics: Outflow properties
• SDSS-IV MaNGA: The Impact of Diffuse Ionized Gas on Emission-line Ratios, Interpretation of Diagnostic Diagrams, and Gas Metallicity Measurements
• Outflows in Infrared-Luminous Starbursts at z < 0.5. I. Sample, NaI D Spectra, and Profile Fitting
• High-Ionization Emission in Metal-Deficient Blue Compact Dwarf Galaxies
• Radio imaging of the Subaru/XMM-Newton Deep Field - I. The 100-microJy catalogue, optical identifications, and the nature of the faint radio source population
• Suppressing star formation in quiescent galaxies with supermassive black hole winds
• On the oxygen and nitrogen chemical abundances and the evolution of the "green pea" galaxies
• Observations of Feedback from Radio-Quiet Quasars: I. Extents and Morphologies of Ionized Gas Nebulae
• The SINS/zC-SINF survey of z~2 galaxy kinematics: Evidence for powerful AGN-driven nuclear outflows in massive star-forming galaxies
• The Optical Depth of H II Regions in the Magellanic Clouds
• The Subaru/XMM-Newton Deep Survey (SXDS): III. X-Ray Data
• Detection of Pristine Gas Two Billion Years after the Big Bang
• Radiation-magnetohydrodynamic simulations of HII regions and their associated PDRs in turbulent molecular clouds
• Galactic Outflows in Absorption and Emission: Near-UV Spectroscopy of Galaxies at 1<z<2
• Quasar-Mode Feedback in Nearby Type 1 Quasars: Ubiquitous Kiloparsec-Scale Outflows and Correlations with Black Hole Properties
• High velocity outflows from young star-forming galaxies in the UKIDSS Ultra-Deep Survey
• The Properties and Prevalence of Galactic Outflows at z = 1 in the Extended Groth Strip
• Simple Models of Metal-Line Absorption and Emission from Cool Gas Outflows
• Blueberry galaxies: the lowest mass young starbursts
• Searching for Evidence of Energetic Feedback in Distant Galaxies: A Galaxy Wide Outflow in a z~2 Ultraluminous Infrared Galaxy
• The matallicities of star-forming galaxies at intermediate redshifts 0.47 < z < 0.92
• First Spectroscopic Evidence for High Ionization State and Low Oxygen Abundance in Lya Emitters
• Radio imaging of the Subaru/XMM-Newton Deep Field - III. Evolution of the radio luminosity function beyond z=1
• The drop in the cosmic star formation rate below redshift 2 is caused by a change in the mode of gas accretion and by AGN feedback
• Spectral classification of emission-line galaxies from the Sloan Digital Sky Survey. I. An improved classification for high redshift galaxies
• Comparison of H II region luminosities with observed stellar ionizing sources in the Large Magellanic Cloud
• Metallicity of the intergalactic medium using pixel statistics: IV. Oxygen
• Shocked Superwinds from the z~2 Clumpy Star-forming Galaxy, ZC406690
• Outflowing Galactic Winds in Post-starburst and AGN Host Galaxies at 0.2<z<0.8
• The detection of [Ne v] emission in five blue compact dwarf galaxies
• Stars were born in significantly denser regions in the early Universe
• Sizes and Kinematics of Extended Narrow-Line Regions in Luminous Obscured AGN Selected by Broadband Images
• LBT observations of compact star-forming galaxies with extremely high [OIII]/[OII] flux ratios: HeI emission-line ratios as diagnostics of Lyman continuum leakage
• The Emission-Line Spectra of Major Mergers: Evidence for Shocked Outflows
• The Stellar Populations of Lyman Break Galaxies at z~5
• A Tentative Detection of an Emission Line at 1.6 μm for the z~12 Candidate UDFj-39546284
• A sample of Seyfert-2 galaxies with ultra-luminous galaxy-wide NLRs -- Quasar light echos?
• On the Lack of Correlation Between [OIII]/[OII] and Lyman-Continuum Escape Fraction
• The 5 - 10 keV AGN luminosity function at 0.01<z<4.0
• Discovering extremely compact and metal-poor, star-forming dwarf galaxies out to z ~ 0.9 in the VIMOS Ultra-Deep Survey
• The simplest model of galaxy formation I: A formation history model of galaxy stellar mass growth
• About AGN ionization echoes, thermal echoes, and ionization deficits in low redshift Lyman-alpha blobs
• Discovery of Dying Active Galactic Nucleus in Arp 187: Experience of Drastic Luminosity Decline within $10^4$ years
• The 2-10 keV unabsorbed luminosity function of AGN from the XMM-Newton LSS, CDFS and COSMOS surveys
• First Systematic Search for Oxygen-Line Blobs at High Redshift: Uncovering AGN Feedback and Star-Formation Quenching
• Systematic Survey for [OII], [OIII], and H$\alpha$ Blobs at $z=0.1-1.5$: The Implication for Evolution of Galactic-Scale Outflow
• Numerical Models for the Diffuse Ionized Gas in Galaxies. II. Three-dimensional radiative transfer in inhomogeneous interstellar structures as a tool for analyzing the diffuse ionized gas
• SDSS IV MaNGA: Discovery of an $H_{\alpha }$ blob associated with a dry galaxy pair -- ejected gas or a `dark' galaxy candidate?
• MOSFIRE and LDSS3 Spectroscopy for an [OII] Blob at z=1.18: Gas Outflow and Energy Source

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