X-rays from Green Pea Analogs

Abstract

X-ray observations of two metal-deficient luminous compact galaxies (LCG) (SHOC~486 and SDSS J084220.94+115000.2) with properties similar to the so-called Green Pea galaxies were obtained using the {\emph{Chandra X-ray Observatory}}. Green Pea galaxies are relatively small, compact (a few kpc across) galaxies that get their green color from strong [OIII]$\lambda$5007Å emission, an indicator of intense, recent star formation. These two galaxies were predicted to have the highest observed count rates, using the X-ray luminosity -- star formation rate ($L_X$--SFR) relation for X-ray binaries, from a statistically complete sample drawn from optical criteria. We determine the X-ray luminosity relative to star-formation rate and metallicity for these two galaxies. Neither exhibit any evidence of active galactic nuclei and we suspect the X-ray emission originates from unresolved populations of high mass X-ray binaries. We discuss the $L_X$--SFR--metallicity plane for star-forming galaxies and show that the two LCGs are consistent with the prediction of this relation. This is the first detection of Green Pea analogs in X-rays.

7 pages, 5 figures

References in corpus (32)

• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The Seventh Data Release of the Sloan Digital Sky Survey
• [O III]/[N II] as an Abundance Indicator at High Redshift
• The 'Forbidden' Abundance of Oxygen in the Sun
• Estimating Star Formation Rates from Infrared and Radio Luminosities: The Origin of the Radio-Infrared Correlation
• Line formation in solar granulation: IV. [O I], OI and OH lines and the photospheric O abundance
• The chemical composition of metal-poor emission-line galaxies in the Data Release 3 of the Sloan Digital Sky Survey
• X-ray emission from star-forming galaxies - I. High-mass X-ray binaries
• Galaxy Zoo Green Peas: Discovery of A Class of Compact Extremely Star-Forming Galaxies
• The most metal-poor galaxies
• Strongly star forming galaxies in the local Universe with nebular He II 4686 emission
• Green Pea Galaxies and cohorts: Luminous Compact Emission-Line Galaxies in the Sloan Digital Sky Survey
• Galaxies with Wolf-Rayet signatures in the low-redshift Universe - A survey using the Sloan Digital Sky Survey
• Stellar black holes at the dawn of the universe
• The 4 Ms Chandra Deep Field-South Number Counts Apportioned by Source Class: Pervasive Active Galactic Nuclei and the Ascent of Normal Galaxies
• Energy Feedback from X-ray Binaries in the Early Universe
• Signatures of X-rays in the early Universe
• High-Ionization Emission in Metal-Deficient Blue Compact Dwarf Galaxies
• On the oxygen and nitrogen chemical abundances and the evolution of the "green pea" galaxies
• Star formation in the nearby universe: the ultraviolet and infrared points of view
• Star formation rate in galaxies from UV, IR, and H-alpha estimators
• Ultra-Luminous X-Ray Sources in the Most Metal Poor Galaxies
• Constraints on X-ray Emissions from the Reionization Era
• Enhanced X-ray emission from Lyman Break Analogues and a Possible $L_{\mathrm{X}}$--SFR--Metallicity Plane
• The X-ray Star Formation Story as Told by Lyman Break Galaxies in the 4 Ms CDF-S
• Evidence for Elevated X-ray Emission in Local Lyman Break Galaxy Analogs
• Dynamics of stellar black holes in young star clusters with different metallicities - I. Implications for X-ray binaries
• X-ray binary formation in low-metallicity blue compact dwarf galaxies
• Metallicity dependence of HMXB populations
• X-rays from Blue Compact Dwarf Galaxies
• UV and FIR selected samples of galaxies in the local Universe. Dust extinction and star formation rates
• Planck intermediate results. XXIII. Galactic plane emission components derived from Planck with ancillary data

Cited by in corpus (9)

• High-mass X-ray binaries in nearby metal-poor galaxies: on the contribution to nebular HeII emission
• Can nebular HeII emission be explained by ultra-luminous X-ray sources?
• Elevated Hot Gas and High-Mass X-ray Binary Emission in Low Metallicity Galaxies: Implications for Nebular Ionization and Intergalactic Medium Heating in the Early Universe
• Green Peas in X-rays
• Space Debris -- Optical Measurements
• Starburst galaxies
• Resolving the X-ray emission from the Lyman continuum emitting galaxy Tol 1247-232
• A NuSTAR and XMM-Newton Study of the Two Most Actively Star-forming Green Pea Galaxies (SDSS J0749+3337 and SDSS J0822+2241)
• Spatially-resolved properties of the ionized gas in the HII galaxy J084220+115000