The eROSITA Final Equatorial-Depth Survey (eFEDS): Presenting The Demographics of X-ray Emission From Normal Galaxies

Abstract

The $eROSITA$ Final Equatorial Depth Survey (eFEDS), completed during the calibration and performance verification phase of the $eROSITA$ instrument on $SpectrumRoentgenGamma$, delivers data at and beyond the final depth of the four-year $eROSITA$ all-sky survey (eRASS:8), $f_{0.5-2\text{ keV}}$ = $1.1\times 10^{-14}$ erg s${}^{-1}$ cm${}^2$, over 140 deg${}^2$. It provides the first view of normal galaxy X-ray emission from X-ray binaries (XRBs) and the hot interstellar medium at the full depth of eRASS:8. We use the Heraklion Extragalactic Catalogue (HECATE) of galaxies to correlate with eFEDS X-ray sources and identify 94 X-ray detected normal galaxies. We classify galaxies as star-forming, early-type, composite, and AGN using SDSS and 6dF optical spectroscopy. The eFEDS field harbours 37 normal galaxies: 36 late-type (star-forming) galaxies and 1 early-type galaxy. There are 1.9 times as many normal galaxies as predicted by scaling relations via SIXTE simulations, with an overabundance of late-type galaxies and a dearth of early-type galaxies. Dwarf galaxies with high specific star formation rate (SFR) have elevated L${}_{\text{X}}$/SFR when compared with specific SFR and metallicity, indicating an increase in XRB emission due to low-metallicity. We expect that eRASS:8 will detect 12,500 normal galaxies, the majority of which will be star-forming, with the caveat that there are unclassified sources in eFEDS and galaxy catalogue incompleteness issues that could increase the actual number of detected galaxies over these current estimates. eFEDS observations detected a rare population of galaxies -- the metal-poor dwarf starbursts -- that do not follow known scaling relations. eRASS is expected to discover significant numbers of these high-redshift analogues, which are important for studying the heating of the intergalactic medium at high-redshift.

arXiv comment17 pages, 10 figures, 3 tables. Submitted to A&A for the Special Issue: The Early Data Release of eROSITA and Mikhail Pavlinsky ART-XC on the SRG Mission

References in corpus (70)

• On the variation of the Initial Mass Function
• The Host Galaxies of AGN
• 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
• [O III]/[N II] as an Abundance Indicator at High Redshift
• Metallicity Calibrations and the Mass-Metallicity Relation for Star-Forming Galaxies
• The 6dF Galaxy Survey: Final Redshift Release (DR3) and Southern Large-Scale Structures
• HyperLEDA. III. The catalogue of extragalactic distances
• Binary Black Hole Population Properties Inferred from the First and Second Observing Runs of Advanced LIGO and Advanced Virgo
• The eROSITA X-ray telescope on SRG
• X-ray emission from star-forming galaxies - I. High-mass X-ray binaries
• The 6dF Galaxy Survey: Samples, Observational Techniques and the First Data Release
• The Chandra Deep Field-South Survey: 7 Ms Source Catalogs
• The XMM-Newton serendipitous survey IX. The fourth XMM-Newton serendipitous source catalogue
• Low mass X-ray binaries as a stellar mass indicator for the host galaxy
• The eROSITA Final Equatorial Depth Survey (eFEDS): The X-ray catalog
• Radiation Backgrounds at Cosmic Dawn: X-Rays from Compact Binaries
• A Chandra Perspective On Galaxy-Wide X-ray Binary Emission And Its Correlation With Star Formation Rate And Stellar Mass: New Results From Luminous Infrared Galaxies
• The XMM-Newton wide-field survey in the COSMOS field. The point-like X-ray source catalogue
• Observational evidence for intermediate-mass black holes
• X-ray Binary Evolution Across Cosmic Time
• The Evolution of Normal Galaxy X-ray Emission Through Cosmic History: Constraints from the 6 Ms Chandra Deep Field-South
• A New Sample of (Wandering) Massive Black Holes in Dwarf Galaxies from High Resolution Radio Observations
• Semi-empirical analysis of Sloan Digital Sky Survey galaxies: II. The bimodality of the galaxy population revisited
• X-ray emission from star-forming galaxies - II. Hot interstellar medium
• Old and Young X-ray Point Source Populations in Nearby Galaxies
• Revisiting with Chandra the Scaling Relations of the X-ray Emission Components (Binaries, Nuclei and Hot Gas) of Early Type Galaxies
• A ~50,000 solar mass black hole in the nucleus of RGG 118
• Finding counterparts for All-sky X-ray surveys with Nway: a Bayesian algorithm for cross-matching multiple catalogues
• The Effect of Starburst Metallicity on Bright X-Ray Binary Formation Pathways
• Ultra-luminous X-ray sources and remnants of massive metal-poor stars
• The X-ray spectra of the first galaxies: 21cm signatures
• X-ray emission from star-forming galaxies - III. Calibration of the Lx-SFR relation up to redshift z$\simeq$1.3
• C-GOALS: Chandra observations of a complete sample of luminous infrared galaxies from the IRAS Revised Bright Galaxy Survey
• The Chandra COSMOS-Legacy survey: Source X-ray spectral properties
• The eROSITA Final Equatorial-Depth Survey (eFEDS): Identification and characterization of the counterparts to the point-like sources
• Ultra-Luminous X-Ray Sources in the Most Metal Poor Galaxies
• Enhanced X-ray emission from Lyman Break Analogues and a Possible $L_{\mathrm{X}}$--SFR--Metallicity Plane
• SIXTE -- The Generic X-ray Instrument Simulation Toolkit
• 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
• Reionization and Beyond: detecting the peaks of the cosmological 21cm signal
• A census of ultraluminous X-ray sources in the local Universe
• The Metallicity Dependence of the High-Mass X-ray Binary Luminosity Function
• X-ray binary formation in low-metallicity blue compact dwarf galaxies
• Metallicity dependence of HMXB populations
• X-ray Scaling Relation in Early-Type Galaxies: Dark Matter as a Primary Factor in Retaining Hot Gas
• Detection of a luminous hot X-ray corona around the massive spiral galaxy NGC266
• Catalogues of Active Galactic Nuclei From Gaia and unWISE Data
• The Circum-Galactic Medium of MASsive Spirals II: Probing the Nature of Hot Gaseous Halo around the Most Massive Isolated Spiral Galaxies
• Low-Mass X-ray Binaries and Globular Clusters in Early-Type Galaxies. I. Chandra Observations
• X-ray Scaling Relations of core and coreless E and S0 Galaxies
• Crossing the Line: Active Galactic Nuclei in the Star-forming region of the BPT Diagram
• Another thread in the tapestry of stellar feedback: X-ray binaries
• NuSTAR, XMM-Newton and Suzaku Observations of the Ultraluminous X-ray Source Holmberg II X-1
• The Heraklion Extragalactic Catalogue (HECATE): a value-added galaxy catalogue for multi-messenger astrophysics
• X-ray Outflows and Super-Eddington Accretion in the Ultraluminous X-ray Source Holmberg IX X-1
• SDSS-IV eBOSS Spectroscopy of X-ray and WISE AGN in Stripe 82X: Overview of the Demographics of X-ray and Mid-Infrared Selected Active Galactic Nuclei
• Exploring the Overabundance of ULXs in Metal- and Dust-poor Local Lyman Break Analogs
• The X-ray Luminosity Functions of Field Low Mass X-ray Binaries in Early-Type Galaxies: Evidence for a Stellar Age Dependence
• The MOSDEF Survey: The Metallicity Dependence of X-ray Binary Populations at $z\sim 2$
• XMMPZCAT: A catalogue of photometric redshifts for X-ray sources
• The Chandra Deep Wide-Field Survey: A New Chandra Legacy Survey in the Boötes Field I. X-ray Point Source Catalog, Number Counts and Multi-Wavelength Counterparts
• Evidence for Black Hole Growth in Local Analogs to Lyman Break Galaxies
• On the Spatially Resolved Star-Formation History in M51 II: X-ray Binary Population Evolution
• Establishing the X-ray Source Detection Strategy for eROSITA with Simulations
• Sub-galactic scaling relations between X-ray luminosity, star-formation rate, and stellar mass
• Multidimensional Data Driven Classification of Emission-line Galaxies
• Black Holes and Neutron Stars in Nearby Galaxies: Insights from NuSTAR
• The Next Generation X-ray Galaxy Survey with eROSITA

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• Decomposition of galactic X-ray emission with Phox: Contributions from hot gas and XRBs
• The hot circumgalactic medium in the eROSITA All-Sky Survey III. Star-forming and quiescent galaxies
• X-ray luminosity-star formation rate scaling relation: Constraints from the eROSITA Final Equatorial Depth Survey (eFEDS)
• The first all-sky survey of star-forming galaxies with eROSITA: Scaling relations and a population of X-ray luminous starbursts
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• The hot gas mass fraction in halos. From Milky Way-like groups to massive clusters
• Average X-ray properties of galaxy groups. From Milky Way-like halos to massive clusters
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• Gas excitation in galaxies and active galactic nuclei with He IIλ4686 and X-ray emission