The ionizing photon production efficiency of bright z$\sim$2-5 galaxies

Abstract

We investigate the production efficiency of ionizing photons (${\xi }_{ion}^{\ast }$) of 1174 galaxies with secure redshift at z=2-5 from the VANDELS survey to determine the relation between ionizing emission and physical properties of bright and massive sources. We constrain ${\xi }_{ion}^{\ast }$ and galaxy physical parameters by means of spectro-photometric fits performed with the BEAGLE code. The analysis exploits the multi-band photometry in the VANDELS fields, and the measurement of UV rest-frame emission lines (CIII]$\lambda 1909$, HeII$\lambda 1640$, OIII]$\lambda 1666$) from deep VIMOS spectra. We find no clear evolution of ${\xi }_{ion}^{\ast }$ with redshift within the probed range. The ionizing efficiency slightly increases at fainter $M_{UV}$, and bluer UV slopes, but these trends are less evident when restricting the analysis to a complete subsample at log(M${}_{star}$/M${}_{\odot }$)$>$9.5. We find a significant trend of increasing ${\xi }_{ion}^{\ast }$ with increasing EW(Ly$\alpha$), with an average log(${\xi }_{ion}^{\ast }$/Hz erg${}^{-1}$)$>$25 at EW$>$50Å, and a higher ionizing efficiency for high-EW CIII]$\lambda 1909$ and OIII]$\lambda 1666$ emitters. The most significant correlations are found with respect to stellar mass, specific star-formation rate (sSFR) and SFR surface density (${\Sigma }_{SFR}$). The relation between ${\xi }_{ion}^{\ast }$ and sSFR shows a monotonic increase from log(${\xi }_{ion}^{\ast }$/Hz erg${}^{-1}$) $\sim$24.5 at log(sSFR)$\sim$-9.5$y{r}^{-1}$ to $\sim$25.5 at log(sSFR)$\sim$-7.5$y{r}^{-1}$, a low scatter and little dependence on mass. The objects above the main-sequence of star-formation consistently have higher-than-average ${\xi }_{ion}^{\ast }$. A clear increase of ${\xi }_{ion}^{\ast }$ with ${\Sigma }_{SFR}$ is also found, with log(${\xi }_{ion}^{\ast }$/Hz erg${}^{-1}$)$>$25 for objects at ${\Sigma }_{SFR}>$10 M${}_{\odot }/yr/kp{c}^2$.(Abridged)

arXiv comment11 pages, 9 figures, accepted for publication in A&A

References in corpus (95)

• Stellar population synthesis at the resolution of 2003
• Galactic Stellar and Substellar Initial Mass Function
• Star Formation in Galaxies Along the Hubble Sequence
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• Star Formation in the Milky Way and Nearby Galaxies
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey - The Hubble Space Telescope Observations, Imaging Data Products and Mosaics
• A Simple Model for the Absorption of Starlight by Dust in Galaxies
• Multimodal nested sampling: an efficient and robust alternative to MCMC methods for astronomical data analysis
• A Highly Consistent Framework for the Evolution of the Star-Forming "Main Sequence" from z~0-6
• A fundamental relation between mass, SFR and metallicity in local and high redshift galaxies
• The Herschel view of the dominant mode of galaxy growth from z=4 to the present day
• New Constraints on Cosmic Reionization from the 2012 Hubble Ultra Deep Field Campaign
• The Chandra Deep Field-South Survey: 7 Ms Source Catalogs
• A Comprehensive Study on Galaxies at z~9-16 Found in the Early JWST Data: UV Luminosity Functions and Cosmic Star-Formation History at the Pre-Reionization Epoch
• CANDELS Multi-wavelength Catalogs: Source Detection and Photometry in the GOODS-South Field
• Keck Spectroscopy of 3<z<7 Faint Lyman Break Galaxies: The Importance of Nebular Emission in Understanding the Specific Star Formation Rate and Stellar Mass Density
• Two Remarkably Luminous Galaxy Candidates at $z\approx 10-12$ Revealed by JWST
• New Determinations of the UV Luminosity Functions from z~9 to z~2 show a remarkable consistency with halo growth and a constant star formation efficiency
• Modelling and interpreting spectral energy distributions of galaxies with BEAGLE
• Stellar Population Effects on the Inferred Photon Density at Reionization
• Lyman-alpha and CIII] Emission in z=7-9 Galaxies: Accelerated Reionization Around Luminous Star Forming Systems?
• Early results from GLASS-JWST. III: Galaxy candidates at z$\sim$9-15
• Modelling the nebular emission from primeval to present-day star-forming galaxies
• Nuclear activity versus star formation: emission-line diagnostics at ultraviolet and optical wavelengths
• Low-redshift Lyman continuum leaking galaxies with high [OIII]/[OII] ratios
• CANDELS Multiwavelength catalogs: Source Identification and Photometry in the CANDELS UKIDSS Ultra-Deep Survey Field
• The Keck Lyman Continuum Spectroscopic Survey (KLCS): The Emergent Ionizing Spectrum of Galaxies at $z\sim 3$
• Stellar masses from the CANDELS survey: the GOODS-South and UDS fields
• Dust extinction from Balmer decrements of star-forming galaxies at 0.75<z<1.5 with HST/WFC3 spectroscopy from the WISP survey
• How to measure galaxy star-formation histories I: Parametric models
• Spectroscopic detection of CIV in a galaxy at z=7.045: Implications for the ionizing spectra of reionization-era galaxies
• J1154+2443: a low-redshift compact star-forming galaxy with a 46 per cent leakage of Lyman continuum photons
• Near infrared spectroscopy and star-formation histories of 3<z<4 quiescent galaxies
• Galaxy Formation and Reionization: Key Unknowns and Expected Breakthroughs by the James Webb Space Telescope
• Ultraviolet Emission Lines in Young Low Mass Galaxies at z~2: Physical Properties and Implications for Studies at z>7
• The Lyman-Continuum Photon Production Efficiency xi_{ion} of z~4-5 Galaxies from IRAC-based Halpha Measurements: Implications for the Escape Fraction and Cosmic Reionization
• A JWST/NIRCam Study of Key Contributors to Reionization: The Star-forming and Ionizing Properties of UV-faint $z\sim 7-8$ Galaxies
• Spectroscopic detections of CIII]1909 at z~6-7: A new probe of early star forming galaxies and cosmic reionisation
• The VLT LEGA-C Spectroscopic Survey: The Physics of Galaxies at a Lookback Time of 7 Gyr
• Hubble imaging of the ionizing radiation from a star-forming galaxy at z=3.2 with fesc>50%
• The Low-Redshift Lyman Continuum Survey I: New, Diverse Local Lyman-Continuum Emitters
• First look with JWST spectroscopy: $z\sim 8$ galaxies resemble local analogues
• MMT/MMIRS spectroscopy of $z=1.3-2.4$ extreme [OIII] emitters: Implications for galaxies in the reionization-era
• CEERS Spectroscopic Confirmation of NIRCam-Selected z > 8 Galaxy Candidates with JWST/NIRSpec: Initial Characterization of their Properties
• The Far-Ultraviolet Continuum Slope as a Lyman Continuum Escape Estimator at High-redshift
• The [OIII]$+$H$\beta$ Equivalent Width Distribution at z$\simeq$7: Implications for the Contribution of Galaxies to Reionization
• Reliable random error estimation in the measurement of line-strength indices
• Insights into the content and spatial distribution of dust from the integrated spectral properties of galaxies
• Binary Stars Can Provide the "Missing Photons" Needed for Reionization
• The VIMOS Ultra Deep Survey: Nature, ISM properties, and ionizing spectra of CIII]1909 emitters at z=2-4
• Constraining the metallicities, ages, star formation histories, and ionizing continua of extragalactic massive star populations
• The MOSDEF Survey: Direct Observational Constraints on the Ionizing Photon Production Efficiency, ${\xi }_{\mathrm{ion}}$, at z~2
• The MOSDEF Survey: Significant Evolution in the Rest-Frame Optical Emission Line Equivalent Widths of Star-Forming Galaxies at z=1.4-3.8
• The VANDELS ESO public spectroscopic survey: observations and first data release
• On the SFR-M${}_{\ast }$ main sequence archetypal star-formation history and analytical models
• The production and escape of Lyman-Continuum radiation from star-forming galaxies at z~2 and their redshift evolution
• SILVERRUSH. V. Census of Lya, [OIII]5007, Ha, and [CII]158um Line Emission with ~1000 LAEs at z=4.9-7.0 Revealed with Subaru/HSC
• EZ: A Tool for Automatic Redshift Measurement
• Early Results from GLASS-JWST. XIX: A High Density of Bright Galaxies at $z\approx 10$ in the Abell 2744 Region
• The Hawk-I UDS and GOODS Survey (HUGS): Survey design and deep K-band number counts
• The origin of the escape of Lyman alpha and ionizing photons in Lyman Continuum Emitters
• An Ultraviolet Spectroscopic Atlas of Local Starbursts and Star-Forming Galaxies: The Legacy of FOS and GHRS
• An uncontaminated measurement of the escaping Lyman continuum at $z\sim 3$
• A Hard Ionizing Spectrum in z=3-4 Ly-alpha Emitters with Intense [OIII] Emission: Analogs of Galaxies in the Reionization Era?
• The Lyman Continuum escape fraction of galaxies at z=3.3 in the VUDS-LBC/COSMOS field
• The Recent Burstiness of Star Formation in Galaxies at z~4.5 from H$\alpha$ Measurements
• Physical properties and H-ionizing-photon production rates of extreme nearby star-forming regions
• The ALMA REBELS Survey: Specific Star-Formation Rates in the Reionization Era
• The VANDELS ESO public spectroscopic survey: final Data Release of 2087 spectra and spectroscopic measurements
• MMT Spectroscopy of Lyman-alpha at z$\simeq$7: Evidence for Accelerated Reionization Around Massive Galaxies
• X-UDS: The Chandra Legacy Survey of the UKIDSS Ultra Deep Survey Field
• The NIRVANDELS Survey: a robust detection of $\alpha$-enhancement in star-forming galaxies at $z\simeq 3.4$
• Closing in on the sources of cosmic reionization: first results from the GLASS-JWST program
• The ionizing photon production efficiency of compact z~0.3 Lyman continuum leakers and comparison with high redshift galaxies
• The bright end of the z ~ 7 UV Luminosity Function from a wide and deep HAWK-I survey
• The properties of He II 1640 emitters at z ~ 2.5-5 from the VANDELS survey
• Modelling ultraviolet-line diagnostics of stars, the ionized and the neutral interstellar medium in star-forming galaxies
• The mean H$\alpha$ EW and Lyman-continuum photon production efficiency for faint $z\approx 4-5$ galaxies
• The Lyman-continuum photon production efficiency in the high-redshift Universe
• Size evolution of star-forming galaxies with $2<z<4.5$ in the VIMOS Ultra-Deep Survey
• Low-redshift compact star-forming galaxies as analogues of high-redshift star-forming galaxies
• The VANDELS survey: the relation between UV continuum slope and stellar metallicity in star-forming galaxies at z~3
• The production of ionizing photons in UV-faint z~3-7 galaxies
• New constraints on the average escape fraction of Lyman continuum radiation in z~4 galaxies from the VIMOS Ultra Deep Survey (VUDS)
• High Equivalent Width of Hα+[N II] Emission in z~8 Lyman-break Galaxies from IRAC 5.8μm Observations: Evidence for Efficient Lyman-continuum Photon production in the Epoch of Re-ionization
• The VANDELS survey: a measurement of the average Lyman-continuum escape fraction of star-forming galaxies at z=3.5
• Semi-analytic forecasts for JWST -- III. Intrinsic production efficiency of Lyman-continuum radiation
• Toward a Better Understanding of Cosmic Chronometers: Stellar Population Properties of Passive Galaxies at Intermediate Redshift
• The efficiency of ionising photon production and the radiation energy balance in compact star-forming galaxies
• The Ionizing Photon Production Efficiency (${\xi }_{ion}$) Of Lensed Dwarf Galaxies At $z\sim 2$
• Optical Line Emission from z$\sim$6.8 Sources with Deep Constraints on Ly$\alpha$ Visibility
• FirstLight III: Rest-frame UV-optical spectral energy distributions of simulated galaxies at cosmic dawn
• Properties of the interstellar medium in star-forming galaxies at redshifts 2 < z < 5 from the VANDELS survey
• Insights into the reionization epoch from cosmic-noon-CIV emitters in the VANDELS survey

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• Extreme Ionizing Properties of Metal-Poor, Muv ~ -12 Star Complex in the first Gyr
• Little impact of mergers and galaxy morphology on the production and escape of ionizing photons in the early Universe
• The ionizing photon production efficiency of star-forming galaxies at $z\sim 4-10$
• Identifying Lyα emitter candidates with Random Forest: learning from galaxies in CANDELS survey
• Towards unveiling the Cosmic Reionization: the ionizing photon production efficiency (${\xi }_{ion}$) of Low-mass H$\alpha$ emitters at $z\sim 2.3$
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