Euclid preparation. Optical emission-line predictions of intermediate-z galaxy populations in GAEA for the Euclid Deep and Wide Surveys

Abstract

In anticipation of the Euclid Wide and Deep Surveys, we present optical emission-line predictions at intermediate redshifts from 0.4 to 2.5. Our approach combines a mock light cone from the GAEA semi-analytic model to self-consistently model nebular emission from HII regions, narrow-line regions of active galactic nuclei (AGN), and evolved stellar populations. Our analysis focuses on seven optical emission lines: H$\alpha$, H$\beta$, [SII]$\lambda \lambda 6717,6731$, [NII]$\lambda 6584$, [OI]$\lambda 6300$, [OIII]$\lambda 5007$, and [OII]$\lambda \lambda 3727,3729$. We find that Euclid will predominantly observe massive, star-forming, and metal-rich line-emitters. Interstellar dust, modelled using a Calzetti law with mass-dependent scaling, may decrease observable percentages by a further 20-30% with respect to our underlying emission-line populations from GAEA. We predict Euclid to observe around 30-70% of H$\alpha$-, [NII]-, [SII]-, and [OIII]-emitting galaxies at redshift below 1 and under 10% at higher redshift. Observability of H$\beta$-, [OII]-, and [OI]- emission is limited to below 5%. For the Euclid-observable sample, we find that BPT diagrams can effectively distinguish between different galaxy types up to around redshift 1.8, attributed to the bias toward metal-rich systems. Moreover, we show that the relationships of H$\alpha$ and [OIII]+H$\beta$ to the star-formation rate, and the [OIII]-AGN luminosity relation, exhibit minimal changes with increasing redshift. Based on line ratios [NII]/H$\alpha$, [NII]/[OII], and [NII]/[SII], we further propose novel z-invariant tracers for the black hole accretion rate-to-star formation rate ratio. Lastly, we find that commonly used metallicity estimators display gradual shifts in normalisations with increasing redshift, while maintaining the overall shape of local calibrations. This is in tentative agreement with recent JWST data.

32 pages, 15 figures, submitted to A&A

References in corpus (53)

• Cosmic Star Formation History
• The Host Galaxies and Classification of Active Galactic Nuclei
• The hierarchical formation of the brightest cluster galaxies
• Strong Nebular Line Ratios in the Spectra of z~2-3 Star-forming Galaxies: First Results from KBSS-MOSFIRE
• Understanding Galaxy Evolution through Emission Lines
• The Mass-Metallicity and the Fundamental Metallicity Relation revisited on a fully Te-based abundance scale for galaxies
• Absorption Properties and Evolution of Active Galactic Nuclei
• On the X-ray, optical emission line and black hole mass properties of local Seyfert galaxies
• Modelling the nebular emission from primeval to present-day star-forming galaxies
• The chemical enrichment in the early Universe as probed by JWST via direct metallicity measurements at z~8
• Emission-line Diagnostics of Low Metallicity AGN
• Nebular Emission Line Ratios in z~2-3 Star-Forming Galaxies with KBSS-MOSFIRE: Exploring the Impact of Ionization, Excitation, and Nitrogen-to-Oxygen Ratio
• The MOSDEF Survey: Excitation Properties of $z\sim 2.3$ Star-forming Galaxies
• Deriving model-based T${}_e$-consistent chemical abundances in ionised gaseous nebulae
• The Luminosity Function and Star Formation Rate between Redshifts of 0.07 and 1.47 for Narrow-band Emitters in the Subaru Deep Field
• AGN Emission Line Diagnostics and the Mass-Metallicity Relation up to Redshift z~2: the Impact of Selection Effects and Evolution
• Metallicities and Physical Conditions in Star-forming Galaxies at z~1.0-1.5
• HiZELS: a high redshift survey of H-alpha emitters. I: the cosmic star-formation rate and clustering at z=2.23
• The Low-Redshift Lyman Continuum Survey I: New, Diverse Local Lyman-Continuum Emitters
• Rest-Frame Optical Spectra of Three Strongly Lensed Galaxies at z~2
• Q1549-C25: A Clean Source of Lyman-Continuum Emission at $z=3.15$
• The Low-Redshift Lyman Continuum Survey II: New Insights into LyC Diagnostics
• The MOSDEF Survey: Optical AGN Diagnostics at z~2.3
• Lyman continuum leakage from low-mass galaxies with Mstar < 1.E8 Msun
• The oxygen abundance in the inner HII regions of M101. Implications for the calibration of strong-line metallicity indicators
• The GREATS H$\beta$+[OIII] Luminosity Function and Galaxy Properties at $\mathbf{z}\sim 8$: Walking the Way of JWST
• Euclid. III. The NISP Instrument
• Evolution of the H$\beta$+[OIII] and [OII] luminosity functions and the [OII] star-formation history of the Universe up to $z$ ~ 5 from HiZELS
• The Correlation of Narrow Line Emission and X-ray Luminosity in Active Galactic Nuclei
• Synthetic nebular emission from massive galaxies I: origin of the cosmic evolution of optical emission-line ratios
• The Halpha-based Star Formation Rate Density of the Universe at z=0.84
• Elemental Abundances in Milky Way-like Galaxies from a Hierarchical Galaxy Formation Model
• JADES: Detecting [OIII]$\lambda 4363$ Emitters and Testing Strong Line Calibrations in the High-$z$ Universe with Ultra-deep JWST/NIRSpec Spectroscopy up to $z\sim 9.5$
• Euclid preparation. XVIII. The NISP photometric system
• The H$\alpha$ Luminosity Function and Star Formation Rate at $z\approx 0.24$ in the Cosmos 2 Square-Degree Field
• CEERS Key Paper III: The Resolved Host Properties of AGN at 3 < z < 5 with JWST
• Chemical abundances of Seyfert 2 AGNs $-$II. N2 metallicity calibration based on SDSS
• Extreme Emission-Line Galaxies in SDSS. I. Empirical and model-based calibrations of chemical abundances
• HI-selected Galaxies in Hierarchical Models of Galaxy Formation and Evolution
• A novel approach to correcting $T_e$-based mass-metallicity relations
• Inferring gas-phase metallicity gradients of galaxies at the seeing limit: A forward modelling approach
• Optical and mid-infrared line emission in nearby Seyfert galaxies
• The BPT Diagram in Cosmological Galaxy Formation Simulations: Understanding the Physics Driving Offsets at High-Redshift
• The Light Curve Shapes as a Key to Resolving the Origin of Long Secondary Periods in Red Giant Stars
• [OIII] emission line as a tracer of star-forming galaxies at high redshifts: Comparison between H$\alpha$ and [OIII] emitters at $z$=2.23 in HiZELS
• Chemical abundances of Seyfert 2 AGNs IV. Composite models calculated by photoionization + shocks
• HST Grism-derived Forecasts for Future Galaxy Redshift Surveys
• On the use of Sulphur as a tracer for abundances in galaxies
• Observational Evidence for Enhanced Black Hole Accretion in Giant Elliptical Galaxies
• Euclid preparation. XXX. Performance assessment of the NISP Red-Grism through spectroscopic simulations for the Wide and Deep surveys
• Unravelling the Dust Attenuation Scaling Relations and their Evolution
• Modelling emission lines in star forming galaxies
• On the significance of the excess number of strong MgII absorbers observed towards Gamma-ray bursts

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