The Mass–Metallicity Relation at z ∼ 0.8: Redshift Evolution and Parameter Dependency

Huang, Chi; Zou, Hu; Kong, Xu; Comparat, Johan; Lin, Zhoubin; Gao, Yongheng; Liang, Zhixiong; Delubac, Timothée; Raichoor, Anand; Kneib, Jean-Paul; Schneider, Donald P.; Zhou, Xu; Yuan, Qirong; Bershady, Matthew A.

doi:10.3847/1538-4357/ab4902

Cited by 30 publications

(43 citation statements)

References 74 publications

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“…This high signal-to-noise spectrum, along with smaller aperture emission line measurements from Hubble Space Telescope and quasar absorption line observations, can all be explained by a selfconsistent outflow model. The ELG spectra of roughly 180,000 galaxies were further investigated to constrain the mass-metallicity relation at high redshift (Huang et al 2019). The results indicate that the 0.6 < z < 1.05 ELGs follow the fundamental metallicity relation that is observed in the local universe.…”

Section: Beyond Cosmology: Astrophysics Results Andmentioning

confidence: 98%

Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory

Alam¹,

Aubert²,

Ávila³

et al. 2021

Phys. Rev. D

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We present the cosmological implications from final measurements of clustering using galaxies, quasars, and Lyα forests from the completed Sloan Digital Sky Survey (SDSS) lineage of experiments in large-scale structure. These experiments, composed of data from SDSS, SDSS-II, BOSS, and eBOSS, offer independent measurements of baryon acoustic oscillation (BAO) measurements of angular-diameter distances and Hubble distances relative to the sound horizon, r d , from eight different samples and six measurements of the growth rate parameter, f σ 8 , from redshift-space distortions (RSD). This composite sample is the most constraining of its kind and allows us to perform a comprehensive assessment of the cosmological model after two decades of dedicated spectroscopic observation. We show that the BAO data alone are able to rule out dark-energy-free models at more than eight standard deviations in an extension to the flat, ΛCDM model that allows for curvature. When combined with Planck Cosmic Microwave Background (CMB) measurements of temperature and polarization, under the same model, the BAO data provide nearly an order of magnitude improvement on curvature constraints relative to primary CMB constraints alone. Independent of distance measurements, the SDSS RSD data complement weak lensing measurements from the Dark Energy Survey (DES) in demonstrating a preference for a flat ΛCDM cosmological model when combined with Planck measurements. The RSD and lensing measurements indicate a growth rate that is consistent with predictions from Planck temperature and polarization data and with General Relativity. When combining the results of SDSS BAO and RSD, Planck, Pantheon Type Ia supernovae (SNe Ia), and DES weak lensing and clustering measurements, all multiple-parameter extensions remain consistent with a ΛCDM model. Regardless of cosmological model, the precision on each of the three ΛCDM parameters, Ω Λ , H 0 , and σ 8 , remains at roughly 1%, showing changes of less than 0.6% in the central values between models. In a model that allows for free curvature and a time-evolving equation of state for dark energy, the combined samples produce a constraint Ω k = −0.0023 ± 0.0022. The dark energy constraints lead to w 0 = −0.912 ± 0.081 and w a = −0.48 +0.36 −0.30 , corresponding to an equation of state of w p = −1.020 ± 0.032 at a pivot redshift z p = 0.29 and a Dark Energy Figure of Merit of 92. The inverse distance ladder measurement under this model yields H 0 = 68.20 ± 0.81 km s −1 Mpc −1 , remaining in tension with several direct determination methods; the BAO data allow Hubble constant estimates that are robust against the assumption of the cosmological model. In addition, the BAO data allow estimates of H 0 that are independent of the CMB data, with similar central values and precision under a ΛCDM model. Our most constraining combination of data gives the upper limit on the sum of neutrino masses at m ν < 0.111 eV (95% confidence). Finally, we consider the improvements in cosmology constraints over the last decade by...

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Section: Beyond Cosmology: Astrophysics Results Andmentioning

confidence: 98%

Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory

Alam¹,

Aubert²,

Ávila³

et al. 2021

Phys. Rev. D

Self Cite

831

600

View full text Add to dashboard Cite

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“…that there is a socalled FMR (e.g. Richard et al 2011;Nakajima et al 2012;Huang et al 2019). One of the successes of the gas-regulator model presented by Lilly et al (2013) was to provide a natural analytic explanation for the presence of SFR as a second parameter and even to predict that the Z(M * , SFR) relation could well be more or less epoch independent.…”

Section: Galactic Scalesmentioning

confidence: 99%

“…that the apparent evolution in the MZR could be accounted for, phenomenologically, by the higher SFR encountered in high redshift galaxies. This universal Z gas (M * , SFR) is therefore known as the "fundamental metallicity relation" (FMR; Mannucci et al 2010;Richard et al 2011;Nakajima et al 2012;Cresci et al 2012;Salim et al 2014;Cresci et al 2019;Huang et al 2019;Curti et al 2020). Cresci et al (2019) finds that the anti-correlation between specific SFR and gas-phase metallicity at given stellar mass, regardless of what the metallicity and SFR indicators are used.…”

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confidence: 99%

Gas-phase Metallicity as a Diagnostic of the Drivers of Star-formation on Different Spatial Scales

Wang,

Lilly

2020

Preprint

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This work mainly includes two parts: the theoretical predictions and observational results on the correlation of SFR and gas-phase metallicity Z gas . We first predict the correlation between SFR, cold gas mass and Z gas in the gas-regulator frame that the instantaneous SFR is regulated by the interplay between inflow, outflow and star formation. The mean SFR is determined by mean inflow rate and mass-loading factor λ, while the mean Z gas is determined by the metallicity of inflow gas Z 0 and the effective yield (y eff ≡ y/(1 + λ)). The SFR and Z gas relative to their mean values, denoted as ∆SFR and ∆Z gas , are found to be negatively (or positively) correlated when driving the gas-regulator with time-varying inflow rate (or SFE). We then study the correlation of ∆sSFR and ∆Z gas (defined in a similar way as in the model) from the observation, at both ∼100 pc scale and galactic scale based on two 2-dimensional spectroscopic surveys with different spatial resolutions, MAD and MaNGA. The metallicity increases strongly with global stellar mass across galaxy population, and decreases with galactic radius within individual galaxies, which can be interpreted as the mass and radial dependence of Z 0 and y eff . After taking out the mass and radial dependence, we find that ∆sSFR and ∆Z gas are found to be, negatively correlated at galactic or sub-galactic scale across galaxy population, and positively correlated at ∼100 pc scale within galaxies. This strongly supports the conclusion that the star formation is primarily driven by the time-varying inflow at galactic scale, and driven by the time-varying SFE at ∼100 pc scale. Furthermore, at sub-galactic scale, the variation of ∆sSFR and ∆Z gas as a function of gas depletion time are well matched with the model predications of time-varying inflow rate, strongly strengthening our conclusion. We build a comprehensive frame to understand the correlation between SFR, cold gas mass and metallicity, as well as the variability of them, which potentially uncovers the relevant physical processes of star formation at different scales.

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“…This means that in the steady-state, both the gas surface density Σ gas (r) and the metallicity Z(r) of the gas disk will not evolve with time (Bouché et al 2010;Lilly et al 2013;Wang & Lilly 2021, also see Paper I). However, we know this may not be true for SF galaxies on cosmological timescales, since strong evolutions of SFR and gas-phase metallicity are seen from observations (Croom et al 2012;Bundy et al 2015;Huang et al 2019;Gillman et al 2021), especially at high redshift. We will consider the case of cosmological evolution in our framework in Section 4 below.…”

Section: The Predicted Steady-statementioning

confidence: 91%

The Gas-phase Metallicity Profiles of Star-forming Galaxies in the Modified Accretion Disk Framework

Wang,

Lilly

2022

Preprint

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Simulations indicate that the inflow of gas of star-forming galaxies is almost co-planar and corotating with the gas disk, and that the outflow of gas driven by stellar winds and/or supernova explosions is preferentially perpendicular to the disk. This indicates that the galactic gas disk can be treated as a modified accretion disk. In this work, we focus on the metal enhancement in galactic disks in this scenario of gas accretion. Assuming that the star formation rate surface density (Σ SFR ) is of exponential form, we obtain the analytic solution of gas-phase metallicity with only three free parameters: the scalelength of Σ SFR , the metallicity of the inflowing gas and the mass-loading factor of the wind. According to this simple model, the negative gradient of gas-phase metallicity is a natural consequence of the radial inflow of cold gas which is continuously enriched by in-situ star formation as it moves towards the disk center. We fit the model to the observed metallicity profiles for six nearby galaxies chosen to have well-measured metallicity profiles extending to very large radii. Our model can well characterize the overall features of the observed metallicity profiles. The observed profiles usually show a floor at the outer regions of the disk, corresponding to the metallicity of inflow gas. Furthermore, we find the scalelength of Σ SFR inferred from these fits agree well with independent estimates from the Hα profiles, supporting the basic model.

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The Mass–Metallicity Relation at z ∼ 0.8: Redshift Evolution and Parameter Dependency

Cited by 30 publications

References 74 publications

Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory

Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory

Gas-phase Metallicity as a Diagnostic of the Drivers of Star-formation on Different Spatial Scales

The Gas-phase Metallicity Profiles of Star-forming Galaxies in the Modified Accretion Disk Framework

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