Local analogs of high-redshift galaxies: Metallicity calibrations at high-redshift

Fuyan Bian, Lisa J. Kewley, Brent Groves, Michael A. Dopita

    Research output: Contribution to journalArticlepeer-review


    We study the metallicity calibrations in high-redshift galaxies using a sample of local analogs of high-redshift galaxies selected from the SDSS survey. Located in the same region on the BPT diagram as star-forming galaxies at z ∼2, these high-redshift analogs share the same ionized ISM conditions as high-redshift galaxies. We establish empirical metallicity calibrations between the direct gas-phase oxygen abundances and varieties of metallicity indicators in our local analogs using direct Te method. These new metallicity calibrations are the best means to measure the metallicity in high-redshift galaxies. There exist significant offsets between these new high-redshift metallicity calibrations and local calibrations. Such offsets are mainly driven by the evolution of the ionized ISM conditions from high-z to low-z.

    Original languageEnglish
    Pages (from-to)309-313
    Number of pages5
    JournalProceedings of the International Astronomical Union
    Publication statusAccepted/In press - 2020


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