Local analogs of high-redshift galaxies: Metallicity calibrations at high-redshift. Issue Volume 15:Issue S352(2019) (June 2019)

• Record Type: Journal Article
• Authors: Bian, Fuyan; Kewley, Lisa J.; Groves, Brent; Dopita, Michael A.
• Editors: da Cunha, Elisabete; Hodge, Jacqueline; Afonso, José; Pentericci, Laura; Sobral, David
• Is Part Of: Proceedings of the International Astronomical Union. Volume 15:Issue S352(2019)
• Page Start: 309
• Page End: 313
• Publication Date: 2019-06
• Subjects: galaxies: high-redshift, -- ISM: abundances, -- galaxies: abundances, -- galaxies: ISM; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921320000800
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: 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 T e 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.