{"id":832384,"date":"2022-04-04T15:40:08","date_gmt":"2022-04-04T22:40:08","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/?post_type=msr-research-item&p=832384"},"modified":"2022-04-04T15:40:08","modified_gmt":"2022-04-04T22:40:08","slug":"the-mass-metallicity-and-luminosity-metallicity-relations-from-deep2-at-z-0-8","status":"publish","type":"msr-research-item","link":"https:\/\/www.microsoft.com\/en-us\/research\/publication\/the-mass-metallicity-and-luminosity-metallicity-relations-from-deep2-at-z-0-8\/","title":{"rendered":"The Mass-Metallicity and Luminosity-Metallicity Relations from DEEP2 at z ~ 0.8"},"content":{"rendered":"

We present the mass-metallicity (MZ) and luminosity-metallicity (LZ) relations at z ~ 0.8 from ~1350 galaxies in the Deep Extragalactic Evolutionary Probe 2 survey. We determine stellar masses by fitting the spectral energy distribution inferred from photometry with current stellar population synthesis models. This work raises the number of galaxies with metallicities at z ~0.8 by more than an order of magnitude. We investigate the evolution in the MZ and LZ relations in comparison with local MZ and LZ relations determined in a consistent manner using ~21, 000 galaxies in the Sloan Digital Sky Survey. We show that high stellar mass galaxies (M ~ 1010.6<\/sup> M sun<\/sub>) at z ~0.8 have attained the chemical enrichment seen in the local universe, while lower stellar mass galaxies (M ~ 109.2<\/sup> M sun<\/sub>) at z ~0.8 have lower metallicities (\u0394log(O\/H) ~ 0.15 dex) than galaxies at the same stellar mass in the local universe. We find that the LZ relation evolves in both metallicity and B-band luminosity between z ~0.8 and z ~ 0, with the B-band luminosity evolving as a function of stellar mass. We emphasize that the B-band luminosity should not be used as a proxy for stellar mass in chemical evolution studies of star-forming galaxies. Our study shows that both the metallicity evolution and the B-band luminosity evolution for emission-line galaxies between the epochs are a function of stellar mass, consistent with the cosmic downsizing scenario of galaxy evolution.<\/p>\n","protected":false},"excerpt":{"rendered":"

We present the mass-metallicity (MZ) and luminosity-metallicity (LZ) relations at z ~ 0.8 from ~1350 galaxies in the Deep Extragalactic Evolutionary Probe 2 survey. We determine stellar masses by fitting the spectral energy distribution inferred from photometry with current stellar population synthesis models. This work raises the number of galaxies with metallicities at z ~0.8 […]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":[{"type":"user_nicename","value":"Jabran 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