Metallicity gradients in intermediate-redshift absorption-selected galaxies. Issue Volume 14:Issue A30(2018) (August 2018)

• Record Type: Journal Article
• Authors: Christensen, Lise; Rhodin, Henrik; Møller, Palle
• Editors: Lago, Maria Teresa
• Is Part Of: Proceedings of the International Astronomical Union. Volume 14:Issue A30(2018)
• Page Start: 273
• Page End: 273
• Publication Date: 2018-08
• Subjects: Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921319004344
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: . Metallicity gradients are most frequently investigated directly from galaxies observed in emission. We have shown that galaxies detected via strong quasar absorption lines also exhibits a metallicity gradient in the outskirts and circumgalactic medium out to ~40 kpc distance. We infer a metallicity gradient of −0.022 dex kpc −1 for absorption-selected systems at redshifts 0.1 z 3. Applying this metallicity gradient and a flattening of the gradient beyond 12 kpc, we demonstrate that absorption-selected galaxies obey the same mass-metallicity relation (MZR) as observed for luminosity-selected galaxies.