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[O III] / [N II] as an abundance indicator at high redshift

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TLDR
In this paper, the use of the ratio of nebular lines of [O III] and [N II], first introduced by Alloin et al., is reappraised with modern calibration data and shown to have certain advantages over Ρ 23 ≡ ([On] + [OIII])/Hβ and N2 ≡ [N 2] λ6583/Hα, particularly when applied to star-forming galaxies at high redshifts.
Abstract
Among 'empirical' methods of estimating oxygen abundances in extragalactic H II regions, the use of the ratio of nebular lines of [O III] and [N II], first introduced by Alloin et al., is reappraised with modern calibration data and shown to have certain advantages over Ρ 23 ≡ ([On] + [O III])/Hβ and N2 ≡ [N II] λ6583/Hα, particularly when applied to star-forming galaxies at high redshifts.

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Journal ArticleDOI

The host galaxies and classification of active galactic nuclei

TL;DR: In this paper, the authors present an analysis of the host properties of 85224 emission-line galaxies selected from the Sloan Digital Sky Survey and derive a new empirical classification scheme which cleanly separates star-forming galaxies, composite AGN-H ii galaxies, Seyferts and LINERs and study the host galaxy properties of these different classes of objects.
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Metallicity Calibrations and the Mass-Metallicity Relation for Star-forming Galaxies

TL;DR: In this article, the effect of metallicity calibrations, AGN classification, and aperture covering fraction on the local mass-metallicity relation using 27,730 star-forming galaxies from the Sloan Digital Sky Survey (SDSS) Data Release 4.
Journal ArticleDOI

The Mass-Metallicity Relation at z≳2*

TL;DR: In this paper, a sample of 87 rest-frame UV-selected star-forming galaxies with mean spectroscopic redshift z = 2.26 ± 0.17 was used to study the correlation between metallicity and stellar mass at high redshift.
Journal ArticleDOI

CALIFA, the Calar Alto Legacy Integral Field Area survey : I. Survey presentation

Sebastián F. Sánchez, +84 more
TL;DR: The Calar Alto Legacy Integral Field Area (CALIFA) survey as discussed by the authors was designed to provide a first step in this direction by obtaining spatially resolved spectroscopic information of a diameter selected sample of similar to 600 galaxies in the Local Universe.
References
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Journal ArticleDOI

Classification parameters for the emission-line spectra of extragalactic objects

TL;DR: In this paper, the merits of various emission-line intensity ratios for classifying the spectra of extragalactic objects were investigated and it was shown empirically that several combinations of easily-measured lines can be used to separate objects into one of four categories according to the principal excitation mechanism: normal H II regions, planetary nebulae, objects photoionized by a power-law continuum, and objects excited by shock-wave heating.
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Using Strong Lines to Estimate Abundances in Extragalactic H II Regions and Starburst Galaxies

TL;DR: In this article, the authors used a combination of stellar population synthesis and photoionization models to develop a set of ionization parameter and abundance diagnostics based only on the use of the strong optical emission lines.
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Using Strong Lines to Estimate Abundances in Extragalactic HII Regions and Starburst Galaxies

TL;DR: In this paper, a combination of stellar population synthesis and photoionization models is used to develop a set of ionization parameter and abundance diagnostics based only on the use of the strong optical emission lines.
Journal ArticleDOI

The Forbidden Abundance of Oxygen in the Sun

TL;DR: In this article, the solar photospheric line at 6300 A was reexamine closely, which is attributed to a forbidden line of neutral oxygen and is widely used in analyses of other late-type stars.
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The Rest-Frame Optical Spectra of Lyman Break Galaxies: Star Formation, Extinction, Abundances, and Kinematics*

TL;DR: In this paper, the first results of a spectroscopic survey of Lyman break galaxies (LBGs) in the near-infrared aimed at detecting the emission lines of [O II], [O III], and Hβ from the H II regions of normal star-forming galaxies at z 3.
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