Strong [OIII]5007 emission-line compact galaxies

DOI

This article reports a sample of 1830 strong [OIII]{lambda}5007 emission-line compact galaxies discovered with the LAMOST spectroscopic survey and the photometric catalog of the Sloan Digital Sky Survey. We newly identify 402 spectra of 346 strong [OIII]{lambda}5007 emission-line compact galaxies by finding compact isolated point sources. Combined with the samples in our previous work, this returns a sample of 1830 unique strong [OIII]{lambda}5007 emission-line compact galaxies with 2033 spectra of z<=0.53. For the sources with 2{sigma}[OIII]{lambda}4363 detections, we calculate the gas-phase metallicity with the direct-Te method, and verify that the strong-line metallicity diagnostics calibrated with the direct-Te method also applies to this sample. The strong [OIII]{lambda}5007 emission-line compact galaxies fall below several Te-calibrated mass-metallicity relations. The N/O measurements of the strong [OIII]{lambda}5007 emission-line compact galaxies mainly locate at a plateau at low metallicity, indicating the product of primary nucleosynthesis. The Ne3O2 and O32 relation follows a tight linear relation with no redshift evolution. The Ne3O2 anticorrelates with the stellar mass, and at fixed stellar mass the Ne3O2 increases with the redshift. Eight sources with asymmetric [OIII]{lambda}5007 emission-line profiles have been identified, however with no [OIII]{lambda}4363 detection, which proves the rich metal content and complex ionized-gas kinematics within the galaxies. Higher-resolution spectroscopy will be necessary to identify the ionized-gas components in detail.

Cone search capability for table J/ApJS/267/16/table1 (Catalog of strong [OIII]{lambda}5007 emission-line compact galaxies from LAMOST DR10 and SDSS)

Identifier
DOI http://doi.org/10.26093/cds/vizier.22670016
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJS/267/16
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/267/16
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/267/16
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJS/267/16
Provenance
Creator Liu S.; Luo A.-L.; Zhang W.; Kong X.; Zhang Y.-X.; Shen S.-Y.; Zhao Y.-H.
Publisher CDS
Publication Year 2023
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Galactic and extragalactic Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics