A spectroscopic census of A2029 members

DOI

A rich spectroscopic census of members of the local massive cluster A2029 includes 1215 members of A2029 and its two infalling groups, A2033 and the Southern Infalling Group. The two infalling groups are identified in spectroscopic, X-ray, and weak-lensing maps. We identify active galactic nuclei (AGNs), star-forming galaxies, E+A galaxies, and quiescent galaxies based on the spectroscopy. The fractions of AGN and post-starburst E+A galaxies in A2029 are similar to those of other clusters. We derive the stellar mass (M_)-metallicity relation of A2029 based on 227 star-forming members; A2029 members within 10^9^M{sun}<M<10^9.5^M{sun} are more metal-rich than Sloan Digital Sky Survey galaxies within the same mass range. We utilize the spectroscopic index D_n_4000, a strong age indicator, to trace past and future evolution of the A2029 system. The median D_n_4000 of the members decreases as the projected clustercentric distance increases for all three subsystems. The D_n_4000-M*_ relations of the members in A2029 and its two infalling groups differ significantly, indicating the importance of stochastic effects for understanding the evolution of cluster galaxy populations.

Cone search capability for table J/ApJ/872/192/table1 (Physical properties of the spectroscopic members of A2029)

Identifier
DOI http://doi.org/10.26093/cds/vizier.18720192
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJ/872/192
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/872/192
Related Identifier https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/872/192
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJ/872/192
Provenance
Creator Sohn J.; Geller M.J.; Zahid H.J.; Fabricant D.G.
Publisher CDS
Publication Year 2020
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