SIMBAD references

2017ApJ...841L..21H - Astrophys. J., 841, L21-L21 (2017/June-1)

Evolutionary phases of gas-rich galaxies in a galaxy cluster at z = 1.46.

HAYASHI M., KODAMA T., KOHNO K., YAMAGUCHI Y., TADAKI K.-I., HATSUKADE B., KOYAMA Y., SHIMAKAWA R., TAMURA Y. and SUZUKI T.L.

Abstract (from CDS):

We report a survey of molecular gas in galaxies in the XMMXCS J2215.9-1738 cluster at z = 1.46. We have detected emission lines from 17 galaxies within a radius of R200 from the cluster center, in Band 3 data of the Atacama Large Millimeter/submillimeter Array, with a coverage of 93-95 GHz in frequency and 2.33 arcmin2 in spatial direction. The lines are all identified as CO J = 2-1 emission lines from cluster members at z∼1.46 by their redshifts and the colors of their optical and near-infrared (NIR) counterparts. The line luminosities reach down to LCO(2–1)^′^=4.5×109 K km s–1 pc2. The spatial distribution of galaxies with a detection of CO(2-1) suggests that they disappear from the very center of the cluster. The phase-space diagram showing relative velocity versus cluster-centric distance indicates that the gas-rich galaxies have entered the cluster more recently than the gas-poor star-forming galaxies and passive galaxies located in the virialized region of this cluster. The results imply that the galaxies experienced ram-pressure stripping and/or strangulation during the course of infall toward the cluster center and then the molecular gas in the galaxies at the cluster center was depleted by star formation.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: clusters: individual: XMMXCS J2215.9-1738 - galaxies: evolution - galaxies: ISM - galaxies: ISM

Nomenclature: Table 1: [HKK2017] ALMA.B3.NN (Nos 1-17).

Simbad objects: 18

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2020.11.25-15:15:38

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