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- W4311556806 abstract "ESO 137-G006 is the brightest cluster galaxy (BCG) of the cool-core and dynamically young Norma cluster. We discover an atomic hydrogen (HI) absorption line associated with this BCG using the Australia Telescope Compact Array. We estimate a gas column density of $ approx (1.3 pm 0.2) times 10^{20},T_{rm{spin}}$ atoms cm$^{-2}$ with spin temperature, $T_{rm{spin}} leq 194$ K, consistent with the HI properties of other early-type galaxies and cool-core cluster BCGs. The relationship between the presence of cold gas and a cluster cooling flow is unclear. Our results support the scenario that ESO 137-G006 may be a recent arrival to the cluster centre and not the original BCG. This scenario is consistent with the observed spatial alignment of the BCG's wide-angle tail radio lobes with Norma's X-ray sub-cluster and the significant line-of-sight velocity offset between the mean velocity of Norma and that of the BCG." @default.
- W4311556806 created "2022-12-27" @default.
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- W4311556806 date "2022-12-13" @default.
- W4311556806 modified "2023-09-27" @default.
- W4311556806 title "HI absorption associated with Norma's brightest cluster galaxy" @default.
- W4311556806 doi "https://doi.org/10.48550/arxiv.2212.06680" @default.
- W4311556806 hasPublicationYear "2022" @default.
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