Discovery of an H SPAN CLASS="sml" i-rich Gas Reservoir in the Outskirts of SZ-effect-selected Clusters
Astrophysical Journal Letters, ISSN: 2041-8213, Vol: 846, Issue: 1
2017
- 15Citations
- 7Captures
- 1Mentions
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Article Description
We report on the detection of three strong H i absorbers originating in the outskirts (i.e., impact parameter, (1.6-4.7)r ) of three massive ( M ) clusters of galaxies at redshift , in the Hubble Space Telescope Cosmic Origins Spectrograph (HST/COS) spectra of three background UV-bright quasars. These clusters were discovered by the 2500 deg South Pole Telescope Sunyaev-Zel'dovich (SZ) effect survey. All three COS spectra show a partial Lyman limit absorber with N(H i) >10 cm near the photometric redshifts () of the clusters. The compound probability of the random occurrence of all three absorbers is <0.02%, indicating that the absorbers are most likely related to the targeted clusters. We find that the outskirts of these SZ-selected clusters are remarkably rich in cool gas compared to existing observations of other clusters in the literature. The effective Doppler parameters of the Lyman series lines, obtained using a single-cloud curve-of-growth (COG) analysis, suggest a nonthermal/turbulent velocity of a few×10 km s in the absorbing gas. We emphasize the need for uniform galaxy surveys around these fields and for more UV observations of quasar-cluster pairs in general in order to improve the statistics and gain further insights into the unexplored territory of the largest collapsed cosmic structures.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85028771525&origin=inward; http://dx.doi.org/10.3847/2041-8213/aa8559; https://iopscience.iop.org/article/10.3847/2041-8213/aa8559; https://dx.doi.org/10.3847/2041-8213/aa8559; https://validate.perfdrive.com/9730847aceed30627ebd520e46ee70b2/?ssa=edaf9449-c29a-4afe-97ed-ebc4bc1c2689&ssb=34024235256&ssc=https%3A%2F%2Fiopscience.iop.org%2Farticle%2F10.3847%2F2041-8213%2Faa8559&ssi=bd68f82f-cnvj-478d-8792-4b18ee5110d2&ssk=botmanager_support@radware.com&ssm=370383862325849958205945341041512905&ssn=df1cd078aaf694b92b57bdca7de8d89f67eb0900c3c4-8990-4f21-ac58fa&sso=faeb7f8c-bc564dd29dea66597085770b15f32a680d8eba5762568c5c&ssp=06429173931726579808172712333838261&ssq=62111120139783387309929239302449157183069&ssr=NTIuMy4yMTcuMjU0&sst=com.plumanalytics&ssu=&ssv=&ssw=&ssx=eyJfX3V6bWYiOiI3ZjYwMDBkNzYzNGE3Ni05ZTRkLTRjMmMtYjJhMC1mYzAzNGMyZjE1MjkxNzI2NTI5MjM5NDUzNTcyMTU4NDIwLTgzNmE2Y2Q1MzU0NzExMzc4MjAzOTkiLCJyZCI6ImlvcC5vcmciLCJ1em14IjoiN2Y5MDAwMGMxZDc2YmItMzk2MS00N2VjLTlkZGItNjdmYTVhZTY2ODdlOC0xNzI2NTI5MjM5NDUzNTcyMTU4NDIwLWQwZmM2YTdkMWU3MTQzZGE4MjAzMTIifQ==
American Astronomical Society
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