Spectroscopic Confirmation and Velocity Dispersions for 20 Planck Galaxy Clusters at 0.16 < z < 0.78
Abstract
We present Gemini and Keck spectroscopic redshifts and velocity dispersions for 20 clusters detected via the Sunyaev–Zel'dovich (SZ) effect by the Planck space mission, with estimated masses in the range 2.3 x 10^(14) M⊙ < M^(Pl)_(500) < 9.4 x 10^(14) M⊙.. Cluster members were selected for spectroscopic follow-up with Palomar, Gemini, and Keck optical and (in some cases) infrared imaging. Seven cluster redshifts were measured for the first time with this observing campaign, including one of the most distant Planck clusters confirmed to date, at z = 0.782 ± 0.010, PSZ2 G085.95+25.23. The spectroscopic redshift catalogs of members of each confirmed cluster are included as online tables. We show the galaxy redshift distributions and measure the cluster velocity dispersions. The cluster velocity dispersions obtained in this paper were used in a companion paper to measure the Planck mass bias and to constrain the cluster velocity bias.
Additional Information
© 2018 The American Astronomical Society. Received 2017 August 21; revised 2017 October 20; accepted 2017 October 25; published 2018 January 19. Based on observations obtained at the Gemini Observatory (Programs GN-2011A-Q-119, GN-2011B-Q-41, and GS-2012A-Q-77; P.I. J.G. Bartlett), which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the National Research Council (Canada), CONICYT (Chile), Ministerio de Ciencia, Tecnologa e Innovacin Productiva (Argentina), and Ministrio da Cincia, Tecnologia e Inovao (Brazil). Supported by the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., on behalf of the international Gemini partnership of Argentina, Brazil, Canada, Chile, and the United States of America. This material is based upon work supported by AURA through the National Science Foundation under AURA Cooperative Agreement AST 0132798 as amended. We are pleased to acknowledge the Palomar Observatory staff for their enthusiastic and excellent support. Part of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. We thank the P.I. of the Keck observations, Fiona Harrison, and Mislav Baloković and George Lansbury for participating in the Keck observations. J.G.B. and S.M. acknowledge financial support from the Institut Universitaire de France (IUF) as senior members. Part of the work of J.G.B., C.L., and D.S. was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. S.M.'s research was supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, administered by Universities Space Research Association under contract with NASA. We thank the referee for useful comments that helped improve the presentation of this work, and Joanne Cohn for useful discussion. Facilities: Gemini:South - Gemini South Telescope, Gemini:North - , Palomar:Hale - Palomar Observatory's 5.1m Hale Telescope, Keck:I (LRIS) - KECK I Telescope, Planck - European Space Agency's Planck space observatory.Attached Files
Published - Amodeo_2018_ApJ_853_36.pdf
Submitted - 1711.00021.pdf
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Additional details
- Alternative title
- Spectroscopic confirmation and velocity dispersions for twenty Planck galaxy clusters at 0.16 < z < 0.78
- Eprint ID
- 84433
- Resolver ID
- CaltechAUTHORS:20180119-155100532
- NSF
- AST-0132798
- W. M. Keck Foundation
- Institut Universitaire de France (IUF)
- NASA/JPL/Caltech
- NASA Postdoctoral Program
- Created
-
2018-01-20Created from EPrint's datestamp field
- Updated
-
2021-11-15Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)