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Pilot-WINGS: An extended MUSE view of the structure of Abell 370

Lagattuta, David J. and Richard, Johan and Bauer, Franz Erik and Cerny, Catherine and Claeyssens, Adélaïde and Guaita, Lucia and Jauzac, Mathilde and Jeanneau, Alexandre and Koekemoer, Anton M. and Mahler, Guillaume and Prieto Lyon, Gonzalo and Acebron, Ana and Meneghetti, Massimo and Niemiec, Anna and Zitrin, Adi and Bianconi, Matteo and Connor, Thomas and Cen, Renyue and Edge, Alastair and Faisst, Andreas L. and Limousin, Marceau and Massey, Richard and Sereno, Mauro and Sharon, Keren and Weaver, John R. (2022) Pilot-WINGS: An extended MUSE view of the structure of Abell 370. Monthly Notices of the Royal Astronomical Society, 514 (1). pp. 497-517. ISSN 0035-8711. doi:10.1093/mnras/stac418.

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We investigate the strong-lensing cluster Abell 370 (A370) using a wide Integral Field Unit (IFU) spectroscopic mosaic from the Multi-Unit Spectroscopic Explorer (MUSE). IFU spectroscopy provides significant insight into the structure and mass content of galaxy clusters, yet IFU-based cluster studies focus almost exclusively on the central Einstein-radius region. Covering over 14 arcmin2, the new MUSE mosaic extends significantly beyond the A370 Einstein radius, providing, for the first time, a detailed look at the cluster outskirts. Combining these data with wide-field, multi-band Hubble Space Telescope (HST) imaging from the BUFFALO project, we analyse the distribution of objects within the cluster and along the line of sight. Identifying 416 cluster galaxies, we use kinematics to trace the radial mass profile of the halo, providing a mass estimate independent from the lens model. We also measure radially averaged properties of the cluster members, tracking their evolution as a function of infall. Thanks to the high spatial resolution of our data, we identify six cluster members acting as galaxy–galaxy lenses, which constrain localized mass distributions beyond the Einstein radius. Finally, taking advantage of MUSE’s 3D capabilities, we detect and analyse multiple spatially extended overdensities outside of the cluster that influence lensing-derived halo mass estimates. We stress that much of this work is only possible thanks to the robust, extended IFU coverage, highlighting its importance even in less optically dense cluster regions. Overall, this work showcases the power of combining HST + MUSE, and serves as the initial step towards a larger and wider program targeting several clusters.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper ItemData
Lagattuta, David J.0000-0002-7633-2883
Richard, Johan0000-0001-5492-1049
Bauer, Franz Erik0000-0002-8686-8737
Cerny, Catherine0000-0002-8261-9098
Jauzac, Mathilde0000-0003-1974-8732
Koekemoer, Anton M.0000-0002-6610-2048
Mahler, Guillaume0000-0003-3266-2001
Acebron, Ana0000-0003-3108-9039
Meneghetti, Massimo0000-0003-1225-7084
Niemiec, Anna0000-0003-3791-2647
Zitrin, Adi0000-0002-0350-4488
Bianconi, Matteo0000-0002-0427-5373
Connor, Thomas0000-0002-7898-7664
Cen, Renyue0000-0001-8531-9536
Faisst, Andreas L.0000-0002-9382-9832
Massey, Richard0000-0002-6085-3780
Sereno, Mauro0000-0003-0302-0325
Sharon, Keren0000-0002-7559-0864
Weaver, John R.0000-0003-1614-196X
Additional Information:© 2022 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. Received: 10 September 2021. Revision received: 29 January 2022. Accepted: 07 February 2022. Published: 01 June 2022. The authors wish to thank Jose M. Diego for helpful discussions and input when creating the galaxy-galaxy lensing catalogue used in this work. DJL, ACE, and RM are supported by Science and Technology Facilities Council (STFC) grants ST/T000244/1 and ST/W002612/1. MJ is supported by the United Kingdom Research and Innovation (UKRI) Future Leaders Fellowship ‘Using Cosmic Beasts to uncover the Nature of Dark Matter’ (grant number MR/S017216/1). MS acknowledges financial contribution from contract Agenzia Spaziale Italiana Istituto Nazionale di Astrofisica (ASI-INAF) n.2017-14-H.0 and from contract INAF mainstream project RC is supported in part by HST-GO-15117. FEB acknowledges support from Agencia Nacional de Investigación y Desarrollo (ANID)-Chile Basal AFB-170002 and FB210003, Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT) Regular 1200495 and 1190818, and Millennium Science Initiative Program - ICN12_009. GM received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No MARACAS - DLV-896778. The work of TC was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. AZ acknowledges support by Grant No. 2020750 from the United States-Israel Binational Science Foundation (BSF) and Grant No. 2109066 from the United States National Science Foundation (NSF), and by the Ministry of Science & Technology, Israel. DATA AVAILABILITY. The data underlying this article are available in the article itself, its online supplementary material, and at the following url:
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)ST/T000244/1
Science and Technology Facilities Council (STFC)ST/W002612/1
United Kingdom Research and Innovation (UKRI)MR/S017216/1
Agenzia Spaziale Italiana (ASI)2017-14-H.0
Istituto Nazionale di Astrofisica (INAF)
Agencia Nacional de Investigación y Desarrollo (ANID)FB210003
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1200495
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1190818
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)ICN12_009
Marie Curie Fellowship896778
Binational Science Foundation (USA-Israel)2020750
Ministry of Science and Technology (Israel)UNSPECIFIED
Subject Keywords:gravitational lensing: strong –techniques: imaging spectroscopy –galaxies: clusters: individual: Abell 370 –galaxies: kinematics and dynamics –dark matter –large-scale structure of Universe
Issue or Number:1
Record Number:CaltechAUTHORS:20220802-743346000
Persistent URL:
Official Citation:David J Lagattuta, Johan Richard, Franz Erik Bauer, Catherine Cerny, Adélaïde Claeyssens, Lucia Guaita, Mathilde Jauzac, Alexandre Jeanneau, Anton M Koekemoer, Guillaume Mahler, Gonzalo Prieto Lyon, Ana Acebron, Massimo Meneghetti, Anna Niemiec, Adi Zitrin, Matteo Bianconi, Thomas Connor, Renyue Cen, Alastair Edge, Andreas L Faisst, Marceau Limousin, Richard Massey, Mauro Sereno, Keren Sharon, John R Weaver, Pilot-WINGS: An extended MUSE view of the structure of Abell 370, Monthly Notices of the Royal Astronomical Society, Volume 514, Issue 1, July 2022, Pages 497–517,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:116022
Deposited By: George Porter
Deposited On:02 Aug 2022 20:04
Last Modified:02 Aug 2022 20:04

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