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Grant support

This work has been made possible by THETHREEHUNDRED collaboration.3 This work has received financial support from the European Union's Horizon 2020 Research and Innovation programme under the Marie Sklodowskaw-Curie grant agreement number 734374, i.e. the LACEGAL project.4 THETHREEHUNDRED simulations used in this paper have been performed in the MareNostrum Supercomputer at the Barcelona Supercomputing Center, due to CPU time granted by the Red Espanola de Supercomputacion.RH acknowledges support from the Science and Technology Facilities Council (STFC) through a studentship. AK, RM, and GY are supported by the Ministerio de Economia y Competitividad and the Fondo Europeo de Desarrollo Regional (MINECO/FEDER, UE) in Spain through grant AYA2015-63810-P. AK and GY would also like to thank MINECO/FEDER (Spain) for financial support under research grants AYA2015-63819-P and PGC2018-094975-C2. AK further acknowledges support from the Spanish Red Consolider MultiDark FPA2017-90566-REDC and thanks East Village for precious diamond tears.

Analysis of institutional authors

Knebe, AlexanderAuthorCui, WeiguangAuthorMostoghiu, RobertAuthorYepes, GustavoAuthor

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June 21, 2022
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Article

THETHREEHUNDRED project: backsplash galaxies in simulations of clusters

Publicated to:MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 492 (4): 6074-6085 - 2020-03-01 492(4), DOI: 10.1093/mnras/staa273

Authors: Haggar, R; Gray, ME; Pearce, FR; Knebe, A; Cui, WG; Mostoghiu, R; Yepes, G

Affiliations

Univ Autonoma Madrid, CIAFF, E-28049 Madrid, Spain - Author
Univ Autonoma Madrid, Dept Fis Teor, Modulo 15, E-28049 Madrid, Spain - Author
Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland - Author
Univ Nottingham, Sch & Phys & Astron, Nottingham NG7 2RD, England - Author
Univ Western Australia, Int Ctr Radio Astron Res, 35 Stirling Highway, Crawley, WA 6009, Australia - Author
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Abstract

In the outer regions of a galaxy cluster, galaxies either may be falling into the cluster for the first time or have already passed through the cluster centre at some point in their past. To investigate these two distinct populations, we utilize THETIIREEHUNDRED project, a suite of 324 hydrodynamical resimulations of galaxy clusters. In particular, we study the 'backsplash population' of galaxies: those that have passed within R290 of the cluster centre at some time in their history, but are now outside of this radius, We find that, 011 average, over half of all galaxies between R39 and 2R290 from their host at z = 0 are backsplash galaxies, but that this fraction is dependent on the dynamical stale of a cluster, as dynamically relaxed clusters have a greater backsplash fraction, We also find that this population is mostly developed at recent times (z < 0,4), and is dependent on the recent history of a cluster, Finally, we show that the dynamical state of a given cluster, and thus the fraction of backsplash galaxies in its outskirts, can be predicted based on observational properties of the cluster,

Keywords

3 hundred projectDark-matterEvolutionGalaxies: clusters: generalGalaxies: generalHaloesMassMethods: numericalMorphologySubhaloesSubstructure

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2020, it was in position 16/68, thus managing to position itself as a Q1 (Primer Cuartil), in the category Astronomy & Astrophysics.

From a relative perspective, and based on the normalized impact indicator calculated from World Citations provided by WoS (ESI, Clarivate), it yields a value for the citation normalization relative to the expected citation rate of: 3.46. This indicates that, compared to works in the same discipline and in the same year of publication, it ranks as a work cited above average. (source consulted: ESI Nov 14, 2024)

This information is reinforced by other indicators of the same type, which, although dynamic over time and dependent on the set of average global citations at the time of their calculation, consistently position the work at some point among the top 50% most cited in its field:

  • Field Citation Ratio (FCR) from Dimensions: 35.99 (source consulted: Dimensions Jul 2025)

Specifically, and according to different indexing agencies, this work has accumulated citations as of 2025-07-09, the following number of citations:

  • WoS: 51
  • Scopus: 65
  • Google Scholar: 82

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-07-09:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 26.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 26 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 5.

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.

Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: Australia; United Kingdom.

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: Last Author (Yepes, G).