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Grant support

This work has been made possible by the 'The Three Hundred' collaboration. 12 The project has received financial support from the European Union's H2020 Marie Sklodowska-Curie Actions grant number 734374, i.e. the LACEGAL project.

Analysis of institutional authors

Knebe, AlexanderAuthorCui, WeiguangAuthorMostoghiu, RobertAuthor

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Article

The Three Hundred project: shapes and radial alignment of satellite, infalling, and backsplash galaxies

Publicated to:MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 495 (3): 3002-3013 - 2020-05-14 495(3), DOI: 10.1093/mnras/staa1407

Authors: Knebe, Alexander; Gamez-Marin, Matias; Pearce, Frazer R.; Cui, Weiguang; Hoffmann, Kai; De Petris, Marco; Power, Chris; Haggar, Roan; Mostoghiu, Robert;

Affiliations

Ist Nazl Fis Nucl, Sez Roma, Ple A Moro 2, I-00185 Rome, Italy - Author
Sapienza Univ Roma, Dept Phys, Ple Aldo Moro 5, I-00185 Rome, Italy - Author
Univ Autonoma Madrid, Dept Fis Teor, Fac Ciencias, Modulo 15, Madrid 28049, Spain - Author
Univ Autonoma Madrid, Fac Ciencias, Ctr Invest Avanzada Fis Fundamental CIAFF, Madrid 28049, Spain - Author
Univ Edinburgh, Inst Astron, Royal Observ, 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
Univ Zurich, Inst Computat Sci, Winterthurerstr 190, CH-8057 Zurich, Switzerland - Author
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Abstract

Using 324 numerically modelled galaxy clusters, we investigate the radial and galaxy halo alignment of dark matter subhaloes and satellite galaxies orbiting within and around them. We find that radial alignment depends on distance to the centre of the galaxy cluster but appears independent of the dynamical state of the central host cluster. Furthermore, we cannot find a relation between radial alignment of the halo or galaxy shape with its own mass. We report that backsplash galaxies, i.e. objects that have already passed through the cluster radius but are now located in the outskirts, show a stronger radial alignment than infalling objects. We further find that there exists a population of well radially aligned objects passing very close to the central cluster's centre that were found to be on highly radial orbit.

Keywords

ClustersCosmological simulationsCosmology: theoryDark-matter subhaloesEagleEvolutionGalaxies: clusters: generalGalaxies: formationGalaxies: haloesHaloesIntrinsic alignmentsLarge-scale structure of the universeMethods: numericalModelOrientationSubstructure

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: 1.42. 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:

  • Weighted Average of Normalized Impact by the Scopus agency: 2.21 (source consulted: FECYT Feb 2024)
  • Field Citation Ratio (FCR) from Dimensions: 16.37 (source consulted: Dimensions Jun 2025)

Specifically, and according to different indexing agencies, this work has accumulated citations as of 2025-06-18, the following number of citations:

  • WoS: 21
  • Scopus: 32
  • OpenCitations: 30

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 2025-06-18:

  • 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: 29.
  • 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: 29 (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: 0.5.
  • The number of mentions on the social network X (formerly Twitter): 2 (Altmetric).

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; Italy; Switzerland; 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: First Author (KNEBE ., ALEXANDER) and Last Author (MOSTOGHIU, ROBERT ADRIEL).