Skip navigation
  • INAF logo
  • Home
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects
  • Explore by
    • Research outputs
    • Researchers
    • Organization units
    • Projects
  • Login:
    • My DSpace
    • Receive email
      updates
    • Edit Account details
  • Italian
  • English

  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/27704
Title: Gravitational lensing detection of an extremely dense environment around a galaxy cluster
Authors: Sereno, Mauro 
GIOCOLI, CARLO 
IZZO, LUCA
Marulli, Federico
Veropalumbo, Alfonso
ETTORI, STEFANO 
MOSCARDINI, LAURO
COVONE, GIOVANNI
Ferragamo, Antonio
Barrena, Rafael
Streblyanska, Alina
Issue Date: 2018
Journal: NATURE ASTRONOMY 
Number: 2
First Page: 744
Abstract: Galaxy clusters form at the highest-density nodes of the cosmic web<SUP>1,2</SUP>. The clustering of dark matter halos hosting these galaxy clusters is enhanced relative to the general mass distribution, with the matter density beyond the virial region being strongly correlated to the halo mass (halo bias)<SUP>3</SUP>. Halo properties other than mass can further enhance the halo clustering (secondary bias)<SUP>4-7</SUP>. Observational campaigns have ascertained the halo bias<SUP>8-10</SUP>, but efforts to detect this secondary bias for massive halos have been inconclusive<SUP>11-13</SUP>. Here, we report the analysis of the environment bias in a sample of massive clusters, selected through the Sunyaev-Zel'dovich effect by the Planck mission<SUP>14,15</SUP>, focusing on the detection of the environment dark matter correlated to a single cluster, PSZ2 G099.86+58.45. The gravitational lensing signal of the outskirts is very large and can be traced up to 30 megaparsecs with a high signal-to-noise ratio (about 3.4), implying environment matter density in notable excess of the cosmological mean. Our finding reveals this system to be extremely rare in the current paradigm of structure formation and, implies that enhancing mechanisms around high-mass halos can be very effective. Future lensing surveys will probe the surroundings of single haloes, enabling the study of their formation and evolution of structure.
URI: http://hdl.handle.net/20.500.12386/27704
URL: https://www.nature.com/articles/s41550-018-0508-y
ISSN: 2397-3366
DOI: 10.1038/s41550-018-0508-y
Bibcode ADS: 2018NatAs...2..744S
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat 
1807.04277.pdfpostprint1.5 MBAdobe PDFView/Open
Nat.as41550-018-0508-y.pdf[Administrators only]3.69 MBAdobe PDF
Show full item record

Page view(s)

18
checked on Jan 24, 2021

Download(s)

8
checked on Jan 24, 2021

Google ScholarTM

Check

Altmetric


Items in DSpace are published in Open Access, unless otherwise indicated.


Explore by
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects

Informazioni e guide per autori

https://openaccess-info.inaf.it: tutte le informazioni sull'accesso aperto in INAF

Come si inserisce un prodotto: le guide a OA@INAF

La Policy INAF sull'accesso aperto

Documenti e modelli scaricabili

Feedback
Built with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE