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Hubble flow around Fornax cluster of galaxies

Nasonova, O. G. ; de Freitas Pacheco, J. A. ; Karachentsev, I. D.

Astronomy and astrophysics (Berlin), 2011-08, Vol.532, p.A104 [Periódico revisado por pares]

EDP Sciences

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Citações Citado por
  • Título:
    Hubble flow around Fornax cluster of galaxies
  • Autor: Nasonova, O. G. ; de Freitas Pacheco, J. A. ; Karachentsev, I. D.
  • Assuntos: galaxies: clusters: individual: Fornax
  • É parte de: Astronomy and astrophysics (Berlin), 2011-08, Vol.532, p.A104
  • Notas: The catalog is only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/532/A104
    istex:68DC06E00C29E7860082374EA5371B32FAAE7B7D
    publisher-ID:aa16004-10
    ark:/67375/80W-SGS2LTM7-P
    bibcode:2011A%26A...532A.104N
    dkey:10.1051/0004-6361/201016004
    Née Kashibadze.
  • Descrição: Aims. This work aims to provide a new mass estimate for the Fornax cluster and the Fornax-Eridanus complex, avoiding methods like the virial or fits of the X-ray emission profile, which assume that the system is in equilibrium. This is probably not the case for Fornax, because it is still in process of formation. Methods. Our mass estimate is based on determination of the zero-velocity surface, which, in the context of the spherical infall model, permits an evaluation of the total mass inside such a surface. The zero-velocity surface radius R0 was estimated either by a running median procedure or by fitting the data to the velocity field expected from the spherical model, including effects of the cosmological constant. The velocity field in a region within 20 Mpc of the Fornax center was mapped using a list of 109 galaxies whose distances have an average accuracy of 0.31 mag in their distance modulus. Results. Our analysis indicates that the mass of the Fornax cluster itself is  [0.40−3.32] × 1014   M⊙ inside a radius of  [2.62−5.18] Mpc while the mass inside  [3.88−5.60] Mpc, corresponding to the Fornax-Eridanus complex, is  [1.30−3.93] × 1014   M⊙.
  • Editor: EDP Sciences
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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