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Date and Time of the Query: 2019-06-25 T17:27:00 PDT
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For refcode 2011A&A...532A.104N:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2011A&A...532A.104N Hubble flow around Fornax cluster of galaxies Nasonova, O. G.; de Freitas Pacheco, J. A.; Karachentsev, I. D. Abstract. 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 R_0_ 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] x 10^14^ M_sun;_ inside a radius of [2.62-5.18] Mpc while the mass inside [3.88-5.60] Mpc, corresponding to the Fornax-Erida{nu}s complex, is [1.30-3.93] x 10^14^ M_sun;_. Key words: galaxies: clusters: individual: Fornax
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