Testing phenomenological and theoretical models of dark matter density profiles with galaxy clusters (2013)
- Authors:
- USP affiliated authors: LIMA, MARCOS VINICIUS BORGES TEIXEIRA - IF ; SODRE JUNIOR, LAERTE - IAG
- Unidades: IF; IAG
- Subjects: COSMOLOGIA; MATÉRIA ESCURA; GALÁXIAS; CLUSTERS
- Language: Inglês
- Abstract: We use the stacked gravitational lensing mass profile of four high-mass s (M & 1015M⊙)galaxy clusters around z ≈ 0.3 from Umetsu et al. to fit density profiles of phenomenological [Navarro-Frenk-White (NFW), Einasto, Sérsic, Stadel, Baltz-Marshall-Oguri (BMO) and Hernquist] and theoretical (non-singular Isothermal Sphere, DARKexp and Kang & He) models of the dark matter distribution. We account for large-scale structure effects, including a 2-halo term in the analysis. We find that the BMO model provides the best fit to the data as measured by the reduced χ 2 . It is followed by the Stadel profile, the generalized NFW profile with a free inner slope and by the Einasto profile. The NFW model provides the best fit if we neglect the 2-halo term, in agreement with results from Umetsu et al. Among the theoretical profiles, the DARKexp model with a single form parameter has the best performance, very close to that of the BMO profile. This may indicate a connection between this theoretical model and the phenomenology of dark matter halos, shedding light on the dynamical basis of empirical profiles which emerge from numerical simulations.
- Imprenta:
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ABNT
SILVA, Leandro José Beraldo e e LIMA, Marcos Vinicius Borges Teixeira e SODRÉ JÚNIOR, Laerte. Testing phenomenological and theoretical models of dark matter density profiles with galaxy clusters. . São Paulo: Instituto de Física, Universidade de São Paulo. Disponível em: http://lanl.arxiv.org/pdf/1301.1684v2.pdf. Acesso em: 16 abr. 2024. , 2013 -
APA
Silva, L. J. B. e, Lima, M. V. B. T., & Sodré Júnior, L. (2013). Testing phenomenological and theoretical models of dark matter density profiles with galaxy clusters. São Paulo: Instituto de Física, Universidade de São Paulo. Recuperado de http://lanl.arxiv.org/pdf/1301.1684v2.pdf -
NLM
Silva LJB e, Lima MVBT, Sodré Júnior L. Testing phenomenological and theoretical models of dark matter density profiles with galaxy clusters [Internet]. 2013 ;[citado 2024 abr. 16 ] Available from: http://lanl.arxiv.org/pdf/1301.1684v2.pdf -
Vancouver
Silva LJB e, Lima MVBT, Sodré Júnior L. Testing phenomenological and theoretical models of dark matter density profiles with galaxy clusters [Internet]. 2013 ;[citado 2024 abr. 16 ] Available from: http://lanl.arxiv.org/pdf/1301.1684v2.pdf - Statistical mechanics of self-gravitating systems: mixing as a criterion for indistinguishability
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