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| DOI | 10.1093/MNRAS/STW1269 | ||||
| Año | 2016 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We present an axially symmetric formula to calculate the probability of finding gravitational arcs in galaxy clusters, being induced by their massive dark matter haloes, as a function of clusters redshifts and virial masses. The formula includes the ellipticity of the clusters dark matter potential by using a pseudo-elliptical approximation. The probabilities are calculated and compared for two dark matter halo profiles, the Navarro, Frenk and White (NFW) and the non-singular- isothermal-sphere (NSIS). We demonstrate the power of our formulation through a Kolmogorov-Smirnov (KS) test on the strong lensing statistics of an X-ray bright sample of low-redshift Abell clusters. This KS test allows us to establish limits on the values of the concentration parameter for the NFW profile (c(Delta)) and the core radius for the NSIS profile (r(c)), which are related to the lowest cluster redshift (z(cut)) where strong arcs can be observed. For NFW dark matter profiles, we infer cluster haloes with concentrations that are consistent to those predicted by Lambda CDM simulations. As for NSIS dark matter profiles, we find only upper limits for the clusters core radii and thus do not rule out a purely SIS model. For alternative mass profiles, our formulation provides constraints through zcut on the parameters that control the concentration of mass in the inner region of the clusters haloes. We find that zcut is expected to lie in the 0.0-0.2 redshift, highlighting the need to include very low-z clusters in samples to study the clusters mass profiles.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Saez, Cristian | Hombre |
Korea Astron & Space Sci Inst KASI - Corea del Sur
UNIV MARYLAND - Estados Unidos Korea Astronomy and Space Science Institute - Corea del Sur University of Maryland - Estados Unidos University of Maryland, College Park - Estados Unidos |
| 2 | CAMPUSANO-BROWN, LUIS EDUARDO | Hombre |
Universidad de Chile - Chile
Centro de Excelencia en Astrofísica y Tecnologías Afines - Chile |
| 3 | Cypriano, E. | - |
UNIV SAO PAULO - Brasil
Universidade de Sao Paulo - USP - Brasil Universidade de São Paulo - Brasil |
| 4 | Sodre Jr, L. | Hombre |
UNIV SAO PAULO - Brasil
Universidade de Sao Paulo - USP - Brasil Universidade de São Paulo - Brasil |
| 5 | Kneib, Jean-Paul | Hombre |
EPFL - Suiza
Aix Marseille Univ - Francia Swiss Federal Institute of Technology EPFL, Lausanne - Suiza Laboratoire d'Astrophysique de Marseille - Francia Ecole Polytechnique Fédérale de Lausanne - Suiza Aix Marseille Université - Francia |
| Fuente |
|---|
| CONICYT-Chile |
| CNPq |
| FAPESP |
| Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) |
| CNRS |
| ERC |
| Center of Excellence in Astrophysics and Associated Technologies |
| FORMAS |
| CONICYT Anillo project |
| VINNOVA |
| Agradecimiento |
|---|
| We thank the anonymous referee for his/her insightful comments that helped us improve this work. JPK acknowledges support from the ERC advanced grant LIDA and from CNRS. LSJ is partially supported by FAPESP (project 2012/00800-4) and CNPq. ESC is partially supported by FAPESP(2014/13723-3) and CNPq. LEC received partial support from the Center of Excellence in Astrophysics and Associated Technologies (PFB06) and from CONICYT Anillo project ACT-1122. CS acknowledges support from CONICYT-Chile (FONDECYT 3120198 and Becas Chile 74140006). Based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme IDs 67.A-0597(A) and 70.B-0440(A). |