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Abstract:

Radio relics in galaxy clusters are believed to trace merger shock fronts. If cosmological structure formation determines the luminosity, size and shape distributions of radio relics, then merger shocks need to be lighted up in a homogeneous way. We investigate if a mock relic sample, obtained from zoomed galaxy cluster simulations, is able to match the properties of relics measured in the NRAO VLA Sky Survey (NVSS). We compile a list of all radio relics known to date and homogeneously measure their parameters in all NVSS images and apply the same procedure to relics in our simulations. Number counts in the mock relic sample increase more steeply towards lower relic flux densities, suggesting an incompleteness of NVSS in this regime. Overall, we find that NVSS and mock samples show similar properties. However, large simulated relics tend to be somewhat smaller and closer to the cluster centre than observed ones. Besides this, the mock sample reproduces very well-known correlations for radio relics, in particular those relating the radio luminosity with the largest linear size and the X-ray luminosity. We show that these correlations are largely governed by the sensitivity of the NVSS observations. Mock relics show a similar orientation with respect to the direction to the cluster centre as the NVSS sample. Moreover, we find that their maximum radio luminosity roughly correlates with cluster mass, although displaying a large scatter. The overall good agreement between NVSS and the mock sample suggests that properties of radio relics are indeed governed by merger shock fronts, emitting in a homogeneous fashion. Our study demonstrates that the combination of mock observations and data from upcoming radio surveys will allow us to shed light on both the origin of radio relics and the nature of the intracluster medium. © 2017 The Author. Published by Oxford University Press on behalf of the British Society for Antimicrobial Chemotherapy. All rights reserved.

Registro:

Documento: Artículo
Título:Can cluster merger shocks reproduce the luminosity and shape distribution of radio relics?
Autor:Nuza, S.E.; Gelszinnis, J.; Hoeft, M.; Yepes, G.
Filiación:Leibniz-Institut für Astrophysik Potsdam, An der Sternwarte 16, Potsdam, D-14482, Germany
Instituto de Astronomía y Física del Espacio (IAFE CONICET-UBA), CC 67, Suc. 28, Buenos Aires, 1428, Argentina
Facultad de Ciencias Exactas y Naturales (FCEyN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina
Thüringer Landessternwarte, Sternwarte 5, Tautenburg, D-07778, Germany
Grupo de Astrofísica, Universidad Autónoma de Madrid, Cantoblanco, Madrid, E-28039, Spain
Palabras clave:Galaxies: clusters: general; Large-scale structure of Universe; Methods: numerical; Radiation mechanisms: non-thermal; Shock waves
Año:2017
Volumen:470
Número:1
Página de inicio:240
Página de fin:263
DOI: http://dx.doi.org/10.1093/mnras/stx1109
Título revista:Monthly Notices of the Royal Astronomical Society
Título revista abreviado:Mon. Not. R. Astron. Soc.
ISSN:00358711
CODEN:MNRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v470_n1_p240_Nuza

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Citas:

---------- APA ----------
Nuza, S.E., Gelszinnis, J., Hoeft, M. & Yepes, G. (2017) . Can cluster merger shocks reproduce the luminosity and shape distribution of radio relics?. Monthly Notices of the Royal Astronomical Society, 470(1), 240-263.
http://dx.doi.org/10.1093/mnras/stx1109
---------- CHICAGO ----------
Nuza, S.E., Gelszinnis, J., Hoeft, M., Yepes, G. "Can cluster merger shocks reproduce the luminosity and shape distribution of radio relics?" . Monthly Notices of the Royal Astronomical Society 470, no. 1 (2017) : 240-263.
http://dx.doi.org/10.1093/mnras/stx1109
---------- MLA ----------
Nuza, S.E., Gelszinnis, J., Hoeft, M., Yepes, G. "Can cluster merger shocks reproduce the luminosity and shape distribution of radio relics?" . Monthly Notices of the Royal Astronomical Society, vol. 470, no. 1, 2017, pp. 240-263.
http://dx.doi.org/10.1093/mnras/stx1109
---------- VANCOUVER ----------
Nuza, S.E., Gelszinnis, J., Hoeft, M., Yepes, G. Can cluster merger shocks reproduce the luminosity and shape distribution of radio relics?. Mon. Not. R. Astron. Soc. 2017;470(1):240-263.
http://dx.doi.org/10.1093/mnras/stx1109