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| DOI | 10.3847/1538-4357/AAA421 | ||||
| Año | 2018 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We present high-resolution (similar to 1 ''), 1.5 GHz continuum observations of the brightest cluster galaxies (BCGs) of 13 CLASH (Cluster Lensing And Supernova survey with Hubble) clusters at 0.18 < z < 0.69 with the Karl G. Jansky Very Large Array (JVLA). Radio emission is clearly detected and characterized for 11 BCGs, while for two of them we obtain only upper limits to their radio flux (<0.1 mJy at 5 sigma confidence level). We also consider five additional clusters whose BCG is detected in FIRST or NVSS. We find radio powers in the range from 2 x 10(23) to similar to 10(26) W Hz(-1) and radio spectral indices alpha(30)(1.5) (defined as the slope between 1.5 and 30 GHz) distributed from similar to-1 to -0.25 around the central value = -0.68. The radio emission from the BCGs is resolved in three cases (Abell 383, MACS J1931, and RX J2129), and unresolved or marginally resolved in the remaining eight cases observed with JVLA. In all the cases the BCGs are consistent with being powered by active galactic nuclei. The radio power shows a positive correlation with the BCG star formation rate, and a negative correlation with the central entropy of the surrounding intracluster medium (ICM) except in two cases (MACS J1206 and CL J1226). Finally, over the restricted range in radio power sampled by the CLASH BCGs, we observe a significant scatter between the radio power and the average mechanical power stored in the ICM cavities.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Yu, Heng | - |
Beijing Normal Univ - China
Beijing Normal University - China |
| 2 | Tozzi, Paolo | Hombre |
Beijing Normal Univ - China
Istituto Nazionale di Astrofisica - Italia Beijing Normal University - China Osservatorio Astrofisico Di Arcetri - Italia |
| 3 | van Weeren, R. J. | Hombre |
Harvard Smithsonian Ctr Astrophys - Estados Unidos
Harvard-Smithsonian Center for Astrophysics - Estados Unidos |
| 4 | Liuzzo, Elisabetta | Mujer |
INAF Ist Radioastron - Italia
Istituto Di Radioastronomia, Bologna - Italia |
| 5 | Giovannini, Gabriele | Mujer |
UNIV BOLOGNA - Italia
Alma Mater Studiorum Università di Bologna - Italia |
| 6 | Donahue, M. | Mujer |
Michigan State Univ - Estados Unidos
Michigan State University - Estados Unidos |
| 7 | Balestra, I. | Hombre |
Istituto Nazionale di Astrofisica - Italia
Osservatorio Astronomico di Trieste - Italia |
| 8 | Rosati, P. | Hombre |
Univ Ferrara - Italia
University of Ferrara - Italia |
| 9 | ARAVENA-PASTEN, MONICA | Hombre |
Universidad Diego Portales - Chile
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| Fuente |
|---|
| National Natural Science Foundation of China |
| Fundamental Research Funds for the Central Universities |
| Beijing Normal University |
| Recruitment Program of High-end Foreign Experts |
| Scientific Research Foundation of Beijing Normal University |
| Bureau of International Cooperation of the Chinese Academy of Sciences |
| Bureau of International Cooperation, Chinese Academy of Sciences |
| Recruitment Program of Global Experts |
| Agradecimiento |
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| We sincerely thank the referee Alastair Edge for his constructive suggestions and valuable comments, which greatly improved the manuscript. We thank Heidi Medlin for her help in preparing the JVLA observing runs, and Maite Beltran, Julie Hlavacek-Larrondo, Hui Shi, and Marcella Massardi for help with the radio data reduction. We thank Massimo Gaspari and Luisa Ostorero for useful discussions. We also thank the referee, Alastair Edge, for his comments and suggestions, which significantly improved the quality of the paper. This work was supported by the National Natural Science Foundation of China under grant No. 11403002, the Bureau of International Cooperation of the Chinese Academy of Sciences under grant No. GJHZ1864, the Fundamental Research Funds for the Central Universities and Scientific Research Foundation of Beijing Normal University. P.T. is supported by the Recruitment Program of High-end Foreign Experts and he gratefully acknowledges hospitality of Beijing Normal University. |
| We sincerely thank the referee Alastair Edge for his constructive suggestions and valuable comments, which greatly improved the manuscript. We thank Heidi Medlin for her help in preparing the JVLA observing runs, and Maite Beltran, Julie Hlavacek-Larrondo, Hui Shi, and Marcella Massardi for help with the radio data reduction. We thank Massimo Gaspari and Luisa Ostorero for useful discussions. We also thank the referee, Alastair Edge, for his comments and suggestions, which significantly improved the quality of the paper. This work was supported by the National Natural Science Foundation of China under grant No. 11403002, the Bureau of International Cooperation of the Chinese Academy of Sciences under grant No. GJHZ1864, the Fundamental Research Funds for the Central Universities and Scientific Research Foundation of Beijing Normal University. P.T. is supported by the Recruitment Program of High-end Foreign Experts and he gratefully acknowledges hospitality of Beijing Normal University. |