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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28426
Title: JVLA 1.5 GHz Continuum Observation of CLASH Clusters. I. Radio Properties of the BCGs
Authors: Yu, Heng
TOZZI, Paolo 
van Weeren, Reinout
LIUZZO, Elisabetta Teodorina 
Giovannini, Gabriele 
Donahue, Megan
Balestra, Italo
Rosati, Piero
Aravena, Manuel
Issue Date: 2018
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 853
Issue: 2
First Page: 100
Abstract: We present high-resolution (∼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 5σ 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× {10}<SUP>23</SUP> to ∼ {10}<SUP>26</SUP> {{W}} {{Hz}}<SUP>-1</SUP> and radio spectral indices {α }<SUB>1.5</SUB><SUP>30</SUP> (defined as the slope between 1.5 and 30 GHz) distributed from ∼ -1 to -0.25 around the central value < α > =-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.
URI: http://hdl.handle.net/20.500.12386/28426
URL: https://arxiv.org/abs/1707.05336
https://iopscience.iop.org/article/10.3847/1538-4357/aaa421
ISSN: 0004-637X
DOI: 10.3847/1538-4357/aaa421
Bibcode ADS: 2018ApJ...853..100Y
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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