Discovery of a Giant Radio Halo in a Massive Merging Cluster at 𝑧 = 0.443

Journal of astrophysics and astronomy

K. S. Dwarakanath1¹  Siddharth Malu¹  Ruta Kale¹ 

[1]Raman Research Institute, Bangalore 560 080, India.$$

关键词: Galaxies: clusters: individual (MACSJ0417.5-1154);    radiation mechanisms: nonthermal.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

We have discovered a giant radio halo in the massive merging cluster MACSJ0417.5-1154. This cluster, at a redshift of 0.443, is one of the most X-ray luminous galaxy cluster in the MAssive Cluster Survey (MACS) with an X-ray luminosity in the 0.1–2.4 keV band of 2.9 × 1045 erg s-1. Recent observations from GMRT at 230 and 610 MHz have revealed a radio halo of ∼ 1.2 × 0.3 Mpc2 in extent. This halo is elongated along the North-West, similar to the morphology of the X-ray emission from Chandra. The 1400 MHz radio luminosity (𝐿r) of the halo is ∼ 2 × 1025 W Hz-1, in good agreement with the value expected from the 𝐿x - 𝐿r correlation for cluster halos.

【 授权许可】

Unknown