Cl J1449+0856: excited galaxies and multiple radio jets in the core of a mature galaxy cluster at z=2 - Observatoire de Paris Access content directly
Conference Papers Year : 2021

Cl J1449+0856: excited galaxies and multiple radio jets in the core of a mature galaxy cluster at z=2

Rosemary Coogan
  • Function : Author
Boris Kalita
  • Function : Author
Emanuele Daddi
  • Function : Author
Raphael Gobat
  • Function : Author
Veronica Strazzullo
  • Function : Author
Mark Sargent
  • Function : Author

Abstract

ClJ1449+0856, a galaxy cluster at z=2, is an exemplary case to investigate everything from galaxy evolution in dense environments, to early-time energetic feedback in clusters, and the physics of the high-redshift intra-cluster medium (ICM). Despite its early epoch, ClJ1449 has now been detected in both diffuse X-ray emission and through the thermal Sunyaev Zel'Dovich effect - the lowest mass single SZ detection to date, confirming its virialised nature. In this talk, I will summarise the picture of high-redshift galaxy and cluster evolution emerging from ClJ1449 so far, and present our latest discoveries. Having uncovered a population of highly-excited, merging, star-forming galaxies in ClJ1449, we turn our attention to the excess radio emission at 3GHz. We discover multiple faint radio-jet emission sites in the cluster core - quite unlike the picture in local galaxy clusters, where Active Galactic Nuclei (AGN) activity is confined to a single central galaxy. I will discuss the implications of this kinetic feedback for energy injection into the ICM, gas accretion, and the infrared-radio correlation in dense environments. Finally, I introduce our future goal to quantify the cold ICM in ClJ1449.
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obspm-04079777 , version 1 (24-04-2023)

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Rosemary Coogan, Boris Kalita, Emanuele Daddi, Raphael Gobat, Veronica Strazzullo, et al.. Cl J1449+0856: excited galaxies and multiple radio jets in the core of a mature galaxy cluster at z=2. Galaxy Cluster Formation II (GCF 2021), Jun 2021, Virtual conference, Germany. ⟨10.5281/zenodo.5026530⟩. ⟨obspm-04079777⟩
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