The environmental effect on galaxy evolution: Cl J1449+0856 at z = 1.99

Rosemary T. Coogan, E. Daddi, R. Gobat, M. T. Sargent

Research output: Contribution to journalArticlepeer-review


This work focuses on understanding the formation of the first massive, passive galaxies in clusters, as a first step to the development of environmental trends seen at low redshift. Cl J1449+0856 is an excellent case to study this - a galaxy cluster at redshift z=1.99 that already shows evidence of a virialised atmosphere. Here we highlight two recent results: the discovery of merger-driven star formation and highly-excited molecular gas in galaxies at the core of Cl J1449, along with the lowest-mass Sunyaev-Zel’dovich detection to date.

Original languageEnglish
Pages (from-to)170-172
Number of pages3
JournalProceedings of the International Astronomical Union
StatePublished - Mar 2020
Externally publishedYes


  • galaxies: ISM
  • galaxies: clusters: individual
  • galaxies: evolution
  • galaxies: starburst


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