Fornax Cluster — A nearby galaxy cluster in the southern sky
RA 03h 38m 24s, Dec −35° 27′ 05″ (J2000)
The Fornax Cluster is a rich, relatively nearby cluster of galaxies approximately 62 million light-years away. Its center is dominated by the massive elliptical galaxy NGC 1399, with significant substructure including a subcluster centered on NGC 1316 (Fornax A) merging into the main cluster. The cluster spans several degrees on the sky and hosts a diverse population of galaxies—ellipticals, lenticulars, spirals, and many dwarfs.
Because of its proximity, Fornax is a key laboratory for studying galaxy evolution in cluster environments. Observations from X-ray telescopes (e.g. Chandra) reveal a hot intracluster medium that is interacting with member galaxies, stripping gas and altering their star-formation. Molecular gas studies (ALMA / Herschel) show many lower-mass galaxies with disturbed gas, implying environmental effects extend even to tightly bound gas phases. Recent spectroscopic surveys (e.g. Fornax3D) have mapped age, metallicity, and kinematic gradients in many cluster members, helping trace how the cluster assembled over time via accreted subgroups and mergers.
Sources & References
Fornax3D project (Iodice, Sarzi, et al., 2019) arXiv
Fornax Cluster entry, Wikipedia, after multiple surveys and data compilations. Wikipedia
UniverseGuide: Fornax Cluster details (RA/Dec, redshift, radial velocity) Universe Guide
“The Chandra Fornax Survey – I: The Cluster Environment” (Scharf, Zurek, Bureau et al., 2004) arXiv
“ALMA Fornax Cluster Survey I: stirring and stripping of the molecular gas in cluster galaxies” (Zabel, Davis, Peletier, et al., 2018) arXiv