Welcome to


Image Credit Header image: Artwork by Professor Lubaina Himid, CBE. Photo: @Denise Swanson

Revealing the cosmic evolution of boxy/peanut-shaped bulges

Kruk, Sandor and Erwin, Peter and Debattista, Victor P and Lintott, Chris (2022) Revealing the cosmic evolution of boxy/peanut-shaped bulges. [DataSet]


Bar-driven processes are believed to produce vertically thickened components, known as boxy/peanut-shaped bulges. Boxy/peanut bulges are found in the majority of massive disc galaxies in the local Universe, including our own. Nevertheless, their formation time and mechanism have been elusive. We investigate for the first time how the frequency of boxy/peanut bulges in barred galaxies evolves in the last 8 Gyr, using a large sample of moderately inclined barred galaxies selected from the Hubble Space Telescope COSMOS survey and from the Sloan Digital Sky Survey. We account for observational biases by matching the samples in resolution, rest-frame band, and stellar mass, and identify, based on the isophotes, boxy/peanut bulges. We find the first examples of boxy/peanut bulges in galaxies at z=0.8. In addition, in Kruk et al. 2019 we study the redshift evolution of the strong stellar mass dependence of the boxy/peanut bulges reported in nearby barred galaxies. Our observations place important constraints on the formation time of boxy/peanut bulges, and our study demonstrates what can be achieved with future large imaging surveys such as the ESA Euclid mission.

Research / Data Type: Collection - various types
Depositing User: Sabina Rafiq
Date Deposited: 18 Nov 2022 17:55
Revision: 12
URI: https://uclandata.uclan.ac.uk/id/eprint/350

Available Files

No Files to display

Related Resources

Repository Staff Only: item control page