Observational constraints on dark matter in galaxies over the last 10 billion years

Journal article

Dynamical tracers provide key measurements of galaxies' total masses, complementing other methods of determining stellar and gas masses and also providing some of the only possible constraints on their dark matter content. Until recently, the deep spectrally-resolved observations necessary for these measurements were only accessible out to relatively low redshifts. Thanks to new observatories and instruments, particularly near infrared multi-object spectrographs as well as sub-mm interferometers, galaxy dynamical masses can now be measured out to the peak epoch of cosmic star formation and even earlier epochs. Here I give an overview of dynamical mass constraints of galaxy-scale dark matter fractions from the present day out to z ∼ 3. I also discuss comparisons between measurements from different dynamical tracers, and the modeling challenges and degeneracies that complicate our interpretations of observations.

Authors: Price, SH; Genzel, R; Förster Schreiber, NM; Tacconi, LJ; Übler, H

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Cambridge University Press
• Journal: Proceedings of the International Astronomical Union More from this journal
• Volume: 20
• Issue: A32
• Pages: 405-410
• Publication date: 2024-08-01
• DOI: 10.1017/S1743921324002758
• EISSN: 1743-9221
• ISSN: 1743-9213
• Language: English
• Keywords: Cosmology; Dark matter; Billion years; Epoch (astronomy); Galaxy formation and evolution; COSMIC cancer database; Star formation; Galaxy