Measuring the Expansion or Contraction of Galaxies
Astrophysics of Galaxies
2022-02-04 v1 Cosmology and Nongalactic Astrophysics
Abstract
Galaxies lose mass as a result of their luminosity or gaseous outflows. I calculate the resulting radial migration of stars outwards and show that it could potentially be measured with high resolution spectrographs on the next generation of large telescopes. Substantial accretion of matter in dense cosmic environments could trigger inward stellar migration that would be even more easily measurable.
Keywords
Cite
@article{arxiv.2202.00825,
title = {Measuring the Expansion or Contraction of Galaxies},
author = {Abraham Loeb},
journal= {arXiv preprint arXiv:2202.00825},
year = {2022}
}
Comments
3 pages, submitted to an AAS Journal