Jump to ContentJump to Main Navigation
Cosmology's CenturyAn Inside History of Our Modern Understanding of the Universe$
Users without a subscription are not able to see the full content.

P. J. E. Peebles

Print publication date: 2020

Print ISBN-13: 9780691196022

Published to Princeton Scholarship Online: January 2021

DOI: 10.23943/princeton/9780691196022.001.0001

Show Summary Details
Page of

PRINTED FROM PRINCETON SCHOLARSHIP ONLINE (www.princeton.universitypressscholarship.com). (c) Copyright Princeton University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in PRSO for personal use.date: 26 September 2021

Subluminal Mass

Subluminal Mass

Chapter:
(p.239) Chapter Six Subluminal Mass
Source:
Cosmology's Century
Author(s):

P. J. E. Peebles

Publisher:
Princeton University Press
DOI:10.23943/princeton/9780691196022.003.0006

This chapter studies the presence of “subliminal matter.” The presence of significant mass in subluminal matter was first suggested in the 1930s by the surprisingly large velocities of galaxies in clusters of galaxies. The chapter traces the history of discovery of astronomical evidence of subluminal matter in large clusters of galaxies, in groups of a few or just two galaxies that are close enough that they seem likely to be gravitationally bound, and in individual spiral galaxies. There must be enough mass in spirals to account for the circular velocities of disk stars, and the mass rotationally supported in the disk must be large enough that gravity can form spiral arms, but this mass component cannot be so large that the spiral arms grow to destroy the observed nearly circular motions in the disk. These conditions require that most of the mass in a spiral galaxy is in a stable subluminal massive halo draped around the outskirts of the luminous parts of the galaxy.

Keywords:   subliminal matter, galaxies, clusters of galaxies, spiral galaxies, circular velocities, gravity

Princeton Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us.