We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
from Part IV - Moderate unorthodoxies: The CMB with the Big Bang
Published online by Cambridge University Press: 09 July 2024
Sir Martin Reese’s second model of 1978 was another Population III (pre-galactic stellar) explanation but with the motivation of deriving the photon-to-baryon ratio from known astrophysical processes. As the chapter explains, this motivation was interconnected with concerns about fine-tuning physical constants and cosmological parameters to enable a habitable universe. The non-primordial origin of the CMB Reese worked out with Bernard J. Carr was driven by adherence to the simplicity of a hypothesis. He expressed sympathy with Paul Dirac’s hypothesis of large number of coincidences that established relations between the age of the universe and atomic units, the gravitational constant and cosmic time, and the number of nucleons and cosmic time in terms of large dimensionless numbers. Dirac turned his initial hypothesis into a full-fledged but unusual and intriguing variant of the Big Bang model. The chapter presents some discussions of the model with respect to the precision of the measurements of the CMB.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.
