This book presents the first comprehensive exploration of the state of this well studied and thus unsolved mystery of the value of the Hubble constant. Chapters covering data, systematics, independent methodologies, and theoretical explanations are authored by distinguished subject-matter experts. Tailored for scientists in the field or adjacent fields, this book provides a resource of insights and also an in-depth background sufficient for motivating future study.

Key Features:

Introduction: Written by the Nobel Laureate Adam Riess.

Measurement Techniques: Gain a profound understanding of the leading Hubble constant measurement techniques, from parallax and masers to supernovae and cosmic chronometers, dissected by leading authorities on each.

Systematic Errors: A deep dive into the complexities of data. Experts scrutinize potential sources of systematics that may contribute to the observed disagreements, offering a nuanced view of the challenges in Hubble constant determinations.

Theoretical Explanations and Progress: A review of the theoretical explanations, some that are still standing, and some that have been ruled out; all of which have led to scientific progress toward the truth.

A Comprehensive Take: This book covers every key and influential aspect to the dilemma of the Hubble tension to date and has gathered world-leading voices on each respective topic.

Autorentext

Eleonora Di Valentino is Royal Society Dorothy Hodgkin Research Fellow at the University of Sheffield. She received her Ph.D. in Theoretical Physics with a thesis in Cosmology from the University of Rome La Sapienza. She joined the Institute d'Astrophysique de Paris in Paris as Lagrange Fellow and contributed to the Planck team's work on the legacy release. She relocated to the University of Manchester in the UK with Postdoctoral Researcher position and contributed to the Dark Energy Survey collaboration. She became Addison-Wheeler Fellow at the Institute of Advanced Studies of Durham University. Her current project is focused on addressing cosmological tensions, particularly seeking theoretical solutions to the Hubble constant tension.

Dillon Brout is Assistant Professor at Boston University in the Departments of Astronomy and Physics. He received his Ph.D. in Physics and Astronomy from the University of Pennsylvania. He obtained a NASA Einstein Fellowship which he took to the Smithsonian Astrophysical Observatory and which was followed on by a postdoctoral research position at Harvard University. He has led numerous Type Ia supernova cosmology analyses which include Pantheon+, The Dark Energy Survey, and he now co-leads both the Dark Energy Spectroscopic Instrument and the Legacy Survey of Space and Time Dark Energy Science Collaboration Time Domain Working Groups. His current effort is focused on building and analyzing ever larger samples of supernovae to measure cosmic structure and expansion history.