Modern Cosmology and the Dark Matter Problem
This book shows how modern cosmology and astronomy have led to the need to introduce dark matter in the universe to account for mass. Some of this dark matter is in the familiar form of protons, electrons and neutrons, but most of it must have a more exotic form. The favored, but not the only, possibility is neutrinos of non-zero rest mass, pair-created in the hot big bang and surviving to the present day. After a review of modern cosmology, this book gives a detailed account of the author's recent theory in which these neutrinos decay into photons that are the main ionizing agents in hydrogen and nitrogen in the interstellar and intergalactic medium. This theory, though speculative, explains a number of rather different puzzling phenomena in astronomy and cosmology in a unified way and predicts values of various important quantities such as the mass of the decaying neutrino and the Hubble constant.
absorption angular scales assume astronomical baryonic calculation cm_2 cm_3 COBE column density components consider constraint cosmic cosmological decay line decay photons decaying neutrino theory derived determined Diffuse Ionisation discussed disk distance distribution Einstein-de Sitter model electron density emission line emitted energy equation equilibrium estimate factor ﬁeld ﬁnd ﬁrst ﬂuctuations Galactic halo galactic plane gravitational Hubble constant hydrogen intergalactic ionising interstellar medium ionising ﬂux ionising photons line of sight lower limit Lyman a clouds mass microwave background neutrino decay theory neutrino types number density observed obtained opacity opaque regions optical Ostriker particle particle horizon primordial nucleosynthesis proﬁle proximity effect pulsar quasar quasar ﬂux radiation range ratio recent recombination red shift reionisation relativistic result Reynolds Robertson-Walker metric rotation curve satisﬁed scale height Sciama sec_1 signiﬁcant spectrum spiral galaxies stars supernovae temperature universe upper limit velocity x-ray