Fig. 3 | Nature Communications

Fig. 3

From: Gravitational clustering of cosmic relic neutrinos in the Milky Way

Fig. 3

Capture rate Γ in the PTOLEMY experiment. a Standard Case refers to the scenario predicted by the standard model of cosmology, i.e., only the left(right)-handed chiral states of (anti-)neutrinos were thermally produced in the early Universe. NH (IH) stands for the normal (inverted) mass hierarchy of neutrinos. b NP Case I and II are two new physics scenarios, and in both of them the thermal history of the left(right)-handed chiral states of (anti-)neutrinos is the same as Standard Case. In NP Case I the right(left)-handed chiral states of (anti-)neutrinos were also thermally produced in the early Universe, while in NP Case II the right(left)-handed chiral states of (anti-)neutrinos are non-thermal and possess the fully-degenerate phase space distribution. The number density of the right-handed chiral states of neutrinos is taken to be 28% (52%) of that of the left-handed chiral states of neutrinos in NP Case I (II), when neutrinos began free-streaming