  Low-mass particles such as neutrinos, axions, other Nambu-Goldstone bosons
and gravitons are produced in the hot and dense interior of stars. Therefore,
astrophysical arguments constrain the properties of these particles in ways
which are often complementary to cosmological arguments and to laboratory
experiments. This review provides an update on the most important
stellar-evolution limits and discusses them in the context of other information
from cosmology and laboratory experiments.
