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A buyer's guide to the Hubble constant
Lahav, Ofer; Lemos, Pablo; Shah, Paul
Since the expansion of the universe was first established by Edwin Hubble and Georges Lemaître about a century ago, the Hubble constant H0 which measures its rate has been of great interest to astronomers. Besides being interesting in its own right, few properties of the universe can be deduced without it. In the last decade, a signific…
Magnetic fields of M dwarfs
Kochukhov, Oleg
Magnetic fields play a fundamental role for interior and atmospheric properties of M dwarfs and greatly influence terrestrial planets orbiting in the habitable zones of these low-mass stars. Determination of the strength and topology of magnetic fields, both on stellar surfaces and throughout the extended stellar magnetospheres, is a key ingredien…
Weighing stars from birth to death: mass determination methods across the HRD
Feuillet, Diane K.; Girardi, Léo; Stassun, Keivan G. +31 more
The mass of a star is the most fundamental parameter for its structure, evolution, and final fate. It is particularly important for any kind of stellar archaeology and characterization of exoplanets. There exist a variety of methods in astronomy to estimate or determine it. In this review we present a significant number of such methods, beginning …