Sentences with phrase «age main sequence stars»
This method assumes that all Zero - Age main sequence stars of a given temperature (and, hence, mass) start at the same luminosity.
http://www.astronomynotes.com/ Not exact matches
A main sequence star gradually brightens as it ages, and Beta Pictoris would have to be about half a billion years old for it to have become as bright as it is.
As the stars evolve, they adjust to the increase in the helium - to - hydrogen ratio in their cores and gradually move away from the zero - age main sequence.
By knowing the main sequence lifespan of stars at this point, it becomes possible to estimate the age of the cluster.
Giants and supergiants of nearly the same radius and surface temperature may have evolved from main - sequence stars of different ages and masses.
We conclude that lithium - depleted exoplanet host stars were slow rotators on the zero - age main sequence (ZAMS) and argue that slow rotation results from a long lasting star - disk interaction during the PMS.
The models reproduce reasonably well the rotational behaviour of low - mass stars between 1 Myr and 8 - 10 Gyr, including pre-main sequence to zero - age main sequence spin up, prompt zero - age main sequence spin down, and early - main sequence convergence of the surface rotation rates.