That should make it clearer that we are not talking about what falls into the realm of stellar models . talk ) 21 : 36, 2 June 2008 ( UTC)
12.
Based upon observation of regular variations in chromospheric activity, it has a rotation period of days . Stellar models give an estimated mass of around 76 % of the Sun.
13.
These can always be matched to a Schwarzschild vacuum across a spherical surface, so they can be used as "'interior solutions "'in a stellar model.
14.
Stellar models indicate the primary component is similar in physical properties to the Sun, with 110 % of the Sun's mass, 96 % of the radius, and shining with almost the same luminosity.
15.
One possibility is that the chemical peculiarity may be the result of diffusion or mass loss, although stellar models show that this would normally only occur near the end of a star's hydrogen-burning lifespan.
16.
Given a surface temperature of 7, 740 Kelvin, stellar models yield a total luminosity for the star of about 17 times the Sun's radius and boasting a mass that is 1.74 that of the Sun.
17.
Stellar models show that blue loops are extremely sensitive to the chemical makeup of the star and to assumptions of the models themselves, but they are most likely for stars at the low end of the red supergiant mass range.
18.
Given this success, it may come as a nasty shock that it seems to be very difficult, mathematically speaking, to construct " rotating " stellar models in which a perfect fluid interior is matched to an asymptotically flat vacuum exterior.
19.
Although the universe is not old enough for any of the smallest red dwarfs to have reached the end of their lives, stellar models suggest they will slowly become brighter and hotter before running out of hydrogen fuel and becoming low-mass white dwarfs.
20.
Stellar models predict a temperature of 15 MK in the center of the Sun, and at the cores of supergiant stars the temperature may exceed 1 GK . As the radiation pressure scales as the fourth power of the temperature, it becomes important at these high temperatures.
