Lifetime of star on main sequence

The main sequence is the stage of stellar evolution. This stage begins in stars after the protostar stage. At the beginning of the main sequence stage, the age of the star is considered to be zero. The lifetime of the star can be approximated from the mass of the star.

Notation:

1. \(M_\odot\) (M_Sun) is solar_mass.

Notes:

1. The indicator has the value of \(4.75\) for stars with mass of \(0.7\) to \(2\) solar masses, and \(4.75 m + 2.125\) for stars with mass of \(0.1\) to \(0.7\) solar masses. Here \(m\) refers to the mass of the star.

lifetime

The lifetime (time) of the star.

Symbol:

t

Latex:

\(t\)

Dimension:

time

mass

mass of the star.

Symbol:

m

Latex:

\(m\)

Dimension:

mass

indicator

A dimensionless parameter whose value depends on the mass of the star.

Symbol:

n

Latex:

\(n\)

Dimension:

dimensionless

ten_billion_years

A quantity equal to ten billion years.

Symbol:

10 Gyr

Latex:

\(10 \, \text{Gyr}\)

Dimension:

time

law

t = 10 Gyr * (m / M_Sun)^(1 - n)

Latex:

\[t = 10 \, \text{Gyr} \left(\frac{m}{M_\odot}\right)^{1 - n}\]