Asteroseismology is the study of stellar oscillations, which are variations in a star's brightness or radial velocity caused by acoustic waves propagating through the star's interior.

The three main types of stellar pulsation modes are radial modes, non-radial modes, and mixed modes. Radial modes involve the entire star pulsating in and out, non-radial modes involve specific regions of the star pulsating, and mixed modes have characteristics of both radial and non-radial modes.

The frequency of a stellar pulsation mode generally increases with increasing radial order, meaning that higher-order modes have higher frequencies.

The effect of stellar magnetic fields on stellar pulsations depends on the strength and configuration of the magnetic field. Strong magnetic fields can suppress pulsations, while weak magnetic fields can sometimes enhance pulsations.

Asteroseismology can be used to infer the presence and strength of stellar magnetic fields by studying the effects of magnetic fields on stellar pulsations.

Mixed modes, which have characteristics of both radial and non-radial modes, are generally more sensitive to the presence of stellar magnetic fields than pure radial or non-radial modes.

Asteroseismology can be used to study the internal structure of stars by measuring the frequencies, amplitudes, and phases of stellar pulsation modes. These measurements can be used to infer information about the star's density, temperature, and composition.

The frequency of a stellar pulsation mode generally increases with increasing degree, meaning that modes with higher degrees have higher frequencies.

The effect of stellar magnetic fields on stellar evolution depends on the strength and configuration of the magnetic field. Strong magnetic fields can slow down stellar evolution, while weak magnetic fields can sometimes speed up stellar evolution.

Asteroseismology can be used to infer the presence and strength of the Sun's magnetic field by studying the effects of magnetic fields on solar pulsations.

Mixed modes, which have characteristics of both radial and non-radial modes, are generally more sensitive to the presence of the Sun's magnetic field than pure radial or non-radial modes.

Asteroseismology can be used to study the internal structure of the Sun by measuring the frequencies, amplitudes, and phases of solar pulsation modes. These measurements can be used to infer information about the Sun's density, temperature, and composition.

The frequency of a solar pulsation mode generally increases with increasing degree, meaning that modes with higher degrees have higher frequencies.

The effect of solar magnetic fields on solar evolution depends on the strength and configuration of the magnetic field. Strong magnetic fields can slow down solar evolution, while weak magnetic fields can sometimes speed up solar evolution.

Studying stellar magnetic fields using asteroseismology is challenging because the effects of magnetic fields on stellar pulsations are often small and difficult to detect, stellar magnetic fields are highly variable and can change rapidly, and asteroseismology is not sensitive enough to detect magnetic fields in most stars.