vice.solar_z.epsilon_to_z_conversion¶
Convert an element’s abundance in the sun according to the definition
to a metallicity by mass \(Z_x = M_x / M_\odot\).
Signature: vice.solar_z.epsilon_to_z_conversion(epsilon, mu, Xsun = 0.73)
New in version 1.2.0.
Parameters¶
- epsilonfloat
The log-scaled number density relative to hydrogen defined above for a particular element.
- mufloat
The mean molecular weight of the element.
- Xsunfloat [default0.73]
The hydrogren mass fraction of the solar photosphere.
Returns¶
- Zsunfloat
The abundance by mass of the element \(x\) in the sun, \(M_x / M_\odot\).
Notes¶
The values returned by this function are calculated according to the following conversion, which can be derived from the definition of \(\epsilon_x\) and \(Z_x\) above:
VICE uses this function to compute the default solar composition based on internal data storing the Asplund et al. (2009) [1] photospheric measurements.
