mors.constants
constants
Module for holding some basic constants.
All constants are defined in constants.py in CGS units unless otherwise noted.
Time
| Name |
Value |
Units |
sec |
\(1.0\) |
s |
minute |
\(60.0\) |
s |
hour |
\(3600.0\) |
s |
day |
\(86400.0\) |
s |
year |
\(3.1558 \times 10^{7}\) |
s |
Myr |
\(3.1558 \times 10^{13}\) |
s |
Gyr |
\(3.1558 \times 10^{16}\) |
s |
Distance (CGS)
| Name |
Value |
Units |
A |
\(1.0 \times 10^{-8}\) |
cm (Ångström) |
nm |
\(1.0 \times 10^{-7}\) |
cm |
micron |
\(1.0 \times 10^{-4}\) |
cm |
mm |
\(0.1\) |
cm |
cm |
\(1.0\) |
cm |
m |
\(1.0 \times 10^{3}\) |
cm |
km |
\(1.0 \times 10^{5}\) |
cm |
Rearth |
\(6.371 \times 10^{8}\) |
cm |
Rjup |
\(6.9911 \times 10^{9}\) |
cm |
Rsun |
\(6.957 \times 10^{10}\) |
cm |
AU |
\(1.496 \times 10^{13}\) |
cm |
AU_SI |
\(1.495979 \times 10^{11}\) |
m |
Mass (CGS)
| Name |
Value |
Units |
g |
\(1.0\) |
g |
kg |
\(1.0 \times 10^{3}\) |
g |
Mearth |
\(5.972 \times 10^{27}\) |
g |
Mjup |
\(1.89813 \times 10^{30}\) |
g |
Msun |
\(1.99 \times 10^{33}\) |
g |
Mproton |
\(1.6726219 \times 10^{-24}\) |
g |
Melec |
\(9.10938356 \times 10^{-28}\) |
g |
Msunyr_ |
\(\dot{M}_\odot\,\mathrm{yr}^{-1}\) |
\(\mathrm{g\,s}^{-1}\) |
Solar quantities
| Name |
Value |
Units |
Description |
LbolSun |
\(3.828 \times 10^{33}\) |
\(\mathrm{erg\,s}^{-1}\) |
Solar bolometric luminosity |
LbolSun_SI |
\(3.828 \times 10^{26}\) |
W |
Solar bolometric luminosity (SI) |
AgeSun |
\(4567.0\) |
Myr |
Solar age |
OmegaSun |
\(2.67 \times 10^{-6}\) |
\(\mathrm{rad\,s}^{-1}\) |
Solar rotation rate |
ProtSun |
\(2\pi / \Omega_\odot\) |
days |
Solar rotation period |
tauConvSun |
\(28.436\) |
days |
Solar convective turnover time (Spada et al. 2013) |
RoSun |
\(P_{\mathrm{rot},\odot} / \tau_\odot\) |
— |
Solar Rossby number |
Physical constants
| Name |
Value |
Units |
Description |
GravConstant |
\(6.674 \times 10^{-8}\) |
\(\mathrm{cm}^{3}\,\mathrm{g}^{-1}\,\mathrm{s}^{-2}\) |
Gravitational constant |
kB |
\(1.38064852 \times 10^{-16}\) |
\(\mathrm{erg\,K}^{-1}\) |
Boltzmann constant |
Pi |
\(3.14159265359\) |
— |
\(\pi\) |
h_SI |
\(6.626075540 \times 10^{-34}\) |
\(\mathrm{J\,s}\) |
Planck constant |
c_SI |
\(2.99792458 \times 10^{8}\) |
\(\mathrm{m\,s}^{-1}\) |
Speed of light |
k_SI |
\(1.38065812 \times 10^{-23}\) |
\(\mathrm{J\,K}^{-1}\) |
Boltzmann constant (SI) |