bolometric luminosity The total energy radiated by an object at all , usually given in joules per second (identical to watts).
^ Bolometric luminosity of Sirius B calculated from L=4πR2σTeff4. (This simplifies to Ls=(Rs)^2*(Ts)^4, where Ls, Rs and Ts are Luminosity, Radius and Temperature all relative to solar values) See: Tayler, Roger John (1994).
The star has almost a third (31 +/- 2 percent) of Sol's mass, possibly 38 percent of its diameter (Pasinetti-Fracassini et al, 2001; and Johnson and Wright, 1983), and a bit more than one percent (around 0.013) of its bolometric luminosity (Bonfils ...
One measures the change in bolometric luminosity and the integral (change in relative) radial velocity over this time.
Luminosity The amount of energy radiated into space per second by a star. The bolometric luminosity is the total amount of radiation at all frequencies; sometimes luminosity is given for a specific band of frequencies (e.g. the visual band). M ...
**The visual luminosity is the energy output in the ``V'' filter. A total luminosity (``bolometric luminosity'') would encompass the energy in all parts of the electromagnetic spectrum.
A star's power output across all wavelengths is called its bolometric luminosity. Astronomers in practice also measure an object's luminosity in specific wavebands so that we can discuss an object's X-ray or visible luminosities for example.
See also: Luminosity, Distance, Earth, Solar, Star
 
|