|
Interesting Conclusions Extracted from the Luminosity Function of the Preceding Two Figures* |
| 1. Stars with Mv ~ +14 are the most common stars in the Galaxy. |
| 2. Stars with Mv ~ 0 contribute the most light to the sky. |
|
3. Stars with Mv
~ +5 to +6 (slightly cooler than the sun) and stars with Mv
~ +10 to +12 contribute the most mass to the Galaxy (bimodal distribution). |
|
4. Both giant and
white dwarf sequences, as well as the main sequence, are clearly
discernible on "Luminosity
Function Versus Stellar Classification." |
|
5. Taking
Mv,¤
= 4.79 and Mbol,¤
= 4.72 leads to the conclusions that (a) 3.86% of all stars are brighter
than the sun. Such stars account for (b) 92.3% of galactic V luminosity, (c) 95.5% of galactic bolometric luminosity and (d) 18.2% of galactic luminous stellar mass. |
|
6. (a) With
respect to φ(Mv)
the median value of
Mv
is 13.55, (b) with respect to Ev (Mv)
the median value of
Mv
is 1.12, (b) with respect to Ebol (Mv) the median value of Mv is - 0.37, (b) with respect to Md (Mv) the median value of Mv is 9.28. |
| 7. The total visible light emitted per unit volume is that of ~ 0.13 0th magnitude stars or one 7.93 magnitude star pc-3. |
| 8. The total mass density of luminous stars is 0.0437 M¤ pc-3 = 2.96´10-24 g cm-3 = 1.77 mH cm-3. |
|
9. We note that the
simply derived luminosity functions based on the
100 brightest stars and the
100 nearest stars yield decent results for Mv £ +13. |
|
10. A star density of 0.13 stars
pc-3 implies that the volume of space containing the "100
nearest stars" (r ~ 6.45 pc) should contain ~ 146 stars. We conclude that there is substantial incompleteness in the list of 100 nearest stars and other similar lists. |
|
*See Stellar Luminosity Function, Emission Function and Star Density and Luminosity Function Versus Stellar Classification |