Mathematics
Scientific paper
Mar 1924
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1924natur.113..388s&link_type=abstract
Nature, Volume 113, Issue 2837, pp. 388-389 (1924).
Mathematics
Scientific paper
FOLLOWING the well-known treatment of the problem by Schwarzchild (1906), it has become conventional to estimate the temperature, T', of the outer atmosphere of a star as of the order T1/2¼, or about 0.85 T1, where T1 is the effective temperature of the surface (practically, the surface of the photosphere) as given by application of Stefan's law to the total energy radiation. This result presupposes that the stellar atmosphere can be treated as ``grey'', that is, as having an absorption coefficient which is the same for all wave-lengths. Milne has published (Mon. Not. R.A.S., 82, 368, 1922) an approximate mathematical discussion which indicates that when the atmospheric absorption-coefficient varies with the wave-length, the value of T' may fall as low as ½T1, or rise as high as T1. The equation upon which he bases his treatment postulates that the outflowing radiation may be taken as approximately black. For stellar reversing layers this assumption seems unjustified, in consideration of the sharply selective opacity indicated by the existence of Fraunhofer lines. The radiation is indeed deficient in the ivery wave-lengths in which the gas may be expected to absorb and radiate most strongly. That the general, as compared with the sharply selective, opacity of the upper reversing layer in the sun is negligible, is shown by the existence of the bright line flash spectrum.
No associations
LandOfFree
The Temperature of Reversing Layers of Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Temperature of Reversing Layers of Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Temperature of Reversing Layers of Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-777052