Astronomy:Strömgren integral

Short description: Operation in mathematical calculus

In mathematics and astrophysics, the Strömgren integral, introduced by Bengt Strömgren while computing the Rosseland mean opacity, is the integral

$\frac{15}{4{\pi }^4}\underset{0}{\overset{x}{\int }}\frac{t^7{e}^{2t}}{(e^t-1{)}^3}dt.$

The Strömgren integral has applications to astrophysics.

References

• Cox, A. N. (1964). "Stellar absorption coefficients and opacities". in Adler, Lawrence H.; McLaughlin, Dean B.. Stellar Structure. Stars and Stellar Systems: Compendium of Astronomy and Astrophysics. VIII. University of Chicago Press. p. 195. ISBN 978-0-226-45969-1. https://books.google.com/books?id=ldpUAAAAYAAJ. 

• MacLeod, Allan J. (1996). "Algorithm 757: MISCFUN, a software package to compute uncommon special functions". ACM Transactions on Mathematical Software 22 (3): 288–301. doi:10.1145/232826.232846. 

• Strömgren, B. (1932). "The opacity of stellar matter and the hydrogen content of the stars". Zeitschrift für Astrophysik 4: 118–152. Bibcode: 1932ZA......4..118S. 

•        (1933). "On the Interpretation of the Hertzsprung-Russell-Diagram". Zeitschrift für Astrophysik 7: 222. Bibcode: 1933ZA......7..222S. 

External links

• "STROM". http://www.itl.nist.gov/div898/software/dataplot/refman2/auxillar/strom.htm.