Data di Pubblicazione:
2012
Citazione:
Stellar temeratures by Wien's law : not so simple / D. Cenadelli, M.A.C.Potenza, M. Zeni. - In: AMERICAN JOURNAL OF PHYSICS. - ISSN 0002-9505. - 80:5(2012 Jan), pp. 391-398. [10.1119/1.3699958]
Abstract:
A star’s surface temperature is among the most important features that can be deduced from its
light. We have made measurements to see how reliably we could determine the surface
temperatures of some A to K stars using Wien’s Displacement Law. We took spectra, corrected
them for atmospheric extinction and instrumental response, found the wavelengths of their
intensity maxima, and then from Wien’s law found the surface temperatures of the observed stars.
For F to early K stars, our results agree with temperatures determined in other ways. For A and
later K stars, the agreement is poor because the spectra are appreciably different from ideal
blackbody spectra and because our equipment responds poorly to the deep red and blue
wavelengths where the spectra of these stars have their peak intensities. This paper points out
several interesting concepts in and outside the astrophysical domain that can be instructive for
undergraduate students.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
D. Cenadelli, M.A.C.Potenza, M. Zeni
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