Definition
A scatter graph of stars showing the relationship between each star’s absolute magnitude and its estimated surface temperature, or between optical and perceptual proxies for these quantities.
Absolute Magnitude and Temperature Scales
The absolute magnitude and temperature can be described as follows:
A star’s absolute magnitude is the attenuation (in factors 10−0.4) of the star Vega’s power (as received at 10 pc viewing distance [32.6 light-years]) to equal that of the star (also corrected to 10 pc). The convention that dimmer stars have higher magnitude is a historical precedent that dates from Hipparchus (c. 190 BCE–c. 120 BCE), whose system of stellar magnitudes was based on visual assessment.
A star’s surface temperature is estimated in one of three ways: by the observed color (an old way), by a comparison of two sensor outputs such as blue and violet (a newer way), or by a model prediction of the temperature of a black-body radiator with the same radiation power per...
References
Gribbin, J.: Companion to the Cosmos. Little, Brown, NY (1996)
Friedman H.: The Astronomer’s Universe: Stars, Galaxies, and Cosmos. W. W. Norton, NY (1990)
Moore, P.: Atlas of the Universe. Cambridge U. Press, NY (1998)
Pasachoff, J. M.: A Brief View of Astronomy. Saunders College Publ., NY (1986)
Ronin C. A.: The Natural History of the Universe: From the Big Bang to the End of Time. MacMillan, NY (1991)
Shapley, A. E.: Physical Properties of Galaxies from z = 2 – 4. http://arxiv.org/abs/1107.5060v2, accessed 26 Feb. 2013
Spence, P. (ed.): The Universe Revealed. Cambridge U. Press, NY (1998)
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Brill, M.H. (2015). Hertzsprung-Russell Diagram. In: Luo, R. (eds) Encyclopedia of Color Science and Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27851-8_188-2
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DOI: https://doi.org/10.1007/978-3-642-27851-8_188-2
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Hertzsprung-Russell Diagram- Published:
- 13 May 2019
DOI: https://doi.org/10.1007/978-3-642-27851-8_188-3
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Hertzsprung-Russell Diagram- Published:
- 23 July 2015
DOI: https://doi.org/10.1007/978-3-642-27851-8_188-2