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Ultracool Dwarfs: New Spectral Types L and T Softcover reprint of the original 1st ed. 2001 Edition


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Once you have looked at the night sky on a moonless night it is not hard to realise why so much of our science and religion has its roots in the stars. Yet it took until 1850 to realise that fainter stars were not necessarily further away, nor the brighter ones closer. In fact within the magnitude range observable to the naked eye it is probable that the brighter star is in fact further away. Even today the measurement of stellar distances is relatively difficult and is gener­ ally only done using dedicated telescopes. In the early years of the 20th century Hertzsprung and Russell developed a powerful classification diagram which al­ lows stars to be distinguished using a plot of their colour versus magnitude. The construction of this diagram involved the use of spectroscopy which has become the cornerstone of modern astronomy. As telescopes become more powerful, de­ tectors more sensitive and more physics is added to astrophysics, astronomical spectroscopy becomes a more powerful tool. The concern of this book is the spectral classification of stars. With a single spectrum of a star it is possible to uniquely classify an object and find its place on the Hertzsprung-Russell diagram. This spectrum is thus equivalent to having the colour and the magnitude of the object which can in turn be related to mass and other quantities.

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From the Back Cover

This book records our current understanding of the observational and theoretical properties of objects known as ultracool dwarfs. It covers the state of the art in this new field. It is split into theoretical, observational and spectral classification sections. Each subject area begins with an introduction by an eminent scientist. It covers a wide range of issues, such as the transition from L to T dwarfs, dust and alkali metal modelling, companions, activity, the deuterium test, and brown dwarf variability, and contains considerable discussion about spectral classification schemes. The articles arose from an IAU meeting and they address researchers as well as graduate students.

Product details

  • Publisher ‏ : ‎ Springer; Softcover reprint of the original 1st ed. 2001 edition (November 7, 2012)
  • Language ‏ : ‎ English
  • Paperback ‏ : ‎ 205 pages
  • ISBN-10 ‏ : ‎ 3642626823
  • ISBN-13 ‏ : ‎ 978-3642626821
  • Item Weight ‏ : ‎ 10.5 ounces
  • Dimensions ‏ : ‎ 6.1 x 0.47 x 9.25 inches

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