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Ultracool Dwarfs

New Spectral Types L and T

By: Hugh R.A. Jones (Editor), Iain A. Steele (Editor)

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Hardcover | 11 September 2001

At a Glance

Hardcover
208 Pages

Dimensions(cm)
22.86 x 15.88 x 1.27

Hardcover

$169.00

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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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You Can Find This Book In

Non-Fiction Science Physics Applied Physics Astrophysics Astronomy, Space & Time Galaxies & Stars Cosmology & The Universe

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Paperback

Published: 7th November 2012

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Theory
Introduction: Theoretical Models of Brown Dwarfs -an ObserverÆs Perspective	p. 3
Unified Model Photospheres for Ultracool Dwarfs of Types L and T	p. 9
Alkali Metals and the Colour of Brown Dwarfs	p. 26
Formation of the Optical Spectra of L Dwarfs	p. 33
Observations
Introduction: The Coolest Dwarfs - a Brief History	p. 53
Imaging and Spectroscopy of Hot (Young) ôUltracoolö Companions	p. 56
Activity and Kinematics of M and L Dwarfs	p. 71
Infrared Spectroscopy of Brown Dwarfs: the Onset of CH₄ Absorption in L Dwarfs and the L/T Transition	p. 83
Surface Features, Rotation and Atmospheric Variability of Ultra Cool Dwarfs	p. 92
Low-Mass Stellar and Brown Dwarf Binary Systems	p. 111
The Second Guide Star Catalogue and Cool Stars	p. 119
Low-Luminosity Companions to Nearby Stars: Status of the 2MASS Data Search	p. 125
Spectral Classification
Introduction: The Spectral Types of the Ultracool Dwarfs	p. 135
The Classification of L Dwarfs	p. 139
Spectroscopy of Young Brown Dwarfs and Isolated Planetary Mass Objects	p. 153
The Classification of T Dwarfs	p. 169
L-Band Photometry and Spectroscopy of L and T Dwarfs: Exploring Infrared Spectral Typing	p. 183
Index	p. 195
Table of Contents provided by Publisher. All Rights Reserved.

Ultracool Dwarfs

New Spectral Types L and T

At a Glance

Hardcover

Shipping

How to return your order

Defective items

You Can Find This Book In

Other Editions and Formats

Paperback

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