Spectral Classification; Old and Contemporary
Abstract
Beginning with a historical account of the spectral classification, its refinement through additional criteria is presented. The line strengths and ratios used in two dimensional classifications of each spectral class are described. A parallel classification scheme for metal-poor stars and the standards used for classification are presented. The extension of spectral classification beyond M to L and T and spectroscopic classification criteria relevant to these classes are described. Contemporary methods of classifications based upon different automated approaches are introduced.
Cite
@article{arxiv.1003.4002,
title = {Spectral Classification; Old and Contemporary},
author = {Sunetra Giridhar},
journal= {arXiv preprint arXiv:1003.4002},
year = {2015}
}
Comments
To be published in "Principles and Perspectives in Cosmochemistry" Lecture Notes on Kodai School on Synthesis of Elements in Stars: Ed Aruna Goswami & Eswar Reddy, Springer Verlag, 2009, 17 pages, 10 figures