Differential evolution of Lyman alpha lines |
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| Authors: | M Acharya Pushpa Khare |
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| Institution: | (1) Department of Physics, College of Basic Sciences and Humanities, Orissa, University of Agriculture and Technology, 751 003 Bhubaneswar;(2) Physics Department, Utkal University, 751 004 Bhubaneswar |
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| Abstract: | We have analysed a large, homogeneous sample of Lyman alpha lines, observed at intermediate resolution, using the maximum
likelihood method. The analysis shows that the evolutionary index γ, is a function of rest equivalent width with stronger
lines evolving faster. The mean equivalent width increases with redshift. This behaviour is similar to that exhibited by the
heavy element absorption lines in the quasar spectra. |
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| Keywords: | Galaxies quasars absorption lines |
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