Jump to ContentJump to Main Navigation
Astrophysical Lasers$
Users without a subscription are not able to see the full content.

Vladilen Letokhov and Sveneric Johansson

Print publication date: 2008

Print ISBN-13: 9780199548279

Published to Oxford Scholarship Online: May 2009

DOI: 10.1093/acprof:oso/9780199548279.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2020. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 25 November 2020

Astrophysical rarefied gas/plasma

Astrophysical rarefied gas/plasma

(p.62) 5 Astrophysical rarefied gas/plasma
Astrophysical Lasers

Vladilen Letokhov

Sveneric Johansson

Oxford University Press

The ranges of gas (plasma) density, energy density, and temperature in astrophysical media are rather wide. For astrophysical lasers the most interesting media are those where significant deviations from local thermodynamic equilibrium (LTE) occur. Then, it is necessary that the collisions of particles do not dominate over radiative transitions, i.e., collisions should play a limited part in establishing steady state, which allows non-LTE in the plasma. This chapter focuses on gaseous media with low densities nearby a hot blue star (blobs, shells, etc.). Regarding density they take up an intermediate position between planetary nebulae and stellar atmospheres, and it is in these gas condensations that laser effects and even nonlinear optical effects, the subject of this book, may take place.

Keywords:   hot star, planetary nebulae, spectral emissions, gas condensation, symbiotic stars, gas density

Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .