Radiative Cycle with Stimulated Emission from Atoms and Ions in an Astrophysical Plasma
(2003) In Physical Review Letters 90(1:11101).- Abstract
- We propose that a radiative cycle operates in atoms and ions located ina rarefied gas in the vicinity of a hot star. Besides spontaneoustransitions the cycle includes a stimulated transition in one very weakintermediate channel. This radiative bottleneck creates apopulation inversion, which for an appropriate column density results inamplification and stimulated radiation in the weak transition. Thestimulated emission opens a fast decay channel leading to a fastradiative cycle in the atom (or ion). We apply this model by explainingtwo unusually bright FeII lines at 250.7 and 250.9nm in the UV spectrumof gas blobs close to eta Carinae, one of the most massive andluminous stars in the Galaxy.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/130599
- author
- Johansson, Sveneric LU and Letokhov, Vladilen LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 90
- issue
- 1:11101
- publisher
- American Physical Society
- external identifiers
-
- wos:000180318300006
- scopus:0037428609
- pmid:12570599
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.90.011101
- language
- English
- LU publication?
- yes
- id
- 6dc03de6-4471-46a0-baa9-27a781e5c674 (old id 130599)
- date added to LUP
- 2016-04-01 11:49:25
- date last changed
- 2024-01-07 21:50:29
@article{6dc03de6-4471-46a0-baa9-27a781e5c674, abstract = {{We propose that a radiative cycle operates in atoms and ions located ina rarefied gas in the vicinity of a hot star. Besides spontaneoustransitions the cycle includes a stimulated transition in one very weakintermediate channel. This radiative bottleneck creates apopulation inversion, which for an appropriate column density results inamplification and stimulated radiation in the weak transition. Thestimulated emission opens a fast decay channel leading to a fastradiative cycle in the atom (or ion). We apply this model by explainingtwo unusually bright FeII lines at 250.7 and 250.9nm in the UV spectrumof gas blobs close to eta Carinae, one of the most massive andluminous stars in the Galaxy.}}, author = {{Johansson, Sveneric and Letokhov, Vladilen}}, issn = {{1079-7114}}, language = {{eng}}, number = {{1:11101}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{Radiative Cycle with Stimulated Emission from Atoms and Ions in an Astrophysical Plasma}}, url = {{http://dx.doi.org/10.1103/PhysRevLett.90.011101}}, doi = {{10.1103/PhysRevLett.90.011101}}, volume = {{90}}, year = {{2003}}, }