Anomalously bright UV lines of Fe II as a probe of gas condensations in the vicinity of hot stars
(2003) In Astronomy & Astrophysics 412. p.771-776- Abstract
- Two UV lines of Fe II at 2507/2509 Å are extremely bright inspatially resolved HST/STIS spectra of dense gas condensations (the socalled Weigelt blobs) close to the central star of eta Carinae. Thelines also appear unresolved in HST/FOS spectra of the star AE And.Under normal conditions the lines should hardly be observable. Based onrecent studies of the formation of thelambdalambda2507/2509 lines as part of a radiative cycledriven by HLyalpha pumping and including stimulated emission wepropose the possibility of using them as a probe of non-homogeneities ingas condensations located outside hot, massive stars.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/130441
- author
- Johansson, Sveneric LU and Letokhov, Vladilen LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- atomic processes, line: formation, radiation mechanisms: non-thermal, stars: individual: eta Car, AE And
- in
- Astronomy & Astrophysics
- volume
- 412
- pages
- 771 - 776
- publisher
- EDP Sciences
- external identifiers
-
- wos:000187075500018
- scopus:0348156080
- ISSN
- 0004-6361
- DOI
- 10.1051/0004-6361:20031613
- language
- English
- LU publication?
- yes
- id
- ac723c93-9c3d-417f-9ba4-ef32fbac2c4d (old id 130441)
- date added to LUP
- 2016-04-01 16:28:34
- date last changed
- 2024-01-11 08:43:54
@article{ac723c93-9c3d-417f-9ba4-ef32fbac2c4d, abstract = {{Two UV lines of Fe II at 2507/2509 Å are extremely bright inspatially resolved HST/STIS spectra of dense gas condensations (the socalled Weigelt blobs) close to the central star of eta Carinae. Thelines also appear unresolved in HST/FOS spectra of the star AE And.Under normal conditions the lines should hardly be observable. Based onrecent studies of the formation of thelambdalambda2507/2509 lines as part of a radiative cycledriven by HLyalpha pumping and including stimulated emission wepropose the possibility of using them as a probe of non-homogeneities ingas condensations located outside hot, massive stars.}}, author = {{Johansson, Sveneric and Letokhov, Vladilen}}, issn = {{0004-6361}}, keywords = {{atomic processes; line: formation; radiation mechanisms: non-thermal; stars: individual: eta Car; AE And}}, language = {{eng}}, pages = {{771--776}}, publisher = {{EDP Sciences}}, series = {{Astronomy & Astrophysics}}, title = {{Anomalously bright UV lines of Fe II as a probe of gas condensations in the vicinity of hot stars}}, url = {{https://lup.lub.lu.se/search/files/4684232/624148.pdf}}, doi = {{10.1051/0004-6361:20031613}}, volume = {{412}}, year = {{2003}}, }