Temporal variations of FeII fluorescence lines in the symbiotic star AG peg
(2003) Euroconference on Symbiotic Stars Probing Stellar Evolution 303. p.109-112- Abstract
- An investigation of Fe II fluorescence by PAR (photoexcitation by accidental resonance) in AG Peg has been carried out using spectra recorded by the IUE satellite. Over 30 active pumping channels caused by PAR are observed and provide an explanation for 180 of the ultraviolet Fe II lines identified in the IUE spectra. The pumping lines are strong nebular lines originating from ionized elements, such as [Si III] lambda1892.03, N IV lambda1718.55, [O IV] lambda1401.16 in the wavelength region from 900 to 2000 Angstrom. In the first IUE spectra (1978) some of the pumping nebular lines had a broad foot at the base, but during the years 1980 to 1990 this declined and became too weak to be observed. During the same years the Fe II fluorescence... (More)
- An investigation of Fe II fluorescence by PAR (photoexcitation by accidental resonance) in AG Peg has been carried out using spectra recorded by the IUE satellite. Over 30 active pumping channels caused by PAR are observed and provide an explanation for 180 of the ultraviolet Fe II lines identified in the IUE spectra. The pumping lines are strong nebular lines originating from ionized elements, such as [Si III] lambda1892.03, N IV lambda1718.55, [O IV] lambda1401.16 in the wavelength region from 900 to 2000 Angstrom. In the first IUE spectra (1978) some of the pumping nebular lines had a broad foot at the base, but during the years 1980 to 1990 this declined and became too weak to be observed. During the same years the Fe II fluorescence lines that corresponded to channels at wavelengths remarkably different from their pumping lines vanished since those channels could only be pumped by the broad foot. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1406563
- author
- Eriksson, Mattias LU ; Johansson, Sveneric LU and Wahlgren, Glenn LU
- organization
- publishing date
- 2003
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- Symbiotic Stars Probing Stellar Evolution, ASP Conference Proceedings
- volume
- 303
- pages
- 109 - 112
- publisher
- Astronomical Society of the Pacific (ASP)
- conference name
- Euroconference on Symbiotic Stars Probing Stellar Evolution
- conference location
- Los Cancajos, Spain
- conference dates
- 2002-05-27 - 2002-05-31
- external identifiers
-
- wos:000189467000016
- ISBN
- 1-58381-152-4
- language
- English
- LU publication?
- yes
- id
- 95370634-fb5f-430e-8569-96347e1fa8d9 (old id 1406563)
- alternative location
- http://adsabs.harvard.edu/abs/2003ASPC..303..109E
- date added to LUP
- 2016-04-04 10:07:03
- date last changed
- 2020-06-16 15:04:59
@inproceedings{95370634-fb5f-430e-8569-96347e1fa8d9, abstract = {{An investigation of Fe II fluorescence by PAR (photoexcitation by accidental resonance) in AG Peg has been carried out using spectra recorded by the IUE satellite. Over 30 active pumping channels caused by PAR are observed and provide an explanation for 180 of the ultraviolet Fe II lines identified in the IUE spectra. The pumping lines are strong nebular lines originating from ionized elements, such as [Si III] lambda1892.03, N IV lambda1718.55, [O IV] lambda1401.16 in the wavelength region from 900 to 2000 Angstrom. In the first IUE spectra (1978) some of the pumping nebular lines had a broad foot at the base, but during the years 1980 to 1990 this declined and became too weak to be observed. During the same years the Fe II fluorescence lines that corresponded to channels at wavelengths remarkably different from their pumping lines vanished since those channels could only be pumped by the broad foot.}}, author = {{Eriksson, Mattias and Johansson, Sveneric and Wahlgren, Glenn}}, booktitle = {{Symbiotic Stars Probing Stellar Evolution, ASP Conference Proceedings}}, isbn = {{1-58381-152-4}}, language = {{eng}}, pages = {{109--112}}, publisher = {{Astronomical Society of the Pacific (ASP)}}, title = {{Temporal variations of FeII fluorescence lines in the symbiotic star AG peg}}, url = {{http://adsabs.harvard.edu/abs/2003ASPC..303..109E}}, volume = {{303}}, year = {{2003}}, }