WFRF:(Ishibashi R.)
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- Bautista, M A (author)
Excitation of Sr II lines in Eta Carinae
- Article/chapterEnglish2002
Publisher, publication year, extent ...
- Oxford University Press (OUP),2002
- electronicrdacarrier
Numbers
- LIBRIS-ID:oai:lup.lub.lu.se:611975a1-773e-44c5-9ec6-a24c514d2384
- https://lup.lub.lu.se/record/130366URI
- https://doi.org/10.1046/j.1365-8711.2002.05250.xDOI
Supplementary language notes
- Language:English
- Summary in:English
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Notes
- We study the nature of the peculiar [Sr II] and Sr II emission filament found in the ejecta of Eta Carinae. To this purpose we carry out abinitio calculations of radiative transition probabilities and electron impact excitation rate coefficients for Sr II. Then we build a multilevel model for the system which is used to investigate the physical condition of the filament and the nature of the observed allowed and forbidden Sr II optical emission. It is found that the observed spectrum is consistent with the lines being pumped by the continuum radiation field in a mostly neutral region with electron density near 107cm-3 . Under these conditions, the observed emission can be explained without the need for a large Sr overabundance.
Subject headings and genre
- NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
- NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
- stars: individual: Eta Carinae
- stars: abundances
- line: formation
- atomic data
- atomic processes
Added entries (persons, corporate bodies, meetings, titles ...)
- Gull, T R (author)
- Ishibashi, K (author)
- Hartman, HenrikLund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)fysi-hha (author)
- Davidson, K (author)
- Astronomi - Genomgår omorganisationInstitutionen för astronomi och teoretisk fysik - Genomgår omorganisation (creator_code:org_t)
Related titles
- In:Monthly Notices of the Royal Astronomical Society: Oxford University Press (OUP)331:4, s. 875-8791365-29660035-8711
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