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Temperature dependence of sodium and ionized calcium resonance lines perturbed by helium
- Source :
- Journal of Physics: Conference Series, Journal of Physics: Conference Series, 548, pp.012006, 2014, the proceedings of the XXII International Conference on Spectral Line Shapes (ICSLS 2014)., ⟨10.1088/1742-6596/548/1/012006⟩
- Publication Year :
- 2014
- Publisher :
- IOP Publishing, 2014.
-
Abstract
- International audience; Traces of heavy metals in cool DZ white dwarf stars may be attributed to the accretion of circumstellar dust thought to originate from tidal disruption of rocky parent bodies. Spectra of such stars therefore provide a unique opportunity to study the composition of extrasolar planetary systems. The determination of metal abundances from stellar spectra depends on stellar atmospheric parameters and an accurate prior knowledge of the collision broadening of the line profiles by the most common constituents of the stellar atmosphere. For this purpose, we present theoretical absorption spectra of Na and Ca+ broadened by He for the conditions prevailing in cool white dwarfs.
- Subjects :
- History
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Helium
01 natural sciences
Astronomical spectroscopy
Spectral line
Education
0103 physical sciences
Astrophysics::Solar and Stellar Astrophysics
010306 general physics
010303 astronomy & astrophysics
Astrophysics::Galaxy Astrophysics
[PHYS]Physics [physics]
[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]
Chemistry
Stellar atmosphere
White dwarf
Astronomy
Planetary system
[PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]
Accretion (astrophysics)
Computer Science Applications
Stars
13. Climate action
Circumstellar dust
Atomic and molecular collisions
[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph]
Astrophysics::Earth and Planetary Astrophysics
Molecular physics
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Subjects
Details
- ISSN :
- 17426596 and 17426588
- Volume :
- 548
- Database :
- OpenAIRE
- Journal :
- Journal of Physics: Conference Series
- Accession number :
- edsair.doi.dedup.....45d913da3cfc4d6a01809d896858641a