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Pregled bibliografske jedinice broj: 822064

Lithium, sodium, and potassium resonance lines pressure broadened by helium atoms


Robert Beuc, Gillian Peach, Mladen Movre, Berislav Horvatić
Lithium, sodium, and potassium resonance lines pressure broadened by helium atoms // X SBAC, Book of abstracts
Beograd, Srbija, 2016. str. 33-33 (predavanje, međunarodna recenzija, sažetak, znanstveni)


Naslov
Lithium, sodium, and potassium resonance lines pressure broadened by helium atoms

Autori
Robert Beuc, Gillian Peach, Mladen Movre, Berislav Horvatić

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
X SBAC, Book of abstracts / - , 2016, 33-33

Skup
X Serbian-Bulgarian astronomical conference

Mjesto i datum
Beograd, Srbija, 30.05.-03.06.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Molecular data - line: profiles - stars: brown dwarfs

Sažetak
The resonance lines of the alkali-metal atoms, broadened by collisions with helium atoms, are prominent features in the spectra of brown dwarfs. We carried out calculations of the emission and absorption spectra in the far-red and blue wings of the first resonant doublets of Li, Na, and K perturbed by He atoms, for temperatures from 500 to 3000 K. For our calculation we used carefully constructed electronic adiabatic potential energy curves and electronic transition dipole moments of Li- He, Na-He and K-He molecules. In the computation of the emission and absorption coefficients, we used the fully quantum- mechanical calculation, based on the Fourier grid Hamiltonian method. The obtained absorption and emission spectra are compared with previous theoretical calculations.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Ustanove
Institut za fiziku, Zagreb