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منيرة مقرن عبدالعزيز المقرن

Professor

عضو هيئه تدريس

كليات العلوم
الدور 3 مبنى 5
المنشورات
مقال فى مجلة
2020

• H–He collision-induced satellite in the Lyman-α profile of DBA white dwarf stars

Hubeny, NF Allard, JF Kielkopf, S Xu, G Guillon, B Mehnen, Roberto Linguerri, Muneerah Mogren Al Mogren, Majdi Hochlaf, Ivan . 2020

writing

The spectra of helium-dominated white dwarf stars with hydrogen in their atmosphere present a distinctive broad feature centered around 1160 Å in the blue wing of the Lyman-α line. It is extremely apparent in WD 1425+540 recently observed with HST COS. With new theoretical line profiles based on ab initio atomic interaction potentials we show that this feature is a signature of a collision-induced satellite due to an asymptotically forbidden transition. This quasi-molecular spectral satellite is crucial to understanding the asymmetrical shape of Lyman-α seen in this and other white dwarf spectra. Our previous work predicting this absorption feature was limited by molecular potentials that were not adequate to follow the atomic interactions with spectroscopic precision to the asymptotic limit of large separation. A new set of potential energy curves and electronic dipole transition moments for the lowest electronic

نوع عمل المنشور
paper
رقم المجلد
000
مجلة/صحيفة
Monthly Notices of the Royal Astronomical Society
الصفحات
1-8
مزيد من المنشورات
publications
بواسطة C Gharbi, Y Ajili, D Ben Abdallah, M Mogren Al Mogren, M Hochlaf,
2019
publications
بواسطة S Marzouk, Y Ajili, F Lique, MBEH Rhouma, MM Al Mogren, M Hochlaf
2020
publications

The spectra of helium-dominated white dwarf stars with hydrogen in their atmosphere present a distinctive broad feature centered around 1160 Å in the blue wing of the Lyman-α line. It is extremely…

بواسطة NF Allard, JF Kielkopf, S Xu, G Guillon, B Mehnen, Roberto Linguerri, Muneerah Mogren Al Mogren, Majdi Hochlaf, Ivan Hubeny
2020