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Abhay Pratap Yadav

Study of pulsational instabilities in models of δ Scuti pulsators discovered under the Nainital-Cape Survey

(Volume 88 - Année 2019 — Actes de colloques — 2nd Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - October 2018 - Brussels, Belgium)
DOI: 10.25518/0037-9565.8735
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Mots-clés : étoiles, oscillations, delta Scuti

Abstract

Under the Nainital-Cape Survey, eight Scuti type pulsators have been discovered with the pulsation periods in the range of several minutes to few hours. In order to understand these observed pulsational variabilities, we have performed non-adiabatic linear stability analyses of these stars having mass in the range of 1 to 3 Mʘ. Several low order pressure modes (p-modes) are found to be unstable where the pulsation pe-riods associated with these unstable modes are in good agreement with the observed periods. Particularly for HD 118660, HD 113878, HD 102480, HD 98851, and HD 25515, we demonstrate that the observed variabilities can be explained with the low order radial p-mode pulsations.

Keywords : stars, oscillations, variables, delta Scuti

Pour citer cet article

Abhay Pratap Yadav, «Study of pulsational instabilities in models of δ Scuti pulsators discovered under the Nainital-Cape Survey», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 88 - Année 2019, Actes de colloques, 2nd Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - October 2018 - Brussels, Belgium, 110-120 URL : https://popups.uliege.be/0037-9565/index.php?id=8735.

A propos de : Abhay Pratap Yadav

Government Model College Shahpura, Dindori 481990, India,  abhaypratapbhu@yahoo.com