Asteroseismic analysis of subdwarf B variable stars of KIC 10001893 and EPIC 220641886
Date Issued
2019
Author(s)
Abstract
KIC10001893 and EPIC220641886 are V1093Her type pulsating subdwarf-B stars, which were observed by the Kepler spacecraft during nominal and K2 mission respectively. The amplitude spectrum of both stars show similar characteristics that the majority of the pulsation frequencies lay in the gravity g-mode domain. While the g-mode region contains 248 frequencies, the p-mode region contains just 15, altogether indicating the hybrid nature of both stars. We used one of the seismic tools, asymptotic period spacing effectively to identify the modal degree of the majority of the modes. We could not find rotational multiplets for both stars which is likely due to pole-on orientation. We assigned dipole and quadrupole modes for KIC10001893, while for EPIC220641886 we defined modal degrees ranging from l=1 to l=12, apart from l=3 and l=11 modes, which are not seen.
Issn Identifier
0571-3285
Ads BibCode
2019BAAA...61...96U
Rights
open.access
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