Asteroseismology of PG 1541 + 651 and BPM 31594 with TESS
Asteroseismology of PG 1541 + 651 and BPM 31594 with TESS
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使用 TESS 对 PG 1541 和 BPM 31594 进行星震学研究
DOI：
10.1093/mnras/stac3113
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发表时间：
2022
影响因子：
4.8
通讯作者：
Lauffer, G. R.
中科院分区：
文献类型：
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作者：
Romero, Alejandra D.;da Rosa, Gabriela Oliveira;Kepler, S. O.;Bradley, Paul A.;Uzundag, Murat;Bell, Keaton J.;Hermes, J. J.;Lauffer, G. R.
我们提供了两颗已知的ZZ型Ceti恒星PG 1541 + 651和BPM 31594的TESS光度数据。在tess之前，这两个物体都只从地面设施进行了短期观测，分别探测到三个周期和一个周期。tess数据可以检测到多个周期，PG 1541 + 651有12个周期，BPM 31594有6个周期，这使我们能够进行详细的星震学研究。对于这两个天体，我们发现了一个具有代表性的星震模型，其标准恒星质量为0.61M⊙，氢包层厚度大于10−5.3M*。在傅里叶变换中检测到三重体也使我们能够估计平均旋转周期，PG 1541 + 651为~ 22小时，BPM 31594为11.6小时，这与其他ZZ Ceti恒星的报告值范围一致。
We present the photometric data from TESS for two known ZZ Ceti stars, PG 1541 + 651 and BPM 31594. BeforeTESS, both objects only had observations from short runs from ground-based facilities, with three and one period detected, respectively. TheTESSdata allowed the detection of multiple periodicities, 12 for PG 1541 + 651, and six for BPM 31594, which enables us to perform a detailed asteroseismological study. For both objects, we found a representative asteroseismic model with canonical stellar mass ∼0.61M⊙and thick hydrogen envelopes, thicker than 10−5.3M*. The detection of triplets in the Fourier transform also allowed us to estimate mean rotation periods, being ∼22 h for PG 1541 + 651 and 11.6 h for BPM 31594, which is consistent with a range of values reported for other ZZ Ceti stars.