高重力蓝色大振幅脉冲星 ZTF J071329.02-152125.2 的多周期性

IF 4.5 3区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Publications of the Astronomical Society of Australia Pub Date : 2024-01-23 DOI:10.1017/pasa.2024.5

Chris Koen

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引用次数: 0

摘要

本文介绍了脉动热亚矮星 ZTF J071329.02-152125.2 的新时间序列光度测量。观测到该恒星已知脉动的振幅发生了快速变化（时间尺度为数小时）。这可以归因于三个间隔很近的频率之间的跳动，但对所有可用光度测量的分析却发现了一系列不同的频率，其振幅也相差很大。此外，还发现了一个 49.66 d-1 的新频率，表明这是重力模式脉动。这颗恒星可能是一个混合 p 模式/g 模式的热亚矮脉冲星，有时会表现出非常大的振幅变化。

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Multi-periodicity in the High Gravity Blue Large Amplitude Pulsator ZTF J071329.02-152125.2

New time series photometry of the pulsating hot subdwarf star ZTF J071329.02-152125.2 is presented. Rapid (timescale of hours) changes in the amplitude of the known pulsation in the star was observed. This could be ascribed to beating between three closely spaced frequencies, but analysis of all available photometry finds a range of different frequencies, with widely different amplitudes. A new frequency of 49.66 d−1, suggestive of gravity-mode pulsation, was also discovered. The star may be a hybrid p-mode/g-mode hot subdwarf pulsator which sometimes exhibits extraordinarily large amplitude variability.

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来源期刊

Publications of the Astronomical Society of Australia 地学天文-天文与天体物理

CiteScore

5.90

自引率

9.50%

发文量

审稿时长

>12 weeks

期刊介绍： Publications of the Astronomical Society of Australia (PASA) publishes new and significant research in astronomy and astrophysics. PASA covers a wide range of topics within astronomy, including multi-wavelength observations, theoretical modelling, computational astronomy and visualisation. PASA also maintains its heritage of publishing results on southern hemisphere astronomy and on astronomy with Australian facilities. PASA publishes research papers, review papers and special series on topical issues, making use of expert international reviewers and an experienced Editorial Board. As an electronic-only journal, PASA publishes paper by paper, ensuring a rapid publication rate. There are no page charges. PASA''s Editorial Board approve a certain number of papers per year to be published Open Access without a publication fee.