The oscillation properties of the Blue Large Amplitude Pulsators (BLAPs): relative change rate of periods, excitations, and period relations
文献类型：期刊论文
| 作者 | Wu T(吴涛)1,2,3,4,5; Li Y(李焱)1,2,3,4,5 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2025-11 |
| 卷号 | 543期号:4页码:4109-4129 |
| 关键词 | asteroseismology instabilities stars: evolution stars: interiors stars: oscillations stars: variables: general |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/staf1634 |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | Blue Large Amplitude Pulsators (BLAPs) are a type of variable star that has been identified relatively recently. They are characterized by their large amplitude, high gravity, and long periods (2-75 min). Some BLAPs exhibit a rich helium abundance on their surfaces, while some of the others show rich hydrogen atmospheres. Up to date, both the mode identification and formation pathways of BLAPs remain subjects of ongoing debate. In this work, we gave an non-adiabatic pulsation analyses for low-order radial and non-radial dipole modes on a theoretical model grid to explore the characteristics of BLAPs. The effects of element diffusion and radiative levitation are not taken into account our theoretical models. This is because these processes could lead to discrepancies in surface element abundance of the sdB or BLAP stars between theoretical models and observations. Based on the theoretical model grid, our analyses revealed that the radial fundamental modes align well with various observed properties of BLAPs, including the pulsation instability, the position of the excitable models on the HR diagram, surface element compositions, period ranges, and period changes. Our theoretical models also predicted a period-gravity ($\log g$) relation with a narrow distribution, while the observations exhibit a broader range. Furthermore, our findings indicate that the excitation of pulsation in BLAPs is primarily influenced by metal abundance. The thickness of the outer rich hydrogen envelope and the ratio of helium to hydrogen on the surface almost do not affect the pulsation instability. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
| WOS关键词 | ANGULAR-MOMENTUM TRANSPORT ; VARIABLE-STARS ; DELTA-SCUTI ; CONVECTIVE BOUNDARIES ; EVOLUTIONARY STATUS ; MODULES ; MESA ; BINARIES ; MODES ; IV |
| 资助项目 | National Natural Science Foundation of China[12288102]; National Natural Science Foundation of China[2021YFA1600400/2021YFA1600402]; National Key R&D Program of China[XDB1160202]; B-type Strategic Priority Programme of the Chinese Academy of Sciences[12133011]; B-type Strategic Priority Programme of the Chinese Academy of Sciences[12273104]; NSFC of China[202401AS070045]; Yunnan Fundamental Research Projects; Youth Innovation Promotion Association of Chinese Academy of Sciences, Ten Thousand Talents Program of Yunnan for Top-notch Young Talents[202302AN360001]; International Centre of Supernovae, Yunnan Key Laboratory[CMS-CSST-2025-A14/A01]; China Manned Space Program; Chinese Academy of Sciences |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001600540200001 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | National Natural Science Foundation of China[12288102] ; National Natural Science Foundation of China[2021YFA1600400/2021YFA1600402] ; National Key R&D Program of China[XDB1160202] ; B-type Strategic Priority Programme of the Chinese Academy of Sciences[12133011, 12273104] ; NSFC of China[202401AS070045] ; Yunnan Fundamental Research Projects ; Youth Innovation Promotion Association of Chinese Academy of Sciences, Ten Thousand Talents Program of Yunnan for Top-notch Young Talents[202302AN360001] ; International Centre of Supernovae, Yunnan Key Laboratory[CMS-CSST-2025-A14/A01] ; China Manned Space Program ; Chinese Academy of Sciences |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28674]  |
| 专题 | 云南天文台_恒星物理研究组 |
| 通讯作者 | Wu T(吴涛); Li Y(李焱) |
| 作者单位 | 1.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, P. R. China 2.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, P. R. China; 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, P. R. China; 4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, P. R. China; 5.University of Chinese Academy of Sciences, Beijing 100049, P. R. China; |
| 推荐引用方式 GB/T 7714 | Wu T,Li Y. The oscillation properties of the Blue Large Amplitude Pulsators (BLAPs): relative change rate of periods, excitations, and period relations[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2025,543(4):4109-4129. |
| APA | 吴涛,&李焱.(2025).The oscillation properties of the Blue Large Amplitude Pulsators (BLAPs): relative change rate of periods, excitations, and period relations.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,543(4),4109-4129. |
| MLA | 吴涛,et al."The oscillation properties of the Blue Large Amplitude Pulsators (BLAPs): relative change rate of periods, excitations, and period relations".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 543.4(2025):4109-4129. |
入库方式： OAI收割
来源：云南天文台
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