Institutional Repository System Of Yunnan Observatories, CAS
| Magnetic Activity of TESS Objects Observed in the LAMOST Medium-resolution Spectral Survey | |
| Su, Tianhao1; Zhang, Li-yun1,2; Misra, Prabhakar3; Han, Xianming L.1,4; Wang, Yinpeng1; Li, Wenjie1; Zhu, Zhongzhong5; Pi, Qingfeng6; Lu, Hongpeng7 | |
| 发表期刊 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
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| 2025-02-01 | |
| 卷号 | 276期号:2 |
| DOI | 10.3847/1538-4365/ad97bb |
| 收录类别 | SCI |
| 摘要 | A combination of spectroscopic and photometric observations provides an excellent data sample for studying stellar chromospheric activity. We have combined LAMOST medium-resolution spectra with TESS 2 minute light curves and extracted over 530,000 spectra and 110,000 light curves from more than 40,000 stars. We have quantified the H alpha line intensity in each spectrum and found that 38,659 spectra from 7002 stars exhibited excess H alpha emission and that the intensity of stellar chromospheric activity increases with later spectral types. We also discovered that the boundary value between the saturated and unsaturated regions of chromospheric activity for different spectral type stars is around Ro = 0.1. By analyzing the TESS light curves, we identified 31,539 flare events from 4120 stars. Through these flare events, we determined that the flare-frequency proportion of stars increases with later spectral types. We have found that the power-law index of the flare-frequency distribution for F-, G-, K-, and M-type stars is around 2.0, while that for A-type stars is 1.3. Additionally, we observed that the amplitude of brightness variations caused by modulation due to starspot coverage (Reff) is positively correlated with both the flare intensity and intensity of chromospheric activity and that the chromospheric activity was generally stronger in flare stars as compared to nonflare stars. We also found that within 300 pc, the proportion of chromospherically active stars and flare stars decreases with increasing distance from the Galactic disk. Finally, we discovered six flare events from the H alpha variation and estimated their energies. |
| 资助项目 | MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12373032]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[11963002]; National Natural Science Foundation of China (NSFC)[CMSCSST-2021-B07]; China Manned Space Project; Talent Program of the Guizhou Science and Technology Cooperation Platform ZDSYS; Chinese Academy of Sciences |
| 项目资助者 | MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12373032, 11963002] ; National Natural Science Foundation of China (NSFC)[CMSCSST-2021-B07] ; China Manned Space Project[[2023]003] ; Talent Program of the Guizhou Science and Technology Cooperation Platform ZDSYS ; Chinese Academy of Sciences |
| 语种 | 英语 |
| 学科领域 | 天文学 ; 恒星与银河系 |
| 文章类型 | Article |
| 出版者 | IOP Publishing Ltd |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| ISSN | 0067-0049 |
| URL | 查看原文 |
| WOS记录号 | WOS:001397507100001 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | DIGITAL SKY SURVEY ; ACTIVITY-ROTATION RELATIONSHIP ; STAR SPECTROSCOPIC SURVEY ; K EMISSION DISTRIBUTION ; H-ALPHA EMISSION ; SOLAR-TYPE STARS ; LOW-MASS STARS ; CHROMOSPHERIC ACTIVITY ; M-DWARFS ; STELLAR-ACTIVITY |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 版本 | 出版稿 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/28000 |
| 专题 | 中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.College of Physics, Guizhou University, Guiyang 550025, People's Republic of China; [email protected]; 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China; 3.Department of Physics & Astronomy, Howard University, Washington, DC 20059, USA; 4.Dept. of Physics and Astronomy and SARA, Butler University, Indianapolis, IN 46208, USA; 5.College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, People's Republic of China; 6.School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, People's Republic of China; 7.State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Su, Tianhao,Zhang, Li-yun,Misra, Prabhakar,et al. Magnetic Activity of TESS Objects Observed in the LAMOST Medium-resolution Spectral Survey[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2025,276(2). |
| APA | Su, Tianhao.,Zhang, Li-yun.,Misra, Prabhakar.,Han, Xianming L..,Wang, Yinpeng.,...&Lu, Hongpeng.(2025).Magnetic Activity of TESS Objects Observed in the LAMOST Medium-resolution Spectral Survey.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,276(2). |
| MLA | Su, Tianhao,et al."Magnetic Activity of TESS Objects Observed in the LAMOST Medium-resolution Spectral Survey".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 276.2(2025). |
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| Magnetic Activity of（4624KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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