The Transit Signal of KOI-1755 Originates from a Background Eclipsing Binary Star-Extracting the Light Curve of a Faint Background Star from Kepler Target Pixel File Data
文献类型：期刊论文
| 作者 | Wang, Haozhi2,4; Esamdin, Ali2,4; Lv, Chenglong4; Shen, Lixian2,4; Liu, Jin-zhong2,4; Iskandar, Abdusamatjan2,4; Mahmut, Umut4; Karimov, Rivkat3; Ehgamberdiev, Shuhrat A.1,3 |
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2025-08-04 |
| 卷号 | 170期号:2页码:106 |
| ISSN号 | 0004-6256 |
| DOI | 10.3847/1538-3881/ade718 |
| 产权排序 | 1 |
| 英文摘要 | KOI-1755 (KIC 5302006) was initially identified by the Kepler mission as a candidate exoplanet host but subsequently classified as a false positive due to suspected background contamination. The target star itself exhibits intrinsic stellar pulsations, accompanied by transit-like dimming events, complicating a straightforward identification of the signal source. In this study, we carried out a detailed pixel-level reanalysis of KOI-1755 using the Kepler Target Pixel Files (TPFs) to clarify the origin of these transit-like signals. Through careful pixel-level flux modeling, centroid shift measurements, and cross-matching with the Gaia DR3 catalog, we conclusively determined that the dimming signals originate from a faint background eclipsing binary (EB), rather than KOI1755 itself. We then developed a specialized photometric method to effectively remove contamination from nearby stars, allowing us to reliably extract the EB's uncontaminated light curve directly from the TPFs data. Analysis of this extracted light curve confirmed the contaminating source to be an EB system composed of two dwarf stars with a clear eclipse period of approximately 6.14 days. Our study provides a concrete example of how background EBs can mimic planetary transit signals, highlighting the importance of detailed pixel-level analyses for correctly identifying astrophysical false positives. Furthermore, our method demonstrates significant potential for uncovering previously hidden variable-star information within archival Kepler data, thus emphasizing the continuing scientific value of mining and reanalyzing existing data sets |
| WOS关键词 | DIFFERENTIAL ROTATION ; FALSE POSITIVES ; PLANET |
| 资助项目 | MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166 |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001533772000001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/8002]  |
| 专题 | 光学天文与技术应用研究室_变星研究团组 |
| 通讯作者 | Wang, Haozhi |
| 作者单位 | 1.Natl Univ Uzbekistan, Tashkent 100052, Uzbekistan 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 3.Uzbek Acad Sci, Ulugh Beg Astron Inst, Astron Skaya 33, Tashkent 100052, Uzbekistan 4.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Haozhi,Esamdin, Ali,Lv, Chenglong,et al. The Transit Signal of KOI-1755 Originates from a Background Eclipsing Binary Star-Extracting the Light Curve of a Faint Background Star from Kepler Target Pixel File Data[J]. ASTRONOMICAL JOURNAL,2025,170(2):106. |
| APA | Wang, Haozhi.,Esamdin, Ali.,Lv, Chenglong.,Shen, Lixian.,Liu, Jin-zhong.,...&Ehgamberdiev, Shuhrat A..(2025).The Transit Signal of KOI-1755 Originates from a Background Eclipsing Binary Star-Extracting the Light Curve of a Faint Background Star from Kepler Target Pixel File Data.ASTRONOMICAL JOURNAL,170(2),106. |
| MLA | Wang, Haozhi,et al."The Transit Signal of KOI-1755 Originates from a Background Eclipsing Binary Star-Extracting the Light Curve of a Faint Background Star from Kepler Target Pixel File Data".ASTRONOMICAL JOURNAL 170.2(2025):106. |
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