Observations and Studies on the Transiting Systems HAT-P-36, XO-2 and WASP-76
We conducted photometric observations for transit events of three exoplanetary systems HAT-P-36, XO-2 and WASP-76 using the 1 m and 2.4 m telescopes at Yunnan Observatories and the 0.85 m telescope at National Astronomical Observatories of China. By combining the photometric data from the TESS missi...
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2025-01-01
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| author | Weilong Wang Shenghong Gu Xiaobin Wang Leilei Sun Byeong-Cheol Lee Chi-Tai Kwok Ho-Keung Hui Jiangpei Dou Yue Xiang Dongtao Cao Fukun Xu |
| author_facet | Weilong Wang Shenghong Gu Xiaobin Wang Leilei Sun Byeong-Cheol Lee Chi-Tai Kwok Ho-Keung Hui Jiangpei Dou Yue Xiang Dongtao Cao Fukun Xu |
| author_sort | Weilong Wang |
| collection | DOAJ |
| description | We conducted photometric observations for transit events of three exoplanetary systems HAT-P-36, XO-2 and WASP-76 using the 1 m and 2.4 m telescopes at Yunnan Observatories and the 0.85 m telescope at National Astronomical Observatories of China. By combining the photometric data from the TESS mission, we have performed a detailed analysis for the obtained transit light curves using the Markov chain Monte Carlo technique, and obtained precise transit midtimes for the three systems. Based on our new measurements and other available transit mid-times, we have determined more accurate orbital periods for these systems. From the analysis, we find that all of these planetary systems exhibit certain transit-timing variations (TTVs). The TTV patterns are simulated by using the constant period model, orbital decay model and apsidal precession model, but we do not obtain reasonable models to account for the TTVs. Furthermore, to assess the presence of additional planets in these systems, we have constrained the masses of perturbing planets using the root mean square (rms) values of the observed TTVs and the rms values of radial velocity residuals. The results demonstrate that, under the condition of mean motion resonances, these systems may harbor perturbing planets with masses from a few tenths to more than one hundred Earth mass. |
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| institution | DOAJ |
| issn | 1538-3881 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astronomical Journal |
| spelling | doaj-art-5cf0831cdc7348b59d54000273205c9b2025-08-20T03:18:32ZengIOP PublishingThe Astronomical Journal1538-38812025-01-01169634210.3847/1538-3881/add1deObservations and Studies on the Transiting Systems HAT-P-36, XO-2 and WASP-76Weilong Wang0Shenghong Gu1Xiaobin Wang2https://orcid.org/0000-0002-7421-0532Leilei Sun3Byeong-Cheol Lee4https://orcid.org/0000-0002-2783-0755Chi-Tai Kwok5Ho-Keung Hui6Jiangpei Dou7Yue Xiang8https://orcid.org/0000-0001-6580-9378Dongtao Cao9https://orcid.org/0000-0002-3534-1740Fukun Xu10https://orcid.org/0000-0002-8618-3551Yunnan Observatories, Chinese Academy of Sciences , Kunming 650216, People’s Republic of China ; wangxb@ynao.ac.cn; University of Chinese Academy of Sciences , Beijing 100049, People’s Republic of ChinaYunnan Observatories, Chinese Academy of Sciences , Kunming 650216, People’s Republic of China ; wangxb@ynao.ac.cn; University of Chinese Academy of Sciences , Beijing 100049, People’s Republic of China; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences , Kunming 650216, People’s Republic of ChinaYunnan Observatories, Chinese Academy of Sciences , Kunming 650216, People’s Republic of China ; wangxb@ynao.ac.cn; University of Chinese Academy of Sciences , Beijing 100049, People’s Republic of China; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences , Kunming 650216, People’s Republic of ChinaYunnan Observatories, Chinese Academy of Sciences , Kunming 650216, People’s Republic of China ; wangxb@ynao.ac.cn; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences , Kunming 650216, People’s Republic of China; International Centre of Supernovae , Yunnan Key Laboratory, Kunming 650216, People’s Republic of ChinaKorea Astronomy and Space Science Institute , 776 Daedeokdae-ro, Youseong-gu, Daejeon 34055, Republic of Korea; Korea University of Science and Technology , Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of KoreaHo Koon Nature Education cum Astronomical Centre , Sik Sik Yuen, Hong Kong, People’s Republic of ChinaHo Koon Nature Education cum Astronomical Centre , Sik Sik Yuen, Hong Kong, People’s Republic of ChinaNational Astronomical Observatories/Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences , Nanjing 210042, People’s Republic of China; Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences , Nanjing 210042, People’s Republic of ChinaYunnan Observatories, Chinese Academy of Sciences , Kunming 650216, People’s Republic of China ; wangxb@ynao.ac.cn; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences , Kunming 650216, People’s Republic of China; International Centre of Supernovae , Yunnan Key Laboratory, Kunming 650216, People’s Republic of ChinaYunnan Observatories, Chinese Academy of Sciences , Kunming 650216, People’s Republic of China ; wangxb@ynao.ac.cn; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences , Kunming 650216, People’s Republic of China; International Centre of Supernovae , Yunnan Key Laboratory, Kunming 650216, People’s Republic of ChinaYunnan Observatories, Chinese Academy of Sciences , Kunming 650216, People’s Republic of China ; wangxb@ynao.ac.cn; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences , Kunming 650216, People’s Republic of China; International Centre of Supernovae , Yunnan Key Laboratory, Kunming 650216, People’s Republic of ChinaWe conducted photometric observations for transit events of three exoplanetary systems HAT-P-36, XO-2 and WASP-76 using the 1 m and 2.4 m telescopes at Yunnan Observatories and the 0.85 m telescope at National Astronomical Observatories of China. By combining the photometric data from the TESS mission, we have performed a detailed analysis for the obtained transit light curves using the Markov chain Monte Carlo technique, and obtained precise transit midtimes for the three systems. Based on our new measurements and other available transit mid-times, we have determined more accurate orbital periods for these systems. From the analysis, we find that all of these planetary systems exhibit certain transit-timing variations (TTVs). The TTV patterns are simulated by using the constant period model, orbital decay model and apsidal precession model, but we do not obtain reasonable models to account for the TTVs. Furthermore, to assess the presence of additional planets in these systems, we have constrained the masses of perturbing planets using the root mean square (rms) values of the observed TTVs and the rms values of radial velocity residuals. The results demonstrate that, under the condition of mean motion resonances, these systems may harbor perturbing planets with masses from a few tenths to more than one hundred Earth mass.https://doi.org/10.3847/1538-3881/add1deTransitsPhotometryMarkov chain Monte CarloTransit timing variation method |
| spellingShingle | Weilong Wang Shenghong Gu Xiaobin Wang Leilei Sun Byeong-Cheol Lee Chi-Tai Kwok Ho-Keung Hui Jiangpei Dou Yue Xiang Dongtao Cao Fukun Xu Observations and Studies on the Transiting Systems HAT-P-36, XO-2 and WASP-76 The Astronomical Journal Transits Photometry Markov chain Monte Carlo Transit timing variation method |
| title | Observations and Studies on the Transiting Systems HAT-P-36, XO-2 and WASP-76 |
| title_full | Observations and Studies on the Transiting Systems HAT-P-36, XO-2 and WASP-76 |
| title_fullStr | Observations and Studies on the Transiting Systems HAT-P-36, XO-2 and WASP-76 |
| title_full_unstemmed | Observations and Studies on the Transiting Systems HAT-P-36, XO-2 and WASP-76 |
| title_short | Observations and Studies on the Transiting Systems HAT-P-36, XO-2 and WASP-76 |
| title_sort | observations and studies on the transiting systems hat p 36 xo 2 and wasp 76 |
| topic | Transits Photometry Markov chain Monte Carlo Transit timing variation method |
| url | https://doi.org/10.3847/1538-3881/add1de |
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