Doppler confirmation of TESS planet candidate TOI1408.01: grazing transit and likely eccentric orbit

Q1 Earth and Planetary Sciences

Monthly Notices of the Royal Astronomical Society: Letters Pub Date : 2023-09-05 DOI:10.1093/mnrasl/slad127

G. Galazutdinov, R. Baluev, G. Valyavin, V. Aitov, D. Gadelshin, A. Valeev, E. Sendzikas, E. Sokov, G. Mitiani, T. Burlakova, I. Yakunin, K. Antonyuk, V. Vlasyuk, I. Romanyuk, A. Rzaev, M. Yushkin, A. Ivanova, A. Tavrov, O. Korablev

{"title":"Doppler confirmation of TESS planet candidate TOI1408.01: grazing transit and likely eccentric orbit","authors":"G. Galazutdinov, R. Baluev, G. Valyavin, V. Aitov, D. Gadelshin, A. Valeev, E. Sendzikas, E. Sokov, G. Mitiani, T. Burlakova, I. Yakunin, K. Antonyuk, V. Vlasyuk, I. Romanyuk, A. Rzaev, M. Yushkin, A. Ivanova, A. Tavrov, O. Korablev","doi":"10.1093/mnrasl/slad127","DOIUrl":null,"url":null,"abstract":"\n We report an independent Doppler confirmation of the TESS planet candidate orbiting an F-type main sequence star TOI-1408 located 140 pc away. We present a set of radial velocities obtained with a high-resolution fiber-optic spectrograph FFOREST mounted at the SAO RAS 6-m telescope (BTA-6). Our self- consistent analysis of these Doppler data and TESS photometry suggests a grazing transit such that the planet obscures its host star by only a portion of the visible disc. Because of this degeneracy, the radius of TOI-1408.01 appears ill-determined with lower limit about ∼1 RJup, significantly larger than in the current TESS solution. We also derive the planet mass of 1.69 ± 0.20 MJup and the orbital period ∼4.425 days, thus making this object a typical hot Jupiter, but with a significant orbital eccentricity of 0.259 ± 0.026. Our solution may suggest the planet is likely to experience a high tidal eccentricity migration at the stage of intense orbital rounding, or may indicate possible presence of other unseen companions in the system, yet to be detected.","PeriodicalId":18951,"journal":{"name":"Monthly Notices of the Royal Astronomical Society: Letters","volume":"90 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Monthly Notices of the Royal Astronomical Society: Letters","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1093/mnrasl/slad127","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Earth and Planetary Sciences","Score":null,"Total":0}

引用次数: 1

Abstract

We report an independent Doppler confirmation of the TESS planet candidate orbiting an F-type main sequence star TOI-1408 located 140 pc away. We present a set of radial velocities obtained with a high-resolution fiber-optic spectrograph FFOREST mounted at the SAO RAS 6-m telescope (BTA-6). Our self- consistent analysis of these Doppler data and TESS photometry suggests a grazing transit such that the planet obscures its host star by only a portion of the visible disc. Because of this degeneracy, the radius of TOI-1408.01 appears ill-determined with lower limit about ∼1 RJup, significantly larger than in the current TESS solution. We also derive the planet mass of 1.69 ± 0.20 MJup and the orbital period ∼4.425 days, thus making this object a typical hot Jupiter, but with a significant orbital eccentricity of 0.259 ± 0.026. Our solution may suggest the planet is likely to experience a high tidal eccentricity migration at the stage of intense orbital rounding, or may indicate possible presence of other unseen companions in the system, yet to be detected.

查看原文本刊更多论文

TESS候选行星TOI1408.01的多普勒确认:掠食过境和可能的偏心轨道

我们报告了一个独立的多普勒确认，TESS候选行星围绕140 pc外的f型主序星TOI-1408运行。我们展示了一组径向速度，这是由安装在SAO RAS 6米望远镜(BTA-6)上的高分辨率光纤光谱仪forest获得的。我们对这些多普勒数据和TESS光度测量的自一致分析表明，这颗行星是掠食凌日，因此只有一部分可见的圆盘遮挡了它的主星。由于这种简并，TOI-1408.01的半径似乎不确定，下限约为1 RJup，明显大于目前的TESS解。我们还得出行星质量为1.69±0.20 MJup，轨道周期为~ 4.425天，因此这颗天体是一颗典型的热木星，但轨道偏心率为0.259±0.026。我们的解决方案可能表明，这颗行星可能在剧烈的轨道旋转阶段经历了一次高潮汐离心率的迁移，或者可能表明系统中可能存在其他看不见的伴星，但尚未被发现。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Monthly Notices of the Royal Astronomical Society: Letters Earth and Planetary Sciences-Space and Planetary Science

CiteScore

8.80

自引率

0.00%

发文量

136

期刊介绍： For papers that merit urgent publication, MNRAS Letters, the online section of Monthly Notices of the Royal Astronomical Society, publishes short, topical and significant research in all fields of astronomy. Letters should be self-contained and describe the results of an original study whose rapid publication might be expected to have a significant influence on the subsequent development of research in the associated subject area. The 5-page limit must be respected. Authors are required to state their reasons for seeking publication in the form of a Letter when submitting their manuscript.