Doppler confirmation of TESS planet candidate TOI-1408.01: updated analysis and fitting
Based on the Doppler observations from the FFOREST spectrograph of the 6-meter telescope (BTA) and on the photometric observations from the TESS spacecraft, we provide an updated analysis for TOI-1408, an F-type main sequence star, located 140 pc away, that hosts exoplanet TOI-1408.01. We confirm the qualitative conclusions from our initial paper: (1) a grazing transit geometry such that the planet obscures its host star by only a portion of the visible disc,(2) unreliably fitted planet radius, (3) which nonetheless has a lower bound constraint of $\sim\!1~R_{\rm Jup}$, (4) unexpectedly large planet mass of $\simeq\!1.7~M_{\rm Jup}$, and (5) significant evidence in favor of a moderately eccentric orbit with $e\simeq0.27$. This solution may suggest that the planet is likely to experience a high tidal eccentricity migration at the stage of intense orbital rounding or may indicate the possible presence of other unseen companions in the system, yet to be detected.
Authors
- A. F. Valeev (ORCID: https://orcid.org/0000-0003-3513-3527)
- G. Sh. Mitiani
- A. V. Tavrov
- K. A. Antonyuk
- V. N. Aitov (ORCID: https://orcid.org/0000-0003-4426-3243)
- Roman V. Baluev (ORCID: https://orcid.org/0000-0001-9535-3965)
- Г. А. Галазутдинов (ORCID: https://orcid.org/0000-0003-1188-6487)
- I. I. Romanyuk (ORCID: https://orcid.org/0000-0002-3439-105X)
- Oleg Korablev (ORCID: https://orcid.org/0000-0003-1115-0656)
- I. A. Yakunin (ORCID: https://orcid.org/0000-0001-7050-7294)
- Anastasiia Ivanova (ORCID: https://orcid.org/0000-0001-6151-1523)
- D. R. Gadelshin (ORCID: https://orcid.org/0000-0002-9574-4891)
- E. Sokov (ORCID: https://orcid.org/0000-0001-7573-1535)
- Е. Г. Сендзикас
- А. Х. Рзаев
- G. G. Valyavin (ORCID: https://orcid.org/0000-0002-9835-0548)
- T. E. Burlakova
- M. V. Yushkin (ORCID: https://orcid.org/0000-0002-0472-2444)
- V. V. Vlasyuk
Institutions
- Russian Academy of Sciences (RU)
- St Petersburg University (RU)
- Special Astrophysical Observatory (RU)
- Space Research Institute (RU)
- Pulkovo Observatory (RU)
- Development Agency of Serbia (RS)
- Crimean Astrophysical Observatory (UA)
Publication Details
- Published
- 2024-12-27
- DOI
- https://doi.org/10.26119/vak2024.127
- Primary Topic
- Stellar, planetary, and galactic studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00