Research output: Contribution to journal › Article › peer-review
Abstract—We present the measurements of masses of two exoplanets and one exoplanet candidate: the candidate we earlier confirmed in the KOI-974 system, a new TESS candidate in the TOI-1797 system, and the well-known hot Jupiter MASCARA-3b. The observations were carried out using the first prototype of the high-resolution fiber-opticspectrograph of the 6-m BTA telescope, and with the BOES spectrograph of Bohyunsan Optical Astronomy Observatory of the Korea Astronomy and Space Science Institute. The MASCARA-3b mass estimates are presented to demonstrate the performance of the new BTA spectrograph and do not differ from the measurements of other authors within the errors. The KOI-974 mass estimate upper constraint is new. Assuming a circular orbit, the exoplanet mass does not exceed 0.16 MJup. More complex orbital shapes are not visible at the radial velocity half-amplitude level of more than 20 m s−1, which classifies this exoplanet as the neptunes. Only four observations were obtained for the planetary candidate TOI-1797.01, which is insufficient for its confident classification. Meanwhile, the candidate’s radial velocity values based on these four observations rule out its stellar nature.
Original language | English |
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Pages (from-to) | 437-439 |
Number of pages | 3 |
Journal | Astrophysical Bulletin |
Volume | 75 |
Issue number | 4 |
DOIs | |
State | Published - Oct 2020 |
ID: 76573714