A sub-Earth-mass planet orbiting Barnard's star: No evidence of transits in TESS photometry
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arXiv
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2024
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| author | Stefanov, A. K. Hernández, J. I. González Mascareño, A. Suárez Nari, N. Rebolo, R. Damasso, M. Castro-González, A. Osorio, M. -R. Zapatero Prieto, C. Allende Silva, A. M. Martins, C. J. A. P. |
| author_facet | Stefanov, A. K. Hernández, J. I. González Mascareño, A. Suárez Nari, N. Rebolo, R. Damasso, M. Castro-González, A. Osorio, M. -R. Zapatero Prieto, C. Allende Silva, A. M. Martins, C. J. A. P. |
| contents | A sub-Earth-mass planet orbiting Barnard's star, designated as Barnard b, has been recently announced. At almost the same time, the first photometric data of Barnard's star by the Transit Exoplanet Survey Satellite (TESS) was released in Sector 80. We explore the possibility of emergent transits of Barnard b in TESS photometry. The detrended 2 min light curve appears to be flat, with a flux root mean square of 0.411 parts per thousand. Attempts of blind and informed transit-curve model inference suggest no evidence of transiting Barnard b, or any other body. This provides a 3$σ$ upper bound of 87.9 degrees for the orbital inclination of Barnard b. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_00577 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A sub-Earth-mass planet orbiting Barnard's star: No evidence of transits in TESS photometry Stefanov, A. K. Hernández, J. I. González Mascareño, A. Suárez Nari, N. Rebolo, R. Damasso, M. Castro-González, A. Osorio, M. -R. Zapatero Prieto, C. Allende Silva, A. M. Martins, C. J. A. P. Earth and Planetary Astrophysics Solar and Stellar Astrophysics A sub-Earth-mass planet orbiting Barnard's star, designated as Barnard b, has been recently announced. At almost the same time, the first photometric data of Barnard's star by the Transit Exoplanet Survey Satellite (TESS) was released in Sector 80. We explore the possibility of emergent transits of Barnard b in TESS photometry. The detrended 2 min light curve appears to be flat, with a flux root mean square of 0.411 parts per thousand. Attempts of blind and informed transit-curve model inference suggest no evidence of transiting Barnard b, or any other body. This provides a 3$σ$ upper bound of 87.9 degrees for the orbital inclination of Barnard b. |
| title | A sub-Earth-mass planet orbiting Barnard's star: No evidence of transits in TESS photometry |
| topic | Earth and Planetary Astrophysics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2410.00577 |