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  HD 1397b: A Transiting Warm Giant Planet Orbiting A V = 7.8 mag Subgiant Star Discovered by TESS

Brahm, R., Espinoza, N., Jordán, A., Henning, T., Sarkis, P., Jones, M. I., et al. (2019). HD 1397b: A Transiting Warm Giant Planet Orbiting A V = 7.8 mag Subgiant Star Discovered by TESS. The Astronomical Journal, 158.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-0005-D403-8 Versions-Permalink: https://hdl.handle.net/21.11116/0000-0005-D404-7
Genre: Zeitschriftenartikel

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https://ui.adsabs.harvard.edu/abs/2019AJ....158...45B (beliebiger Volltext)
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 Urheber:
Brahm, Rafael1, Autor
Espinoza, Néstor1, Autor
Jordán, Andrés1, Autor
Henning, Thomas1, Autor
Sarkis, Paula1, Autor
Jones, Matías I.1, Autor
Díaz, Matías R.1, Autor
Jenkins, James S.1, Autor
Vanzi, Leonardo1, Autor
Zapata, Abner1, Autor
Petrovich, Cristobal1, Autor
Kossakowski, Diana1, Autor
Rabus, Markus1, Autor
Rojas, Felipe1, Autor
Torres, Pascal1, Autor
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

Inhalt

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Schlagwörter: planetary systems planets and satellites: detection planets and satellites: gaseous planets Astrophysics - Earth and Planetary Astrophysics Astrophysics - Solar and Stellar Astrophysics
 Zusammenfassung: We report the discovery of a transiting planet first identified as a candidate in Sector 1 of the Transiting Exoplanet Survey Satellite (TESS), and then confirmed with precision radial velocities. HD 1397b has a mass of {M}{{P}} ={0.367}-0.023+0.022 {M}{{J}}, a radius of {R}{{P}}={1.023}-0.013+0.013 {R}{{J}}, and orbits its bright host star (V = 7.8 mag) with an orbital period of 11.5366+/- 0.0003 d on a moderately eccentric orbit (e={0.216}-0.026+0.027). With a mass of {M}\star ={1.257}-0.029+0.029 {M}ȯ , a radius of {R}\star ={2.341}-0.019+0.022 {R}ȯ , and an age of 4.46+/- 0.25 Gyr, the solar-metallicity host star has already departed from the main sequence. We find evidence in the radial velocity measurements of a secondary signal with a longer period. We attribute it to the rotational modulation of stellar activity, but a long-term radial velocity monitoring would be necessary to discard if this signal is produced by a second planet in the system. The HD 1397 system is among the brightest ones currently known to host a transiting planet, which will make it possible to perform detailed follow-up observations in order to characterize the properties of giant planets orbiting evolved stars.

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 Datum: 2019
 Publikationsstatus: Erschienen
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Titel: The Astronomical Journal
Genre der Quelle: Zeitschrift
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Seiten: - Band / Heft: 158 Artikelnummer: - Start- / Endseite: - Identifikator: -