Planets around young active solar-type stars: assessing detection capabilities from a non-stabilized spectrograph
| Autor: | Stephen C. Marsden, Matthew W. Mengel, Alexis Heitzmann, Mathieu Clerte, Ian A. Waite, Robert A. Wittenmyer, C. P. Folsom, Duncan J. Wright, I. Millburn, Brett C. Addison, Pascal Petit |
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| Přispěvatelé: | Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2021 |
| Předmět: |
planets and satellites: detection
FOS: Physical sciences stars: pre-main-sequence 01 natural sciences Planet techniques: radial velocities stars: activity 0103 physical sciences planets and satellites: formation Instrumentation and Methods for Astrophysics (astro-ph.IM) 010303 astronomy & astrophysics Spectrograph Solar and Stellar Astrophysics (astro-ph.SR) stars: individual: HD 141943 Earth and Planetary Astrophysics (astro-ph.EP) Physics 010308 nuclear & particles physics Astronomy Astronomy and Astrophysics Stars Astrophysics - Solar and Stellar Astrophysics [SDU]Sciences of the Universe [physics] Space and Planetary Science Active solar Astrophysics::Earth and Planetary Astrophysics Astrophysics - Instrumentation and Methods for Astrophysics Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, 2021, 505, pp.4989-5011. ⟨10.1093/mnras/stab1586⟩ |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/stab1586 |
| Popis: | Short-orbit gas giant planet formation/evolution mechanisms are still not well understood. One promising pathway to discriminate between mechanisms is to constrain the occurrence rate of these peculiar exoplanets at the earliest stage of the system's life. However, a major limitation when studying newly born stars is stellar activity. This cocktail of phenomena triggered by fast rotation, strong magnetic fields and complex internal dynamics, especially present in very young stars, compromises our ability to detect exoplanets. In this paper, we investigated the limitations of such detections in the context of already acquired data solely using radial velocity data acquired with a non-stabilised spectrograph. We employed two strategies: Doppler Imaging and Gaussian Processes and could confidently detect Hot Jupiters with semi-amplitude of 100 $m.s^{-1}$ buried in the stellar activity. We also showed the advantages of the Gaussian Process approach in this case. This study serves as a proof of concept to identify potential candidates for follow-up observations or even discover such planets in legacy datasets available to the community. Comment: 16 pages, 13 figures, 11 pages appendix, accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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