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ABSTRACT 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-stabilized spectrograph. We employed two strategies: Doppler Imaging and Gaussian Processes and could confidently detect hot Jupiters with a 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 data sets available to the community.
Earth and Planetary Astrophysics (astro-ph.EP), planets and satellites: detection, FOS: Physical sciences, stars: pre-main-sequence, Astrophysics - Solar and Stellar Astrophysics, [SDU]Sciences of the Universe [physics], techniques: radial velocities, stars: activity, planets and satellites: formation, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Solar and Stellar Astrophysics (astro-ph.SR), stars: individual: HD 141943, Astrophysics - Earth and Planetary Astrophysics
Earth and Planetary Astrophysics (astro-ph.EP), planets and satellites: detection, FOS: Physical sciences, stars: pre-main-sequence, Astrophysics - Solar and Stellar Astrophysics, [SDU]Sciences of the Universe [physics], techniques: radial velocities, stars: activity, planets and satellites: formation, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Solar and Stellar Astrophysics (astro-ph.SR), stars: individual: HD 141943, Astrophysics - Earth and Planetary Astrophysics
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citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 7 | |
popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |