Planets around young active solar-type stars: assessing detection capabilities from a non-stabilized spectrograph

Heitzmann, A. and Marsden, S. C. ORCID: https://orcid.org/0000-0001-5522-8887 and Petit, P. and Mengel, M. W. ORCID: https://orcid.org/0000-0002-7830-6822 and Wright, D. ORCID: https://orcid.org/0000-0001-7294-5386 and Clerte, M. and Millburn, I. and Folsom, C. P. and Addison, B. C. ORCID: https://orcid.org/0000-0003-3216-0626 and Wittenmyer, R. A. and Waite, I. A. (2021) Planets around young active solar-type stars: assessing detection capabilities from a non-stabilized spectrograph. Monthly Notices of the Royal Astronomical Society, 505 (4). pp. 4989-5011. ISSN 0035-8711


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 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.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Date Deposited: 04 Jan 2022 04:28
Last Modified: 10 Jan 2022 01:57
Uncontrolled Keywords: Planets and satellites: detection; Planets and satellites: formation; Stars: activity; Stars: individual: HD 141943; Stars: pre-main-sequence; Techniques: radial velocities
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
Identification Number or DOI: https://doi.org/10.1093/mnras/stab1586
URI: http://eprints.usq.edu.au/id/eprint/44811

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