Search for Planets in Hot Jupiter Systems with Multi-Sector
TESS Photometry. III. A Study of Ten Systems Enhanced with New
Ground-Based Photometry
G. Maciejewski1, M. Fernández2,
A. Sota2, P.J. Amado2,
J. Ohlert3,4, R. Bischoff5,
W. Stenglein5, M. Mugrauer5,
K.-U. Michel5, J. Golonka1, A. Blanco
Solsona6, E. Lapeña6, J. Molins
Freire6, A. de los Ríos Curieses6 and
J.A. Temprano Sicilia6
1Institute of Astronomy, Faculty of Physics, Astronomy and Informatics,
Nicolaus Copernicus University in Toruń, Grudziądzka 5, 87-100 Toruń, Poland, 2Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía 3, 18008 Granada, Spain 3Michael Adrian Observatorium, Astronomie Stiftung Trebur, 65428 Trebur, Germany 4University of Applied Sciences, Technische Hochschule Mittelhessen, 61169 Friedberg, Germany 5Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2, 07745 Jena, Germany 6Valencia International University, 46002 Valencia, Spain
Received: May 15, 2023
ABSTRACT
The loneliness of hot Jupiters supports the high-eccentricity
migration as a primary path leading to the formation of systems with
those planets stripped of any close-in planetary companions. Here we
present the null results of searches for low-mass planets close to hot
Jupiters in 10 planetary systems: HAT-P-4, HAT-P-10, HAT-P-12, HAT-P-17,
HAT-P-19, HAT-P-32, HAT-P-44, Qatar-6, TrES-4, and WASP-48. We employed
multi-sector time-series photometry from the Transiting Exoplanet Survey
Satellite enhanced with new ground-based transit light curves to
determine the sizes of hypothetical planets that might still avoid being
detected. We redetermined transit parameters for the known hot Jupiters
using a homogeneous approach. We refuted transit timing variations for
HAT-P-12 b, claimed recently in the literature. The transit timing data
permitted us to place tighter constraints on third bodies in HAT-P-19 and
HAT-P-32 systems detected in Doppler measurements. We also study four
multi-periodic pulsating variable stars in the field around
HAT-P-17.