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doi: 10.32023/0001-5237/73.1.4

Vol. 73 (2023), No. 1

pp. 57-86

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. Ohlert^3,4, 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 Sicilia<sup>6

1</sup>Institute 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.

Key words: planetary systems - Stars: individual: 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, WASP-48, BD+30 4487, TYC 2717-453-1, Gaia DR3 11849720750852486656, Gaia DR3 1849743737517511296 - Planets and satellites: individual: HAT-P-4 b, HAT-P-10 b, HAT-P-12 b, HAT-P-17 b, HAT-P-19 b, HAT-P-32 b, HAT-P-44 b, Qatar-6 b, TrES-4 b, WASP-48 b

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