Cover Image

Saved in:
Bibliographic Details
Main Authors: Peláez-Torres, A., Pozuelos, F. J., Morello, G., Dévora-Pajares, M., Barkaoui, K., Gkouvelis, L., Pallé, E., Collins, K. A., Rackham, B. V., Geraldía-González, S., Centenera-Merino, M., Varas, R., Esparza-Borges, E., Parlapani, Z., Flores, J., Aceituno, J., Amado, P. J., Burdanov, A., Calatayud-Borras, Y., Ciardi, D. R., Demory, B. -O., Gan, T., Giacalone, S., Gillon, M., Chew, Y. Gómez Maqueo, Kawauchi, K., Khandelwal, A., Korth, J., Lendl, M., de Leon, J. P., Livingston, J., Morales, N., Murgas, F., Narita, N., Ortiz, J. L., Parviainen, H., Marcano, M. Pichardo, Plauchu-Frayn, I., Queloz, D., Rapetti, D., Saito, J., Sánchez-López, A., Savel, A. B., Schwarz, R. P., Schroffenegger, U., Serra-Ricart, M., Stockdale, C., Triaud, A. H. M. J., de Wit, J., Lang, F. Zong
Format: Preprint
Published: 2026
Subjects:
Earth and Planetary Astrophysics
Online Access:https://arxiv.org/abs/2604.15816
Tags: Add Tag
No Tags, Be the first to tag this record!
Table of Contents:
  • The Transiting Exoplanet Survey Satellite (TESS) has delivered a large number of transiting planet candidates around nearby stars by identifying periodic decreases in stellar brightness. Establishing the planetary nature of these signals and determining their fundamental properties is a necessary step toward detailed studies of their internal structure, atmospheres, and formation pathways. In this work, we investigate the planetary nature of the TOI-1752 system (M1 V, $103.02\pm0.34$ pc), which hosts two TESS candidates: TOI-1752 b, a short-period object consistent with a lava-world scenario, and TOI-1752 c, a sub-Neptune-size planet candidate located in the optimistic habitable zone. We obtained ground-based multi-color photometric follow-up observations of TOI-1752, which we combined with TESS photometry to assess the nature of both signals. We performed a formal statistical validation using the TRICERATOPS framework, while independently vetting the candidates with the neural-network-based classifier WATSON-Net, which provides a machine-learning assessment of their planetary likelihood based on light-curve morphology, centroid diagnostics, and auxiliary vetting features. We validate TOI-1752 b as a bona fide planet with a radius of $1.69\pm0.07 R_{\oplus}$ and an orbital period of $0.935186^{+0.000001}_{-0.000002}$ days, and TOI-1752 c with a radius of $2.29^{+0.13}_{-0.14} R_{\oplus}$ and an orbital period of $32.7144\pm0.0004$ days. The combined analysis confirms TOI-1752 as a new planetary system, places TOI-1752 c within the optimistic habitable zone of its host star, and identifies TOI-1752 b as a promising target for atmospheric characterization, with an estimated emission spectroscopy metric (ESM) of up to $\sim8$.

Similar Items