Validation of up to seven TESS planet candidates through multi-colour transit photometry using MuSCAT2 data

The TESS mission searches for transiting exoplanets by monitoring the brightness of hundreds of thousands of stars across the entire sky. M-type planet hosts are ideal targets for this mission due to their smaller size and cooler temperatures, which makes it easier to detect smaller planets near or within their habitable zones. Additionally, M dwarfs have a smaller contrast ratio between the planet and the star, making it easier to measure the planet’s properties accurately. Here, we report the validation analysis of 13 TESS exoplanet candidates orbiting around M dwarfs. We studied the nature of these candidates through a multi-colour transit photometry transit analysis using several ground-based instruments (MuSCAT2, MuSCAT3, and LCO-SINISTRO), high-spatial resolution observations, and TESS light curves. We present the validation of five new planetary systems: TOI-1883b, TOI-2274b, TOI-2768b, TOI-4438b, and TOI-5319b, along with compelling evidence of a planetary nature for TOIs 2781b and 5486b. We also present an empirical definition for the Neptune desert boundaries. The remaining six systems could not be validated due to large true radius values overlapping with the brown dwarf regime or, alternatively, the presence of chromaticity in the MuSCAT2 light curves.

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Publication Details

Journal
Astronomy and Astrophysics
Published
2024-08-23
DOI
https://doi.org/10.1051/0004-6361/202347251
Citations
5
Primary Topic
Astronomy and Astrophysical Research
Type
article
Field-Weighted Citation Impact
2.53

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article

Validation of up to seven TESS planet candidates through multi-colour transit photometry using MuSCAT2 data

Arjun B. Savel, Noriharu Watanabe, A. Boyle, D. Cheryasov et al.
5 citations
Astronomy and Astrophysics
Astronomy and Astrophysical Research
2.53
article

Validation of up to seven TESS planet candidates through multi-colour transit photometry using MuSCAT2 data

Arjun B. Savel, Noriharu Watanabe, A. Boyle, D. Cheryasov, C. Stockdale, F. Murgas, Ramotholo Sefako, C. Ziegler, Kiyoe Kawauchi, J.E. Schlieder, Ε. Πάλλη, Y. Kawai, Steven Giacalone, Joseph D. Twicken, S. Muñoz Torres, Michael B. Lund, M. R. Zapatero Osorio, J. Orell-Miquel, Nobuhiko Kusakabe, D. Galán, R. P. Schwarz, H. Parviainen, Néstor Abreu García, Zahra Essack, J. Korth, I. Carleo, J.L. Christiansen, V. J. S. Béjar, John H. Livingston, Khalid Barkaoui, G. Ricker, Yuya Hayashi, Yuka Terada, Jerome de Leon, G. Furesz, S. G. Zheltoukhov, Kai Ikuta, Izuru Fukuda, Takanori Kodama, A. Madrigal-Aguado, A. Laza-Ramos, Motohide Tamura, David R. Ciardi, Norio Narita, Holden Gill, M. Sánchez-Benavente, E. Esparza-Borges, M. Stangret, E. J. Gonzales, Taiki Kagetani, A. Peláez-Torres, S. Geraldía-González, G. Enoc, Y. Calatayud-Borras, Paula Sosa-Guillén, Yujie Zou, P. Klagyvik, R. Luque, M. Mori, K. Isogai, Giuseppe Morello, Awashi FUKUI, Joshua N. Winn, P. Meni, Margarita M. Puig
article en
5 citations

Abstract

The TESS mission searches for transiting exoplanets by monitoring the brightness of hundreds of thousands of stars across the entire sky. M-type planet hosts are ideal targets for this mission due to their smaller size and cooler temperatures, which makes it easier to detect smaller planets near or within their habitable zones. Additionally, M dwarfs have a smaller contrast ratio between the planet and the star, making it easier to measure the planet’s properties accurately. Here, we report the validation analysis of 13 TESS exoplanet candidates orbiting around M dwarfs. We studied the nature of these candidates through a multi-colour transit photometry transit analysis using several ground-based instruments (MuSCAT2, MuSCAT3, and LCO-SINISTRO), high-spatial resolution observations, and TESS light curves. We present the validation of five new planetary systems: TOI-1883b, TOI-2274b, TOI-2768b, TOI-4438b, and TOI-5319b, along with compelling evidence of a planetary nature for TOIs 2781b and 5486b. We also present an empirical definition for the Neptune desert boundaries. The remaining six systems could not be validated due to large true radius values overlapping with the brown dwarf regime or, alternatively, the presence of chromaticity in the MuSCAT2 light curves.

Astronomy and AstrophysicsVol. 690
Ames Research Center (US), Goddard Space Flight Center (US), Ritsumeikan University (JP), University of Liège (BE), Universidad de La Laguna (ES), Universitat de València (ES), University of California, Santa Cruz (US), Lund University (SE), Lomonosov Moscow State University (RU), The Graduate University for Advanced Studies, SOKENDAI (JP), Princeton University (US), Stephen F. Austin State University (US), NASA Exoplanet Science Institute (US), University of Chicago (US), Osservatorio Astrofisico di Torino (IT), Astrobiology Center (JP), South African Radio Astronomy Observatory (ZA), Center for Astrophysics Harvard & Smithsonian (US), Centro de Astrobiología (ES), Instituto de Astrofísica de Canarias (ES), Tokyo Metropolitan Komaba High School (JP), Instituto de Astrofísica de Andalucía (ES), Osservatorio Astronomico di Padova (IT), National Astronomical Observatory of Japan (JP), Ellinbank Observatory (AU), Massachusetts Institute of Technology (US), Chalmers University of Technology (SE), University of Maryland, College Park (US), The University of Tokyo (JP), Freie Universität Berlin (DE), Search for Extraterrestrial Intelligence (US), University of California, Berkeley (US)
National Science Foundation, National Aeronautics and Space Administration, California Institute of Technology, Aarhus Universitet, Universidad de La Laguna, European Space Agency, European Commission, Swedish National Space Agency, Ministry of Science, ICT and Future Planning, Vetenskapsrådet, Ministerio de Ciencia e Innovación, Universitetet i Oslo, Háskóli Íslands, Turun Yliopisto, Stockholms Universitet, Instituto de Astrofísica de Andalucía, Instituto de Astrofísica de Canarias, Ames Research Center, Science Mission Directorate, Japan Society for the Promotion of Science, Agencia Estatal de Investigación, Core Research for Evolutional Science and Technology, Precursory Research for Embryonic Science and Technology
Openalex Percentile: Top 10%
Astronomy and Astrophysical Research
2.53
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