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TOI-2266 b: a keystone super-Earth at the edge of the M dwarf radius valley

Fuente: arXiv

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Bibliographische Detailangaben
Hauptverfasser:	Parviainen, Hannu, Murgas, Felipe, Esparza-Borges, Emma, Peláez-Torres, A., Palle, Enric, Luque, Rafael, Zapatero-Osorio, M. R., Korth, Judith, Fukui, Akihiko, Narita, Norio, Collins, K. A., Béjar, V. J. S., Morello, Guiseppe, Monelli, M., Garcia, N. Abreu, Chen, Guo, Crouzet, N., de Leon, J. P., Isogai, K., Kagetani, T., Kawauchi, K., Klagyivik, P., Kodama, T., Kusakabe, N., Livingston, J. H., Meni, P., Mori, M., Nowak, G., Tamura, M., Terada, Y., Watanabe, N., Ciardi, D. R., Lund, M. B., Christiansen, J. L., Dressing, C. D., Giacalone, S., Savel, A. B., Hirsch, L., Parsons, S. G., Brown, P., Collins, K. I., Barkaoui, K., Timmermans, M., Ghachoui, M., Soubkiou, A., Benkhaldoun, Z., McDermott, S., Pritchard, T., Rowden, P., Striegel, S., Gan, T., Horne, K., Jensen, E. L. N., Schwarz, R. P., Shporer, A., Srdoc, G., Seager, S., Winn, J. N., Jenkins, J. M., Ricker, G., Vanderspek, R., Dragomir, D.
Format:	Preprint
Veröffentlicht:	2024
Schlagworte:	Earth and Planetary Astrophysics
Online-Zugang:	Acceder al recurso
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_version_	1866916101480251392
author	Parviainen, Hannu Murgas, Felipe Esparza-Borges, Emma Peláez-Torres, A. Palle, Enric Luque, Rafael Zapatero-Osorio, M. R. Korth, Judith Fukui, Akihiko Narita, Norio Collins, K. A. Béjar, V. J. S. Morello, Guiseppe Monelli, M. Garcia, N. Abreu Chen, Guo Crouzet, N. de Leon, J. P. Isogai, K. Kagetani, T. Kawauchi, K. Klagyivik, P. Kodama, T. Kusakabe, N. Livingston, J. H. Meni, P. Mori, M. Nowak, G. Tamura, M. Terada, Y. Watanabe, N. Ciardi, D. R. Lund, M. B. Christiansen, J. L. Dressing, C. D. Giacalone, S. Savel, A. B. Hirsch, L. Parsons, S. G. Brown, P. Collins, K. I. Barkaoui, K. Timmermans, M. Ghachoui, M. Soubkiou, A. Benkhaldoun, Z. McDermott, S. Pritchard, T. Rowden, P. Striegel, S. Gan, T. Horne, K. Jensen, E. L. N. Schwarz, R. P. Shporer, A. Srdoc, G. Seager, S. Winn, J. N. Jenkins, J. M. Ricker, G. Vanderspek, R. Dragomir, D.
author_facet	Parviainen, Hannu Murgas, Felipe Esparza-Borges, Emma Peláez-Torres, A. Palle, Enric Luque, Rafael Zapatero-Osorio, M. R. Korth, Judith Fukui, Akihiko Narita, Norio Collins, K. A. Béjar, V. J. S. Morello, Guiseppe Monelli, M. Garcia, N. Abreu Chen, Guo Crouzet, N. de Leon, J. P. Isogai, K. Kagetani, T. Kawauchi, K. Klagyivik, P. Kodama, T. Kusakabe, N. Livingston, J. H. Meni, P. Mori, M. Nowak, G. Tamura, M. Terada, Y. Watanabe, N. Ciardi, D. R. Lund, M. B. Christiansen, J. L. Dressing, C. D. Giacalone, S. Savel, A. B. Hirsch, L. Parsons, S. G. Brown, P. Collins, K. I. Barkaoui, K. Timmermans, M. Ghachoui, M. Soubkiou, A. Benkhaldoun, Z. McDermott, S. Pritchard, T. Rowden, P. Striegel, S. Gan, T. Horne, K. Jensen, E. L. N. Schwarz, R. P. Shporer, A. Srdoc, G. Seager, S. Winn, J. N. Jenkins, J. M. Ricker, G. Vanderspek, R. Dragomir, D.
contents	We validate the Transiting Exoplanet Survey Satellite (TESS) object of interest TOI-2266.01 (TIC 348911) as a small transiting planet (most likely a super-Earth) orbiting a faint M5 dwarf ($V=16.54$) on a 2.33~d orbit. The validation is based on an approach where multicolour transit light curves are used to robustly estimate the upper limit of the transiting object's radius. Our analysis uses SPOC-pipeline TESS light curves from Sectors 24, 25, 51, and 52, simultaneous multicolour transit photometry observed with MuSCAT2, MuSCAT3, and HiPERCAM, and additional transit photometry observed with the LCOGT telescopes. TOI-2266 b is found to be a planet with a radius of $1.54\pm\0.09\,R_\oplus$, which locates it at the edge of the transition zone between rocky planets, water-rich planets, and sub-Neptunes (the so-called M~dwarf radius valley). The planet is amenable to ground-based radial velocity mass measurement with red-sensitive spectrographs installed in large telescopes, such as MAROON-X and Keck Planet Finder (KPF), which makes it a valuable addition to a relatively small population of planets that can be used to probe the physics of the transition zone. Further, the planet's orbital period of 2.33 days places it inside a `keystone planet' wedge in the period-radius plane where competing planet formation scenarios make conflicting predictions on how the radius valley depends on the orbital period. This makes the planet also a welcome addition to the small population of planets that can be used to test small-planet formation scenarios around M~dwarfs.
format	Preprint
id	arxiv_https___arxiv_org_abs_2401_11879
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	TOI-2266 b: a keystone super-Earth at the edge of the M dwarf radius valley Parviainen, Hannu Murgas, Felipe Esparza-Borges, Emma Peláez-Torres, A. Palle, Enric Luque, Rafael Zapatero-Osorio, M. R. Korth, Judith Fukui, Akihiko Narita, Norio Collins, K. A. Béjar, V. J. S. Morello, Guiseppe Monelli, M. Garcia, N. Abreu Chen, Guo Crouzet, N. de Leon, J. P. Isogai, K. Kagetani, T. Kawauchi, K. Klagyivik, P. Kodama, T. Kusakabe, N. Livingston, J. H. Meni, P. Mori, M. Nowak, G. Tamura, M. Terada, Y. Watanabe, N. Ciardi, D. R. Lund, M. B. Christiansen, J. L. Dressing, C. D. Giacalone, S. Savel, A. B. Hirsch, L. Parsons, S. G. Brown, P. Collins, K. I. Barkaoui, K. Timmermans, M. Ghachoui, M. Soubkiou, A. Benkhaldoun, Z. McDermott, S. Pritchard, T. Rowden, P. Striegel, S. Gan, T. Horne, K. Jensen, E. L. N. Schwarz, R. P. Shporer, A. Srdoc, G. Seager, S. Winn, J. N. Jenkins, J. M. Ricker, G. Vanderspek, R. Dragomir, D. Earth and Planetary Astrophysics We validate the Transiting Exoplanet Survey Satellite (TESS) object of interest TOI-2266.01 (TIC 348911) as a small transiting planet (most likely a super-Earth) orbiting a faint M5 dwarf ($V=16.54$) on a 2.33~d orbit. The validation is based on an approach where multicolour transit light curves are used to robustly estimate the upper limit of the transiting object's radius. Our analysis uses SPOC-pipeline TESS light curves from Sectors 24, 25, 51, and 52, simultaneous multicolour transit photometry observed with MuSCAT2, MuSCAT3, and HiPERCAM, and additional transit photometry observed with the LCOGT telescopes. TOI-2266 b is found to be a planet with a radius of $1.54\pm\0.09\,R_\oplus$, which locates it at the edge of the transition zone between rocky planets, water-rich planets, and sub-Neptunes (the so-called M~dwarf radius valley). The planet is amenable to ground-based radial velocity mass measurement with red-sensitive spectrographs installed in large telescopes, such as MAROON-X and Keck Planet Finder (KPF), which makes it a valuable addition to a relatively small population of planets that can be used to probe the physics of the transition zone. Further, the planet's orbital period of 2.33 days places it inside a `keystone planet' wedge in the period-radius plane where competing planet formation scenarios make conflicting predictions on how the radius valley depends on the orbital period. This makes the planet also a welcome addition to the small population of planets that can be used to test small-planet formation scenarios around M~dwarfs.
title	TOI-2266 b: a keystone super-Earth at the edge of the M dwarf radius valley
topic	Earth and Planetary Astrophysics
url	https://arxiv.org/abs/2401.11879