TOI-1749: An M dwarf with a Trio of Planets including a Near-resonant Pair

A. Fukui; J. Korth; J. H. Livingston; J. D. Twicken; M. R.Zapatero Osorio; J. M. Jenkins; M. Mori; F. Murgas; M. Ogihara; N. Narita; E. Pallé; K. G. Stassun; G. Nowak; D. R. Ciardi; L. Alvarez-Hernandez; V. J.S. Béjar; N. Casasayas-Barris; N. Crouzet; J. P. De Leon; E. Esparza-Borges; D. Hidalgo Soto; K. Isogai; K. Kawauchi; P. Klagyivik; T. Kodama; S. Kurita; N. Kusakabe; R. Luque; A. Madrigal-Aguado; P. Montanes Rodriguez; G. Morello; T. Nishiumi; J. Orell-Miquel; M. Oshagh; H. Parviainen; M. Sánchez-Benavente; M. Stangret; Y. Terada; N. Watanabe; G. Chen; M. Tamura; P. Bosch-Cabot; M. Bowen; K. Eastridge; L. Freour; E. Gonzales; P. Guerra; Y. Jundiyeh; T. K. Kim; L. V. Kroer; A. M. Levine; E. H. Morgan; M. Reefe; R. Tronsgaard; C. K. Wedderkopp; J. Wittrock; K. A. Collins; K. Hesse; D. W. Latham; G. R. Ricker; S. Seager; R. Vanderspek; J. Winn; E. Bachelet; M. Bowman; C. McCully; M. Daily; D. Harbeck; N. H. Volgenau

doi:10.3847/1538-3881/ac13a5

TOI-1749: An M dwarf with a Trio of Planets including a Near-resonant Pair

A. Fukui, J. Korth, J. H. Livingston, J. D. Twicken, M. R.Zapatero Osorio, J. M. Jenkins, M. Mori, F. Murgas, M. Ogihara, N. Narita, E. Pallé, K. G. Stassun, G. Nowak, D. R. Ciardi, L. Alvarez-Hernandez, V. J.S. Béjar, N. Casasayas-Barris, N. Crouzet, J. P. De Leon, E. Esparza-BorgesD. Hidalgo Soto, K. Isogai, K. Kawauchi, P. Klagyivik, T. Kodama, S. Kurita, N. Kusakabe, R. Luque, A. Madrigal-Aguado, P. Montanes Rodriguez, G. Morello, T. Nishiumi, J. Orell-Miquel, M. Oshagh, H. Parviainen, M. Sánchez-Benavente, M. Stangret, Y. Terada, N. Watanabe, G. Chen, M. Tamura, P. Bosch-Cabot, M. Bowen, K. Eastridge, L. Freour, E. Gonzales, P. Guerra, Y. Jundiyeh, T. K. Kim, L. V. Kroer, A. M. Levine, E. H. Morgan, M. Reefe, R. Tronsgaard, C. K. Wedderkopp, J. Wittrock, K. A. Collins, K. Hesse, D. W. Latham, G. R. Ricker, S. Seager, R. Vanderspek, J. Winn, E. Bachelet, M. Bowman, C. McCully, M. Daily, D. Harbeck, N. H. Volgenau

Astrophysical Sciences

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Abstract

We report the discovery of one super-Earth- (TOI-1749b) and two sub-Neptune-sized planets (TOI-1749c and TOI-1749d) transiting an early M dwarf at a distance of 100 pc, which were first identified as planetary candidates using data from the TESS photometric survey. We have followed up this system from the ground by means of multiband transit photometry, adaptive optics imaging, and low-resolution spectroscopy, from which we have validated the planetary nature of the candidates. We find that TOI-1749b, c, and d have orbital periods of 2.39, 4.49, and 9.05 days, and radii of 1.4, 2.1, and 2.5 R ⊕, respectively. We also place 95% confidence upper limits on the masses of 57, 14, and 15 M ⊕ for TOI-1749b, c, and d, respectively, from transit timing variations. The periods, sizes, and tentative masses of these planets are in line with a scenario in which all three planets initially had a hydrogen envelope on top of a rocky core, and only the envelope of the innermost planet has been stripped away by photoevaporation and/or core-powered mass-loss mechanisms. These planets are similar to other planetary trios found around M dwarfs, such as TOI-175b,c,d and TOI-270b,c,d, in the sense that the outer pair has a period ratio within 1% of 2. Such a characteristic orbital configuration, in which an additional planet is located interior to a near 2:1 period-ratio pair, is relatively rare around FGK dwarfs.

Original language	English (US)
Article number	167
Journal	Astronomical Journal
Volume	162
Issue number	4
DOIs	https://doi.org/10.3847/1538-3881/ac13a5
State	Published - Oct 2021

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-3881/ac13a5

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Fukui, A., Korth, J., Livingston, J. H., Twicken, J. D., Osorio, M. R. Z., Jenkins, J. M., Mori, M., Murgas, F., Ogihara, M., Narita, N., Pallé, E., Stassun, K. G., Nowak, G., Ciardi, D. R., Alvarez-Hernandez, L., Béjar, V. J. S., Casasayas-Barris, N., Crouzet, N., De Leon, J. P., ... Volgenau, N. H. (2021). TOI-1749: An M dwarf with a Trio of Planets including a Near-resonant Pair. Astronomical Journal, 162(4), Article 167. https://doi.org/10.3847/1538-3881/ac13a5

@article{edece1c828cc442d9d4bd7e196d9073a,

title = "TOI-1749: An M dwarf with a Trio of Planets including a Near-resonant Pair",

abstract = "We report the discovery of one super-Earth- (TOI-1749b) and two sub-Neptune-sized planets (TOI-1749c and TOI-1749d) transiting an early M dwarf at a distance of 100 pc, which were first identified as planetary candidates using data from the TESS photometric survey. We have followed up this system from the ground by means of multiband transit photometry, adaptive optics imaging, and low-resolution spectroscopy, from which we have validated the planetary nature of the candidates. We find that TOI-1749b, c, and d have orbital periods of 2.39, 4.49, and 9.05 days, and radii of 1.4, 2.1, and 2.5 R ⊕, respectively. We also place 95% confidence upper limits on the masses of 57, 14, and 15 M ⊕ for TOI-1749b, c, and d, respectively, from transit timing variations. The periods, sizes, and tentative masses of these planets are in line with a scenario in which all three planets initially had a hydrogen envelope on top of a rocky core, and only the envelope of the innermost planet has been stripped away by photoevaporation and/or core-powered mass-loss mechanisms. These planets are similar to other planetary trios found around M dwarfs, such as TOI-175b,c,d and TOI-270b,c,d, in the sense that the outer pair has a period ratio within 1% of 2. Such a characteristic orbital configuration, in which an additional planet is located interior to a near 2:1 period-ratio pair, is relatively rare around FGK dwarfs.",

author = "A. Fukui and J. Korth and Livingston, {J. H.} and Twicken, {J. D.} and Osorio, {M. R.Zapatero} and Jenkins, {J. M.} and M. Mori and F. Murgas and M. Ogihara and N. Narita and E. Pall{\'e} and Stassun, {K. G.} and G. Nowak and Ciardi, {D. R.} and L. Alvarez-Hernandez and B{\'e}jar, {V. J.S.} and N. Casasayas-Barris and N. Crouzet and {De Leon}, {J. P.} and E. Esparza-Borges and Soto, {D. Hidalgo} and K. Isogai and K. Kawauchi and P. Klagyivik and T. Kodama and S. Kurita and N. Kusakabe and R. Luque and A. Madrigal-Aguado and Rodriguez, {P. Montanes} and G. Morello and T. Nishiumi and J. Orell-Miquel and M. Oshagh and H. Parviainen and M. S{\'a}nchez-Benavente and M. Stangret and Y. Terada and N. Watanabe and G. Chen and M. Tamura and P. Bosch-Cabot and M. Bowen and K. Eastridge and L. Freour and E. Gonzales and P. Guerra and Y. Jundiyeh and Kim, {T. K.} and Kroer, {L. V.} and Levine, {A. M.} and Morgan, {E. H.} and M. Reefe and R. Tronsgaard and Wedderkopp, {C. K.} and J. Wittrock and Collins, {K. A.} and K. Hesse and Latham, {D. W.} and Ricker, {G. R.} and S. Seager and R. Vanderspek and J. Winn and E. Bachelet and M. Bowman and C. McCully and M. Daily and D. Harbeck and Volgenau, {N. H.}",

year = "2021",

month = oct,

doi = "10.3847/1538-3881/ac13a5",

language = "English (US)",

volume = "162",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "4",

}

Fukui, A, Korth, J, Livingston, JH, Twicken, JD, Osorio, MRZ, Jenkins, JM, Mori, M, Murgas, F, Ogihara, M, Narita, N, Pallé, E, Stassun, KG, Nowak, G, Ciardi, DR, Alvarez-Hernandez, L, Béjar, VJS, Casasayas-Barris, N, Crouzet, N, De Leon, JP, Esparza-Borges, E, Soto, DH, Isogai, K, Kawauchi, K, Klagyivik, P, Kodama, T, Kurita, S, Kusakabe, N, Luque, R, Madrigal-Aguado, A, Rodriguez, PM, Morello, G, Nishiumi, T, Orell-Miquel, J, Oshagh, M, Parviainen, H, Sánchez-Benavente, M, Stangret, M, Terada, Y, Watanabe, N, Chen, G, Tamura, M, Bosch-Cabot, P, Bowen, M, Eastridge, K, Freour, L, Gonzales, E, Guerra, P, Jundiyeh, Y, Kim, TK, Kroer, LV, Levine, AM, Morgan, EH, Reefe, M, Tronsgaard, R, Wedderkopp, CK, Wittrock, J, Collins, KA, Hesse, K, Latham, DW, Ricker, GR, Seager, S, Vanderspek, R, Winn, J, Bachelet, E, Bowman, M, McCully, C, Daily, M, Harbeck, D & Volgenau, NH 2021, 'TOI-1749: An M dwarf with a Trio of Planets including a Near-resonant Pair', Astronomical Journal, vol. 162, no. 4, 167. https://doi.org/10.3847/1538-3881/ac13a5

TY - JOUR

T1 - TOI-1749

T2 - An M dwarf with a Trio of Planets including a Near-resonant Pair

AU - Fukui, A.

AU - Korth, J.

AU - Livingston, J. H.

AU - Twicken, J. D.

AU - Osorio, M. R.Zapatero

AU - Jenkins, J. M.

AU - Mori, M.

AU - Murgas, F.

AU - Ogihara, M.

AU - Narita, N.

AU - Pallé, E.

AU - Stassun, K. G.

AU - Nowak, G.

AU - Ciardi, D. R.

AU - Alvarez-Hernandez, L.

AU - Béjar, V. J.S.

AU - Casasayas-Barris, N.

AU - Crouzet, N.

AU - De Leon, J. P.

AU - Esparza-Borges, E.

AU - Soto, D. Hidalgo

AU - Isogai, K.

AU - Kawauchi, K.

AU - Klagyivik, P.

AU - Kodama, T.

AU - Kurita, S.

AU - Kusakabe, N.

AU - Luque, R.

AU - Madrigal-Aguado, A.

AU - Rodriguez, P. Montanes

AU - Morello, G.

AU - Nishiumi, T.

AU - Orell-Miquel, J.

AU - Oshagh, M.

AU - Parviainen, H.

AU - Sánchez-Benavente, M.

AU - Stangret, M.

AU - Terada, Y.

AU - Watanabe, N.

AU - Chen, G.

AU - Tamura, M.

AU - Bosch-Cabot, P.

AU - Bowen, M.

AU - Eastridge, K.

AU - Freour, L.

AU - Gonzales, E.

AU - Guerra, P.

AU - Jundiyeh, Y.

AU - Kim, T. K.

AU - Kroer, L. V.

AU - Levine, A. M.

AU - Morgan, E. H.

AU - Reefe, M.

AU - Tronsgaard, R.

AU - Wedderkopp, C. K.

AU - Wittrock, J.

AU - Collins, K. A.

AU - Hesse, K.

AU - Latham, D. W.

AU - Ricker, G. R.

AU - Seager, S.

AU - Vanderspek, R.

AU - Winn, J.

AU - Bachelet, E.

AU - Bowman, M.

AU - McCully, C.

AU - Daily, M.

AU - Harbeck, D.

AU - Volgenau, N. H.

PY - 2021/10

Y1 - 2021/10

N2 - We report the discovery of one super-Earth- (TOI-1749b) and two sub-Neptune-sized planets (TOI-1749c and TOI-1749d) transiting an early M dwarf at a distance of 100 pc, which were first identified as planetary candidates using data from the TESS photometric survey. We have followed up this system from the ground by means of multiband transit photometry, adaptive optics imaging, and low-resolution spectroscopy, from which we have validated the planetary nature of the candidates. We find that TOI-1749b, c, and d have orbital periods of 2.39, 4.49, and 9.05 days, and radii of 1.4, 2.1, and 2.5 R ⊕, respectively. We also place 95% confidence upper limits on the masses of 57, 14, and 15 M ⊕ for TOI-1749b, c, and d, respectively, from transit timing variations. The periods, sizes, and tentative masses of these planets are in line with a scenario in which all three planets initially had a hydrogen envelope on top of a rocky core, and only the envelope of the innermost planet has been stripped away by photoevaporation and/or core-powered mass-loss mechanisms. These planets are similar to other planetary trios found around M dwarfs, such as TOI-175b,c,d and TOI-270b,c,d, in the sense that the outer pair has a period ratio within 1% of 2. Such a characteristic orbital configuration, in which an additional planet is located interior to a near 2:1 period-ratio pair, is relatively rare around FGK dwarfs.

AB - We report the discovery of one super-Earth- (TOI-1749b) and two sub-Neptune-sized planets (TOI-1749c and TOI-1749d) transiting an early M dwarf at a distance of 100 pc, which were first identified as planetary candidates using data from the TESS photometric survey. We have followed up this system from the ground by means of multiband transit photometry, adaptive optics imaging, and low-resolution spectroscopy, from which we have validated the planetary nature of the candidates. We find that TOI-1749b, c, and d have orbital periods of 2.39, 4.49, and 9.05 days, and radii of 1.4, 2.1, and 2.5 R ⊕, respectively. We also place 95% confidence upper limits on the masses of 57, 14, and 15 M ⊕ for TOI-1749b, c, and d, respectively, from transit timing variations. The periods, sizes, and tentative masses of these planets are in line with a scenario in which all three planets initially had a hydrogen envelope on top of a rocky core, and only the envelope of the innermost planet has been stripped away by photoevaporation and/or core-powered mass-loss mechanisms. These planets are similar to other planetary trios found around M dwarfs, such as TOI-175b,c,d and TOI-270b,c,d, in the sense that the outer pair has a period ratio within 1% of 2. Such a characteristic orbital configuration, in which an additional planet is located interior to a near 2:1 period-ratio pair, is relatively rare around FGK dwarfs.

UR - http://www.scopus.com/inward/record.url?scp=85116388645&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85116388645&partnerID=8YFLogxK

U2 - 10.3847/1538-3881/ac13a5

DO - 10.3847/1538-3881/ac13a5

M3 - Article

AN - SCOPUS:85116388645

SN - 0004-6256

VL - 162

JO - Astronomical Journal

JF - Astronomical Journal

IS - 4

M1 - 167

ER -

TOI-1749: An M dwarf with a Trio of Planets including a Near-resonant Pair

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