TOI-1468: A system of two transiting planets, a super-Earth and a mini-Neptune, on opposite sides of the radius valley*

P. Chaturvedi; P. Bluhm; E. Nagel; A. P. Hatzes; G. Morello; M. Brady; J. Korth; K. Molaverdikhani; D. Kossakowski; J. A. Caballero; E. W. Guenther; E. Pallé; N. Espinoza; A. Seifahrt; N. Lodieu; C. Cifuentes; E. Furlan; P. J. Amado; T. Barclay; J. Bean; V. J.S. Béjar; G. Bergond; A. W. Boyle; D. Ciardi; K. A. Collins; K. I. Collins; E. Esparza-Borges; A. Fukui; C. L. Gnilka; R. Goeke; P. Guerra; Th Henning; E. Herrero; S. B. Howell; S. V. Jeffers; J. M. Jenkins; E. L.N. Jensen; D. Kasper; T. Kodama; D. W. Latham; M. J. López-González; R. Luque; D. Montes; J. C. Morales; M. Mori; F. Murgas; N. Narita; G. Nowak; H. Parviainen; V. M. Passegger; A. Quirrenbach; S. Reffert; A. Reiners; I. Ribas; G. R. Ricker; E. Rodríguez; C. Rodríguez-López; M. Schlecker; R. P. Schwarz; A. Schweitzer; S. Seager; G. Stefánsson; C. Stockdale; L. Tal-Or; J. D. Twicken; S. Vanaverbeke; G. Wang; D. Watanabe; J. N. Winn; M. Zechmeister

doi:10.1051/0004-6361/202244056

TOI-1468: A system of two transiting planets, a super-Earth and a mini-Neptune, on opposite sides of the radius valley^*

P. Chaturvedi, P. Bluhm, E. Nagel, A. P. Hatzes, G. Morello, M. Brady, J. Korth, K. Molaverdikhani, D. Kossakowski, J. A. Caballero, E. W. Guenther, E. Pallé, N. Espinoza, A. Seifahrt, N. Lodieu, C. Cifuentes, E. Furlan, P. J. Amado, T. Barclay, J. BeanV. J.S. Béjar, G. Bergond, A. W. Boyle, D. Ciardi, K. A. Collins, K. I. Collins, E. Esparza-Borges, A. Fukui, C. L. Gnilka, R. Goeke, P. Guerra, Th Henning, E. Herrero, S. B. Howell, S. V. Jeffers, J. M. Jenkins, E. L.N. Jensen, D. Kasper, T. Kodama, D. W. Latham, M. J. López-González, R. Luque, D. Montes, J. C. Morales, M. Mori, F. Murgas, N. Narita, G. Nowak, H. Parviainen, V. M. Passegger, A. Quirrenbach, S. Reffert, A. Reiners, I. Ribas, G. R. Ricker, E. Rodríguez, C. Rodríguez-López, M. Schlecker, R. P. Schwarz, A. Schweitzer, S. Seager, G. Stefánsson, C. Stockdale, L. Tal-Or, J. D. Twicken, S. Vanaverbeke, G. Wang, D. Watanabe, J. N. Winn, M. Zechmeister

Astrophysical Sciences

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

We report the discovery and characterization of two small transiting planets orbiting the bright M3.0 V star TOI-1468 (LSPM J0106+1913), whose transit signals were detected in the photometric time series in three sectors of the TESS mission. We confirm the planetary nature of both of them using precise radial velocity measurements from the CARMENES and MAROON-X spectrographs, and supplement them with ground-based transit photometry. A joint analysis of all these data reveals that the shorter-period planet, TOI-1468 b (P_b = 1.88 d), has a planetary mass of M_b = 3.21 ± 0.24 M and a radius of R_b = 1.280⁺₋⁰₀⁰³⁸₀₃₉ R, resulting in a density of ρ_b = 8.39⁺₋¹₀⁰⁵₉₂ g cm⁻³, which is consistent with a mostly rocky composition. For the outer planet, TOI-1468 c (P_c = 15.53 d), we derive a mass of M_c = 6.64⁺₋⁰₀⁶⁷₆₈ M, a radius of R_c = 2.06 ± 0.04 R, and a bulk density of ρ_c = 2.00⁺₋⁰₀²¹₁₉ g cm⁻³, which corresponds to a rocky core composition with a H/He gas envelope. These planets are located on opposite sides of the radius valley, making our system an interesting discovery as there are only a handful of other systems with the same properties. This discovery can further help determine a more precise location of the radius valley for small planets around M dwarfs and, therefore, shed more light on planet formation and evolution scenarios.

Original language	English (US)
Article number	A155
Journal	Astronomy and Astrophysics
Volume	666
DOIs	https://doi.org/10.1051/0004-6361/202244056
State	Published - Oct 1 2022

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

stars: individual: TOI-1468
stars: late-type
techniques: photometric
techniques: radial velocities

Access to Document

10.1051/0004-6361/202244056

Cite this

Chaturvedi, P., Bluhm, P., Nagel, E., Hatzes, A. P., Morello, G., Brady, M., Korth, J., Molaverdikhani, K., Kossakowski, D., Caballero, J. A., Guenther, E. W., Pallé, E., Espinoza, N., Seifahrt, A., Lodieu, N., Cifuentes, C., Furlan, E., Amado, P. J., Barclay, T., ... Zechmeister, M. (2022). TOI-1468: A system of two transiting planets, a super-Earth and a mini-Neptune, on opposite sides of the radius valley^*. Astronomy and Astrophysics, 666, Article A155. https://doi.org/10.1051/0004-6361/202244056

@article{ea34f7c0889449659d7e380d0a8737e7,

title = "TOI-1468: A system of two transiting planets, a super-Earth and a mini-Neptune, on opposite sides of the radius valley*",

abstract = "We report the discovery and characterization of two small transiting planets orbiting the bright M3.0 V star TOI-1468 (LSPM J0106+1913), whose transit signals were detected in the photometric time series in three sectors of the TESS mission. We confirm the planetary nature of both of them using precise radial velocity measurements from the CARMENES and MAROON-X spectrographs, and supplement them with ground-based transit photometry. A joint analysis of all these data reveals that the shorter-period planet, TOI-1468 b (Pb = 1.88 d), has a planetary mass of Mb = 3.21 ± 0.24 M and a radius of Rb = 1.280+−00038039 R, resulting in a density of ρb = 8.39+−100592 g cm−3, which is consistent with a mostly rocky composition. For the outer planet, TOI-1468 c (Pc = 15.53 d), we derive a mass of Mc = 6.64+−006768 M, a radius of Rc = 2.06 ± 0.04 R, and a bulk density of ρc = 2.00+−002119 g cm−3, which corresponds to a rocky core composition with a H/He gas envelope. These planets are located on opposite sides of the radius valley, making our system an interesting discovery as there are only a handful of other systems with the same properties. This discovery can further help determine a more precise location of the radius valley for small planets around M dwarfs and, therefore, shed more light on planet formation and evolution scenarios.",

keywords = "stars: individual: TOI-1468, stars: late-type, techniques: photometric, techniques: radial velocities",

author = "P. Chaturvedi and P. Bluhm and E. Nagel and Hatzes, {A. P.} and G. Morello and M. Brady and J. Korth and K. Molaverdikhani and D. Kossakowski and Caballero, {J. A.} and Guenther, {E. W.} and E. Pall{\'e} and N. Espinoza and A. Seifahrt and N. Lodieu and C. Cifuentes and E. Furlan and Amado, {P. J.} and T. Barclay and J. Bean and B{\'e}jar, {V. J.S.} and G. Bergond and Boyle, {A. W.} and D. Ciardi and Collins, {K. A.} and Collins, {K. I.} and E. Esparza-Borges and A. Fukui and Gnilka, {C. L.} and R. Goeke and P. Guerra and Th Henning and E. Herrero and Howell, {S. B.} and Jeffers, {S. V.} and Jenkins, {J. M.} and Jensen, {E. L.N.} and D. Kasper and T. Kodama and Latham, {D. W.} and L{\'o}pez-Gonz{\'a}lez, {M. J.} and R. Luque and D. Montes and Morales, {J. C.} and M. Mori and F. Murgas and N. Narita and G. Nowak and H. Parviainen and Passegger, {V. M.} and A. Quirrenbach and S. Reffert and A. Reiners and I. Ribas and Ricker, {G. R.} and E. Rodr{\'i}guez and C. Rodr{\'i}guez-L{\'o}pez and M. Schlecker and Schwarz, {R. P.} and A. Schweitzer and S. Seager and G. Stef{\'a}nsson and C. Stockdale and L. Tal-Or and Twicken, {J. D.} and S. Vanaverbeke and G. Wang and D. Watanabe and Winn, {J. N.} and M. Zechmeister",

note = "Publisher Copyright: {\textcopyright} P. Chaturvedi et al. 2022.",

year = "2022",

month = oct,

day = "1",

doi = "10.1051/0004-6361/202244056",

language = "English (US)",

volume = "666",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Chaturvedi, P, Bluhm, P, Nagel, E, Hatzes, AP, Morello, G, Brady, M, Korth, J, Molaverdikhani, K, Kossakowski, D, Caballero, JA, Guenther, EW, Pallé, E, Espinoza, N, Seifahrt, A, Lodieu, N, Cifuentes, C, Furlan, E, Amado, PJ, Barclay, T, Bean, J, Béjar, VJS, Bergond, G, Boyle, AW, Ciardi, D, Collins, KA, Collins, KI, Esparza-Borges, E, Fukui, A, Gnilka, CL, Goeke, R, Guerra, P, Henning, T, Herrero, E, Howell, SB, Jeffers, SV, Jenkins, JM, Jensen, ELN, Kasper, D, Kodama, T, Latham, DW, López-González, MJ, Luque, R, Montes, D, Morales, JC, Mori, M, Murgas, F, Narita, N, Nowak, G, Parviainen, H, Passegger, VM, Quirrenbach, A, Reffert, S, Reiners, A, Ribas, I, Ricker, GR, Rodríguez, E, Rodríguez-López, C, Schlecker, M, Schwarz, RP, Schweitzer, A, Seager, S, Stefánsson, G, Stockdale, C, Tal-Or, L, Twicken, JD, Vanaverbeke, S, Wang, G, Watanabe, D, Winn, JN & Zechmeister, M 2022, 'TOI-1468: A system of two transiting planets, a super-Earth and a mini-Neptune, on opposite sides of the radius valley^*', Astronomy and Astrophysics, vol. 666, A155. https://doi.org/10.1051/0004-6361/202244056

TY - JOUR

T1 - TOI-1468

T2 - A system of two transiting planets, a super-Earth and a mini-Neptune, on opposite sides of the radius valley*

AU - Chaturvedi, P.

AU - Bluhm, P.

AU - Nagel, E.

AU - Hatzes, A. P.

AU - Morello, G.

AU - Brady, M.

AU - Korth, J.

AU - Molaverdikhani, K.

AU - Kossakowski, D.

AU - Caballero, J. A.

AU - Guenther, E. W.

AU - Pallé, E.

AU - Espinoza, N.

AU - Seifahrt, A.

AU - Lodieu, N.

AU - Cifuentes, C.

AU - Furlan, E.

AU - Amado, P. J.

AU - Barclay, T.

AU - Bean, J.

AU - Béjar, V. J.S.

AU - Bergond, G.

AU - Boyle, A. W.

AU - Ciardi, D.

AU - Collins, K. A.

AU - Collins, K. I.

AU - Esparza-Borges, E.

AU - Fukui, A.

AU - Gnilka, C. L.

AU - Goeke, R.

AU - Guerra, P.

AU - Henning, Th

AU - Herrero, E.

AU - Howell, S. B.

AU - Jeffers, S. V.

AU - Jenkins, J. M.

AU - Jensen, E. L.N.

AU - Kasper, D.

AU - Kodama, T.

AU - Latham, D. W.

AU - López-González, M. J.

AU - Luque, R.

AU - Montes, D.

AU - Morales, J. C.

AU - Mori, M.

AU - Murgas, F.

AU - Narita, N.

AU - Nowak, G.

AU - Parviainen, H.

AU - Passegger, V. M.

AU - Quirrenbach, A.

AU - Reffert, S.

AU - Reiners, A.

AU - Ribas, I.

AU - Ricker, G. R.

AU - Rodríguez, E.

AU - Rodríguez-López, C.

AU - Schlecker, M.

AU - Schwarz, R. P.

AU - Schweitzer, A.

AU - Seager, S.

AU - Stefánsson, G.

AU - Stockdale, C.

AU - Tal-Or, L.

AU - Twicken, J. D.

AU - Vanaverbeke, S.

AU - Wang, G.

AU - Watanabe, D.

AU - Winn, J. N.

AU - Zechmeister, M.

PY - 2022/10/1

Y1 - 2022/10/1

N2 - We report the discovery and characterization of two small transiting planets orbiting the bright M3.0 V star TOI-1468 (LSPM J0106+1913), whose transit signals were detected in the photometric time series in three sectors of the TESS mission. We confirm the planetary nature of both of them using precise radial velocity measurements from the CARMENES and MAROON-X spectrographs, and supplement them with ground-based transit photometry. A joint analysis of all these data reveals that the shorter-period planet, TOI-1468 b (Pb = 1.88 d), has a planetary mass of Mb = 3.21 ± 0.24 M and a radius of Rb = 1.280+−00038039 R, resulting in a density of ρb = 8.39+−100592 g cm−3, which is consistent with a mostly rocky composition. For the outer planet, TOI-1468 c (Pc = 15.53 d), we derive a mass of Mc = 6.64+−006768 M, a radius of Rc = 2.06 ± 0.04 R, and a bulk density of ρc = 2.00+−002119 g cm−3, which corresponds to a rocky core composition with a H/He gas envelope. These planets are located on opposite sides of the radius valley, making our system an interesting discovery as there are only a handful of other systems with the same properties. This discovery can further help determine a more precise location of the radius valley for small planets around M dwarfs and, therefore, shed more light on planet formation and evolution scenarios.

AB - We report the discovery and characterization of two small transiting planets orbiting the bright M3.0 V star TOI-1468 (LSPM J0106+1913), whose transit signals were detected in the photometric time series in three sectors of the TESS mission. We confirm the planetary nature of both of them using precise radial velocity measurements from the CARMENES and MAROON-X spectrographs, and supplement them with ground-based transit photometry. A joint analysis of all these data reveals that the shorter-period planet, TOI-1468 b (Pb = 1.88 d), has a planetary mass of Mb = 3.21 ± 0.24 M and a radius of Rb = 1.280+−00038039 R, resulting in a density of ρb = 8.39+−100592 g cm−3, which is consistent with a mostly rocky composition. For the outer planet, TOI-1468 c (Pc = 15.53 d), we derive a mass of Mc = 6.64+−006768 M, a radius of Rc = 2.06 ± 0.04 R, and a bulk density of ρc = 2.00+−002119 g cm−3, which corresponds to a rocky core composition with a H/He gas envelope. These planets are located on opposite sides of the radius valley, making our system an interesting discovery as there are only a handful of other systems with the same properties. This discovery can further help determine a more precise location of the radius valley for small planets around M dwarfs and, therefore, shed more light on planet formation and evolution scenarios.

KW - stars: individual: TOI-1468

KW - stars: late-type

KW - techniques: photometric

KW - techniques: radial velocities

UR - http://www.scopus.com/inward/record.url?scp=85149136512&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85149136512&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/202244056

DO - 10.1051/0004-6361/202244056

M3 - Article

AN - SCOPUS:85149136512

SN - 0004-6361

VL - 666

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A155

ER -