Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)

J. Kemmer; S. Stock; D. Kossakowski; A. Kaminski; K. Molaverdikhani; M. Schlecker; J. A. Caballero; P. J. Amado; N. Astudillo-Defru; X. Bonfils; D. Ciardi; K. A. Collins; N. Espinoza; A. Fukui; T. Hirano; J. M. Jenkins; D. W. Latham; E. C. Matthews; N. Narita; E. Pallé; H. Parviainen; A. Quirrenbach; A. Reiners; I. Ribas; G. Ricker; J. E. Schlieder; S. Seager; R. Vanderspek; J. N. Winn; J. M. Almenara; V. J.S. Béjar; P. Bluhm; F. Bouchy; P. Boyd; J. L. Christiansen; C. Cifuentes; R. Cloutier; K. I. Collins; M. Cortés-Contreras; I. J.M. Crossfield; N. Crouzet; J. P. De Leon; D. D. Della-Rose; X. Delfosse; S. Dreizler; E. Esparza-Borges; Z. Essack; Th Forveille; P. Figueira; D. Galadí-Enríquez; T. Gan; A. Glidden; E. J. Gonzales; P. Guerra; H. Harakawa; A. P. Hatzes; Th Henning; E. Herrero; K. Hodapp; Y. Hori; S. B. Howell; M. Ikoma; K. Isogai; S. V. Jeffers; M. Kürster; K. Kawauchi; T. Kimura; P. Klagyivik; T. Kotani; T. Kurokawa; N. Kusakabe; M. Kuzuhara; M. Lafarga; J. H. Livingston; R. Luque; R. Matson; J. C. Morales; M. Mori; P. S. Muirhead; F. Murgas; J. Nishikawa; T. Nishiumi; M. Omiya; S. Reffert; C. Rodríguez López; N. C. Santos; P. Schöfer; R. P. Schwarz; B. Shiao; M. Tamura; Y. Terada; J. D. Twicken; A. Ueda; S. Vievard; N. Watanabe; M. Zechmeister

doi:10.1051/0004-6361/202038967

Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)

J. Kemmer, S. Stock, D. Kossakowski, A. Kaminski, K. Molaverdikhani, M. Schlecker, J. A. Caballero, P. J. Amado, N. Astudillo-Defru, X. Bonfils, D. Ciardi, K. A. Collins, N. Espinoza, A. Fukui, T. Hirano, J. M. Jenkins, D. W. Latham, E. C. Matthews, N. Narita, E. PalléH. Parviainen, A. Quirrenbach, A. Reiners, I. Ribas, G. Ricker, J. E. Schlieder, S. Seager, R. Vanderspek, J. N. Winn, J. M. Almenara, V. J.S. Béjar, P. Bluhm, F. Bouchy, P. Boyd, J. L. Christiansen, C. Cifuentes, R. Cloutier, K. I. Collins, M. Cortés-Contreras, I. J.M. Crossfield, N. Crouzet, J. P. De Leon, D. D. Della-Rose, X. Delfosse, S. Dreizler, E. Esparza-Borges, Z. Essack, Th Forveille, P. Figueira, D. Galadí-Enríquez, T. Gan, A. Glidden, E. J. Gonzales, P. Guerra, H. Harakawa, A. P. Hatzes, Th Henning, E. Herrero, K. Hodapp, Y. Hori, S. B. Howell, M. Ikoma, K. Isogai, S. V. Jeffers, M. Kürster, K. Kawauchi, T. Kimura, P. Klagyivik, T. Kotani, T. Kurokawa, N. Kusakabe, M. Kuzuhara, M. Lafarga, J. H. Livingston, R. Luque, R. Matson, J. C. Morales, M. Mori, P. S. Muirhead, F. Murgas, J. Nishikawa, T. Nishiumi, M. Omiya, S. Reffert, C. Rodríguez López, N. C. Santos, P. Schöfer, R. P. Schwarz, B. Shiao, M. Tamura, Y. Terada, J. D. Twicken, A. Ueda, S. Vievard, N. Watanabe, M. Zechmeister

Astrophysical Sciences

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Abstract

We present the confirmation and characterisation of GJ 3473 b (G 50-16, TOI-488.01), a hot Earth-sized planet orbiting an M4 dwarf star, whose transiting signal (P = 1.1980035 ± 0.0000018 d) was first detected by the Transiting Exoplanet Survey Satellite (TESS). Through a joint modelling of follow-up radial velocity observations with CARMENES, IRD, and HARPS together with extensive ground-based photometric follow-up observations with LCOGT, MuSCAT, and MuSCAT2, we determined a precise planetary mass, Mb = 1.86 ± 0.30 M·, and radius, Rb = 1.264 ± 0.050 R·. Additionally, we report the discovery of a second, temperate, non-transiting planet in the system, GJ 3473 c, which has a minimum mass, Mc sin i = 7.41 ± 0.91 M·, and orbital period, Pc = 15.509 ± 0.033 d. The inner planet of the system, GJ 3473 b, is one of the hottest transiting Earth-sized planets known thus far, accompanied by a dynamical mass measurement, which makes it a particularly attractive target for thermal emission spectroscopy.

Original language	English (US)
Article number	A236
Journal	Astronomy and Astrophysics
Volume	642
DOIs	https://doi.org/10.1051/0004-6361/202038967
State	Published - Oct 1 2020

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planetary systems
Planets and satellites: detection
Stars: individual: G 50-16
Stars: late-type
Techniques: photometric
Techniques: radial velocities

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10.1051/0004-6361/202038967

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Kemmer, J., Stock, S., Kossakowski, D., Kaminski, A., Molaverdikhani, K., Schlecker, M., Caballero, J. A., Amado, P. J., Astudillo-Defru, N., Bonfils, X., Ciardi, D., Collins, K. A., Espinoza, N., Fukui, A., Hirano, T., Jenkins, J. M., Latham, D. W., Matthews, E. C., Narita, N., ... Zechmeister, M. (2020). Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488). Astronomy and Astrophysics, 642, Article A236. https://doi.org/10.1051/0004-6361/202038967

@article{1321dea4727b43fbaf15668ccbd2bd0d,

title = "Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)",

abstract = "We present the confirmation and characterisation of GJ 3473 b (G 50-16, TOI-488.01), a hot Earth-sized planet orbiting an M4 dwarf star, whose transiting signal (P = 1.1980035 ± 0.0000018 d) was first detected by the Transiting Exoplanet Survey Satellite (TESS). Through a joint modelling of follow-up radial velocity observations with CARMENES, IRD, and HARPS together with extensive ground-based photometric follow-up observations with LCOGT, MuSCAT, and MuSCAT2, we determined a precise planetary mass, Mb = 1.86 ± 0.30 M·, and radius, Rb = 1.264 ± 0.050 R·. Additionally, we report the discovery of a second, temperate, non-transiting planet in the system, GJ 3473 c, which has a minimum mass, Mc sin i = 7.41 ± 0.91 M·, and orbital period, Pc = 15.509 ± 0.033 d. The inner planet of the system, GJ 3473 b, is one of the hottest transiting Earth-sized planets known thus far, accompanied by a dynamical mass measurement, which makes it a particularly attractive target for thermal emission spectroscopy.",

keywords = "Planetary systems, Planets and satellites: detection, Stars: individual: G 50-16, Stars: late-type, Techniques: photometric, Techniques: radial velocities",

author = "J. Kemmer and S. Stock and D. Kossakowski and A. Kaminski and K. Molaverdikhani and M. Schlecker and Caballero, {J. A.} and Amado, {P. J.} and N. Astudillo-Defru and X. Bonfils and D. Ciardi and Collins, {K. A.} and N. Espinoza and A. Fukui and T. Hirano and Jenkins, {J. M.} and Latham, {D. W.} and Matthews, {E. C.} and N. Narita and E. Pall{\'e} and H. Parviainen and A. Quirrenbach and A. Reiners and I. Ribas and G. Ricker and Schlieder, {J. E.} and S. Seager and R. Vanderspek and Winn, {J. N.} and Almenara, {J. M.} and B{\'e}jar, {V. J.S.} and P. Bluhm and F. Bouchy and P. Boyd and Christiansen, {J. L.} and C. Cifuentes and R. Cloutier and Collins, {K. I.} and M. Cort{\'e}s-Contreras and Crossfield, {I. J.M.} and N. Crouzet and {De Leon}, {J. P.} and Della-Rose, {D. D.} and X. Delfosse and S. Dreizler and E. Esparza-Borges and Z. Essack and Th Forveille and P. Figueira and D. Galad{\'i}-Enr{\'i}quez and T. Gan and A. Glidden and Gonzales, {E. J.} and P. Guerra and H. Harakawa and Hatzes, {A. P.} and Th Henning and E. Herrero and K. Hodapp and Y. Hori and Howell, {S. B.} and M. Ikoma and K. Isogai and Jeffers, {S. V.} and M. K{\"u}rster and K. Kawauchi and T. Kimura and P. Klagyivik and T. Kotani and T. Kurokawa and N. Kusakabe and M. Kuzuhara and M. Lafarga and Livingston, {J. H.} and R. Luque and R. Matson and Morales, {J. C.} and M. Mori and Muirhead, {P. S.} and F. Murgas and J. Nishikawa and T. Nishiumi and M. Omiya and S. Reffert and {Rodr{\'i}guez L{\'o}pez}, C. and Santos, {N. C.} and P. Sch{\"o}fer and Schwarz, {R. P.} and B. Shiao and M. Tamura and Y. Terada and Twicken, {J. D.} and A. Ueda and S. Vievard and N. Watanabe and M. Zechmeister",

note = "Publisher Copyright: {\textcopyright} 2020 ESO.",

year = "2020",

month = oct,

day = "1",

doi = "10.1051/0004-6361/202038967",

language = "English (US)",

volume = "642",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

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Kemmer, J, Stock, S, Kossakowski, D, Kaminski, A, Molaverdikhani, K, Schlecker, M, Caballero, JA, Amado, PJ, Astudillo-Defru, N, Bonfils, X, Ciardi, D, Collins, KA, Espinoza, N, Fukui, A, Hirano, T, Jenkins, JM, Latham, DW, Matthews, EC, Narita, N, Pallé, E, Parviainen, H, Quirrenbach, A, Reiners, A, Ribas, I, Ricker, G, Schlieder, JE, Seager, S, Vanderspek, R, Winn, JN, Almenara, JM, Béjar, VJS, Bluhm, P, Bouchy, F, Boyd, P, Christiansen, JL, Cifuentes, C, Cloutier, R, Collins, KI, Cortés-Contreras, M, Crossfield, IJM, Crouzet, N, De Leon, JP, Della-Rose, DD, Delfosse, X, Dreizler, S, Esparza-Borges, E, Essack, Z, Forveille, T, Figueira, P, Galadí-Enríquez, D, Gan, T, Glidden, A, Gonzales, EJ, Guerra, P, Harakawa, H, Hatzes, AP, Henning, T, Herrero, E, Hodapp, K, Hori, Y, Howell, SB, Ikoma, M, Isogai, K, Jeffers, SV, Kürster, M, Kawauchi, K, Kimura, T, Klagyivik, P, Kotani, T, Kurokawa, T, Kusakabe, N, Kuzuhara, M, Lafarga, M, Livingston, JH, Luque, R, Matson, R, Morales, JC, Mori, M, Muirhead, PS, Murgas, F, Nishikawa, J, Nishiumi, T, Omiya, M, Reffert, S, Rodríguez López, C, Santos, NC, Schöfer, P, Schwarz, RP, Shiao, B, Tamura, M, Terada, Y, Twicken, JD, Ueda, A, Vievard, S, Watanabe, N & Zechmeister, M 2020, 'Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)', Astronomy and Astrophysics, vol. 642, A236. https://doi.org/10.1051/0004-6361/202038967

TY - JOUR

T1 - Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)

AU - Kemmer, J.

AU - Stock, S.

AU - Kossakowski, D.

AU - Kaminski, A.

AU - Molaverdikhani, K.

AU - Schlecker, M.

AU - Caballero, J. A.

AU - Amado, P. J.

AU - Astudillo-Defru, N.

AU - Bonfils, X.

AU - Ciardi, D.

AU - Collins, K. A.

AU - Espinoza, N.

AU - Fukui, A.

AU - Hirano, T.

AU - Jenkins, J. M.

AU - Latham, D. W.

AU - Matthews, E. C.

AU - Narita, N.

AU - Pallé, E.

AU - Parviainen, H.

AU - Quirrenbach, A.

AU - Reiners, A.

AU - Ribas, I.

AU - Ricker, G.

AU - Schlieder, J. E.

AU - Seager, S.

AU - Vanderspek, R.

AU - Winn, J. N.

AU - Almenara, J. M.

AU - Béjar, V. J.S.

AU - Bluhm, P.

AU - Bouchy, F.

AU - Boyd, P.

AU - Christiansen, J. L.

AU - Cifuentes, C.

AU - Cloutier, R.

AU - Collins, K. I.

AU - Cortés-Contreras, M.

AU - Crossfield, I. J.M.

AU - Crouzet, N.

AU - De Leon, J. P.

AU - Della-Rose, D. D.

AU - Delfosse, X.

AU - Dreizler, S.

AU - Esparza-Borges, E.

AU - Essack, Z.

AU - Forveille, Th

AU - Figueira, P.

AU - Galadí-Enríquez, D.

AU - Gan, T.

AU - Glidden, A.

AU - Gonzales, E. J.

AU - Guerra, P.

AU - Harakawa, H.

AU - Hatzes, A. P.

AU - Henning, Th

AU - Herrero, E.

AU - Hodapp, K.

AU - Hori, Y.

AU - Howell, S. B.

AU - Ikoma, M.

AU - Isogai, K.

AU - Jeffers, S. V.

AU - Kürster, M.

AU - Kawauchi, K.

AU - Kimura, T.

AU - Klagyivik, P.

AU - Kotani, T.

AU - Kurokawa, T.

AU - Kusakabe, N.

AU - Kuzuhara, M.

AU - Lafarga, M.

AU - Livingston, J. H.

AU - Luque, R.

AU - Matson, R.

AU - Morales, J. C.

AU - Mori, M.

AU - Muirhead, P. S.

AU - Murgas, F.

AU - Nishikawa, J.

AU - Nishiumi, T.

AU - Omiya, M.

AU - Reffert, S.

AU - Rodríguez López, C.

AU - Santos, N. C.

AU - Schöfer, P.

AU - Schwarz, R. P.

AU - Shiao, B.

AU - Tamura, M.

AU - Terada, Y.

AU - Twicken, J. D.

AU - Ueda, A.

AU - Vievard, S.

AU - Watanabe, N.

AU - Zechmeister, M.

PY - 2020/10/1

Y1 - 2020/10/1

N2 - We present the confirmation and characterisation of GJ 3473 b (G 50-16, TOI-488.01), a hot Earth-sized planet orbiting an M4 dwarf star, whose transiting signal (P = 1.1980035 ± 0.0000018 d) was first detected by the Transiting Exoplanet Survey Satellite (TESS). Through a joint modelling of follow-up radial velocity observations with CARMENES, IRD, and HARPS together with extensive ground-based photometric follow-up observations with LCOGT, MuSCAT, and MuSCAT2, we determined a precise planetary mass, Mb = 1.86 ± 0.30 M·, and radius, Rb = 1.264 ± 0.050 R·. Additionally, we report the discovery of a second, temperate, non-transiting planet in the system, GJ 3473 c, which has a minimum mass, Mc sin i = 7.41 ± 0.91 M·, and orbital period, Pc = 15.509 ± 0.033 d. The inner planet of the system, GJ 3473 b, is one of the hottest transiting Earth-sized planets known thus far, accompanied by a dynamical mass measurement, which makes it a particularly attractive target for thermal emission spectroscopy.

AB - We present the confirmation and characterisation of GJ 3473 b (G 50-16, TOI-488.01), a hot Earth-sized planet orbiting an M4 dwarf star, whose transiting signal (P = 1.1980035 ± 0.0000018 d) was first detected by the Transiting Exoplanet Survey Satellite (TESS). Through a joint modelling of follow-up radial velocity observations with CARMENES, IRD, and HARPS together with extensive ground-based photometric follow-up observations with LCOGT, MuSCAT, and MuSCAT2, we determined a precise planetary mass, Mb = 1.86 ± 0.30 M·, and radius, Rb = 1.264 ± 0.050 R·. Additionally, we report the discovery of a second, temperate, non-transiting planet in the system, GJ 3473 c, which has a minimum mass, Mc sin i = 7.41 ± 0.91 M·, and orbital period, Pc = 15.509 ± 0.033 d. The inner planet of the system, GJ 3473 b, is one of the hottest transiting Earth-sized planets known thus far, accompanied by a dynamical mass measurement, which makes it a particularly attractive target for thermal emission spectroscopy.

KW - Planetary systems

KW - Planets and satellites: detection

KW - Stars: individual: G 50-16

KW - Stars: late-type

KW - Techniques: photometric

KW - Techniques: radial velocities

UR - http://www.scopus.com/inward/record.url?scp=85094922272&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85094922272&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/202038967

DO - 10.1051/0004-6361/202038967

M3 - Article

AN - SCOPUS:85094922272

SN - 0004-6361

VL - 642

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A236

ER -

Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)

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