Discovery and mass measurement of the hot, transiting, Earth-sized planet, GJ 3929 b

J. Kemmer; S. Dreizler; D. Kossakowski; S. Stock; A. Quirrenbach; J. A. Caballero; P. J. Amado; K. A. Collins; N. Espinoza; E. Herrero; J. M. Jenkins; D. W. Latham; J. Lillo-Box; N. Narita; E. Pallé; A. Reiners; I. Ribas; G. Ricker; E. Rodríguez; S. Seager; R. Vanderspek; R. Wells; J. Winn; F. J. Aceituno; V. J.S. Béjar; T. Barclay; P. Bluhm; P. Chaturvedi; C. Cifuentes; K. I. Collins; M. Cortés-Contreras; B. O. Demory; M. M. Fausnaugh; A. Fukui; Y. Gómez Maqueo Chew; D. Galadí-Enríquez; T. Gan; M. Gillon; A. Golovin; A. P. Hatzes; Th Henning; C. Huang; S. V. Jeffers; A. Kaminski; M. Kunimoto; M. Kürster; M. J. López-González; M. Lafarga; R. Luque; J. McCormac; K. Molaverdikhani; D. Montes; J. C. Morales; V. M. Passegger; S. Reffert; L. Sabin; P. Schöfer; N. Schanche; M. Schlecker; U. Schroffenegger; R. P. Schwarz; A. Schweitzer; A. Sota; P. Tenenbaum; T. Trifonov; S. Vanaverbeke; M. Zechmeister

doi:10.1051/0004-6361/202142653

Discovery and mass measurement of the hot, transiting, Earth-sized planet, GJ 3929 b

J. Kemmer, S. Dreizler, D. Kossakowski, S. Stock, A. Quirrenbach, J. A. Caballero, P. J. Amado, K. A. Collins, N. Espinoza, E. Herrero, J. M. Jenkins, D. W. Latham, J. Lillo-Box, N. Narita, E. Pallé, A. Reiners, I. Ribas, G. Ricker, E. Rodríguez, S. SeagerR. Vanderspek, R. Wells, J. Winn, F. J. Aceituno, V. J.S. Béjar, T. Barclay, P. Bluhm, P. Chaturvedi, C. Cifuentes, K. I. Collins, M. Cortés-Contreras, B. O. Demory, M. M. Fausnaugh, A. Fukui, Y. Gómez Maqueo Chew, D. Galadí-Enríquez, T. Gan, M. Gillon, A. Golovin, A. P. Hatzes, Th Henning, C. Huang, S. V. Jeffers, A. Kaminski, M. Kunimoto, M. Kürster, M. J. López-González, M. Lafarga, R. Luque, J. McCormac, K. Molaverdikhani, D. Montes, J. C. Morales, V. M. Passegger, S. Reffert, L. Sabin, P. Schöfer, N. Schanche, M. Schlecker, U. Schroffenegger, R. P. Schwarz, A. Schweitzer, A. Sota, P. Tenenbaum, T. Trifonov, S. Vanaverbeke, M. Zechmeister

Astrophysical Sciences

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Abstract

We report the discovery of GJ 3929 b, a hot Earth-sized planet orbiting the nearby M3.5 V dwarf star, GJ 3929 (G 180-18, TOI-2013). Joint modelling of photometric observations from TESS sectors 24 and 25 together with 73 spectroscopic observations from CARMENES and follow-up transit observations from SAINT-EX, LCOGT, and OSN yields a planet radius of Rb = 1.150 ± 0.040 R⊕, a mass of Mb = 1.21 ± 0.42 M⊕, and an orbital period of Pb = 2.6162745 ± 0.0000030 d. The resulting density of ρb = 4.4 ± 1.6 g cm-3 is compatible with the Earth's mean density of about 5.5 g cm-3. Due to the apparent brightness of the host star (J = 8.7 mag) and its small size, GJ 3929 b is a promising target for atmospheric characterisation with the JWST. Additionally, the radial velocity data show evidence for another planet candidate with P[c] = 14.303 ± 0.035 d, which is likely unrelated to the stellar rotation period, Prot = 122 ± 13 d, which we determined from archival HATNet and ASAS-SN photometry combined with newly obtained TJO data.

Original language	English (US)
Article number	A17
Journal	Astronomy and Astrophysics
Volume	659
DOIs	https://doi.org/10.1051/0004-6361/202142653
State	Published - Mar 1 2022

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planetary systems
Planets and satellites: Detection
Stars: Individual: GJ 3929
Stars: Late-type
Techniques: Photometric
Techniques: Radial velocities

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10.1051/0004-6361/202142653

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Kemmer, J., Dreizler, S., Kossakowski, D., Stock, S., Quirrenbach, A., Caballero, J. A., Amado, P. J., Collins, K. A., Espinoza, N., Herrero, E., Jenkins, J. M., Latham, D. W., Lillo-Box, J., Narita, N., Pallé, E., Reiners, A., Ribas, I., Ricker, G., Rodríguez, E., ... Zechmeister, M. (2022). Discovery and mass measurement of the hot, transiting, Earth-sized planet, GJ 3929 b. Astronomy and Astrophysics, 659, Article A17. https://doi.org/10.1051/0004-6361/202142653

@article{c096c1eca2d94644bdcb452953afda8a,

title = "Discovery and mass measurement of the hot, transiting, Earth-sized planet, GJ 3929 b",

abstract = "We report the discovery of GJ 3929 b, a hot Earth-sized planet orbiting the nearby M3.5 V dwarf star, GJ 3929 (G 180-18, TOI-2013). Joint modelling of photometric observations from TESS sectors 24 and 25 together with 73 spectroscopic observations from CARMENES and follow-up transit observations from SAINT-EX, LCOGT, and OSN yields a planet radius of Rb = 1.150 ± 0.040 R⊕, a mass of Mb = 1.21 ± 0.42 M⊕, and an orbital period of Pb = 2.6162745 ± 0.0000030 d. The resulting density of ρb = 4.4 ± 1.6 g cm-3 is compatible with the Earth's mean density of about 5.5 g cm-3. Due to the apparent brightness of the host star (J = 8.7 mag) and its small size, GJ 3929 b is a promising target for atmospheric characterisation with the JWST. Additionally, the radial velocity data show evidence for another planet candidate with P[c] = 14.303 ± 0.035 d, which is likely unrelated to the stellar rotation period, Prot = 122 ± 13 d, which we determined from archival HATNet and ASAS-SN photometry combined with newly obtained TJO data.",

keywords = "Planetary systems, Planets and satellites: Detection, Stars: Individual: GJ 3929, Stars: Late-type, Techniques: Photometric, Techniques: Radial velocities",

author = "J. Kemmer and S. Dreizler and D. Kossakowski and S. Stock and A. Quirrenbach and Caballero, {J. A.} and Amado, {P. J.} and Collins, {K. A.} and N. Espinoza and E. Herrero and Jenkins, {J. M.} and Latham, {D. W.} and J. Lillo-Box and N. Narita and E. Pall{\'e} and A. Reiners and I. Ribas and G. Ricker and E. Rodr{\'i}guez and S. Seager and R. Vanderspek and R. Wells and J. Winn and Aceituno, {F. J.} and B{\'e}jar, {V. J.S.} and T. Barclay and P. Bluhm and P. Chaturvedi and C. Cifuentes and Collins, {K. I.} and M. Cort{\'e}s-Contreras and Demory, {B. O.} and Fausnaugh, {M. M.} and A. Fukui and {G{\'o}mez Maqueo Chew}, Y. and D. Galad{\'i}-Enr{\'i}quez and T. Gan and M. Gillon and A. Golovin and Hatzes, {A. P.} and Th Henning and C. Huang and Jeffers, {S. V.} and A. Kaminski and M. Kunimoto and M. K{\"u}rster and L{\'o}pez-Gonz{\'a}lez, {M. J.} and M. Lafarga and R. Luque and J. McCormac and K. Molaverdikhani and D. Montes and Morales, {J. C.} and Passegger, {V. M.} and S. Reffert and L. Sabin and P. Sch{\"o}fer and N. Schanche and M. Schlecker and U. Schroffenegger and Schwarz, {R. P.} and A. Schweitzer and A. Sota and P. Tenenbaum and T. Trifonov and S. Vanaverbeke and M. Zechmeister",

note = "Publisher Copyright: {\textcopyright} 2022 ESO.",

year = "2022",

month = mar,

day = "1",

doi = "10.1051/0004-6361/202142653",

language = "English (US)",

volume = "659",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Kemmer, J, Dreizler, S, Kossakowski, D, Stock, S, Quirrenbach, A, Caballero, JA, Amado, PJ, Collins, KA, Espinoza, N, Herrero, E, Jenkins, JM, Latham, DW, Lillo-Box, J, Narita, N, Pallé, E, Reiners, A, Ribas, I, Ricker, G, Rodríguez, E, Seager, S, Vanderspek, R, Wells, R, Winn, J, Aceituno, FJ, Béjar, VJS, Barclay, T, Bluhm, P, Chaturvedi, P, Cifuentes, C, Collins, KI, Cortés-Contreras, M, Demory, BO, Fausnaugh, MM, Fukui, A, Gómez Maqueo Chew, Y, Galadí-Enríquez, D, Gan, T, Gillon, M, Golovin, A, Hatzes, AP, Henning, T, Huang, C, Jeffers, SV, Kaminski, A, Kunimoto, M, Kürster, M, López-González, MJ, Lafarga, M, Luque, R, McCormac, J, Molaverdikhani, K, Montes, D, Morales, JC, Passegger, VM, Reffert, S, Sabin, L, Schöfer, P, Schanche, N, Schlecker, M, Schroffenegger, U, Schwarz, RP, Schweitzer, A, Sota, A, Tenenbaum, P, Trifonov, T, Vanaverbeke, S & Zechmeister, M 2022, 'Discovery and mass measurement of the hot, transiting, Earth-sized planet, GJ 3929 b', Astronomy and Astrophysics, vol. 659, A17. https://doi.org/10.1051/0004-6361/202142653

TY - JOUR

T1 - Discovery and mass measurement of the hot, transiting, Earth-sized planet, GJ 3929 b

AU - Kemmer, J.

AU - Dreizler, S.

AU - Kossakowski, D.

AU - Stock, S.

AU - Quirrenbach, A.

AU - Caballero, J. A.

AU - Amado, P. J.

AU - Collins, K. A.

AU - Espinoza, N.

AU - Herrero, E.

AU - Jenkins, J. M.

AU - Latham, D. W.

AU - Lillo-Box, J.

AU - Narita, N.

AU - Pallé, E.

AU - Reiners, A.

AU - Ribas, I.

AU - Ricker, G.

AU - Rodríguez, E.

AU - Seager, S.

AU - Vanderspek, R.

AU - Wells, R.

AU - Winn, J.

AU - Aceituno, F. J.

AU - Béjar, V. J.S.

AU - Barclay, T.

AU - Bluhm, P.

AU - Chaturvedi, P.

AU - Cifuentes, C.

AU - Collins, K. I.

AU - Cortés-Contreras, M.

AU - Demory, B. O.

AU - Fausnaugh, M. M.

AU - Fukui, A.

AU - Gómez Maqueo Chew, Y.

AU - Galadí-Enríquez, D.

AU - Gan, T.

AU - Gillon, M.

AU - Golovin, A.

AU - Hatzes, A. P.

AU - Henning, Th

AU - Huang, C.

AU - Jeffers, S. V.

AU - Kaminski, A.

AU - Kunimoto, M.

AU - Kürster, M.

AU - López-González, M. J.

AU - Lafarga, M.

AU - Luque, R.

AU - McCormac, J.

AU - Molaverdikhani, K.

AU - Montes, D.

AU - Morales, J. C.

AU - Passegger, V. M.

AU - Reffert, S.

AU - Sabin, L.

AU - Schöfer, P.

AU - Schanche, N.

AU - Schlecker, M.

AU - Schroffenegger, U.

AU - Schwarz, R. P.

AU - Schweitzer, A.

AU - Sota, A.

AU - Tenenbaum, P.

AU - Trifonov, T.

AU - Vanaverbeke, S.

AU - Zechmeister, M.

PY - 2022/3/1

Y1 - 2022/3/1

N2 - We report the discovery of GJ 3929 b, a hot Earth-sized planet orbiting the nearby M3.5 V dwarf star, GJ 3929 (G 180-18, TOI-2013). Joint modelling of photometric observations from TESS sectors 24 and 25 together with 73 spectroscopic observations from CARMENES and follow-up transit observations from SAINT-EX, LCOGT, and OSN yields a planet radius of Rb = 1.150 ± 0.040 R⊕, a mass of Mb = 1.21 ± 0.42 M⊕, and an orbital period of Pb = 2.6162745 ± 0.0000030 d. The resulting density of ρb = 4.4 ± 1.6 g cm-3 is compatible with the Earth's mean density of about 5.5 g cm-3. Due to the apparent brightness of the host star (J = 8.7 mag) and its small size, GJ 3929 b is a promising target for atmospheric characterisation with the JWST. Additionally, the radial velocity data show evidence for another planet candidate with P[c] = 14.303 ± 0.035 d, which is likely unrelated to the stellar rotation period, Prot = 122 ± 13 d, which we determined from archival HATNet and ASAS-SN photometry combined with newly obtained TJO data.

AB - We report the discovery of GJ 3929 b, a hot Earth-sized planet orbiting the nearby M3.5 V dwarf star, GJ 3929 (G 180-18, TOI-2013). Joint modelling of photometric observations from TESS sectors 24 and 25 together with 73 spectroscopic observations from CARMENES and follow-up transit observations from SAINT-EX, LCOGT, and OSN yields a planet radius of Rb = 1.150 ± 0.040 R⊕, a mass of Mb = 1.21 ± 0.42 M⊕, and an orbital period of Pb = 2.6162745 ± 0.0000030 d. The resulting density of ρb = 4.4 ± 1.6 g cm-3 is compatible with the Earth's mean density of about 5.5 g cm-3. Due to the apparent brightness of the host star (J = 8.7 mag) and its small size, GJ 3929 b is a promising target for atmospheric characterisation with the JWST. Additionally, the radial velocity data show evidence for another planet candidate with P[c] = 14.303 ± 0.035 d, which is likely unrelated to the stellar rotation period, Prot = 122 ± 13 d, which we determined from archival HATNet and ASAS-SN photometry combined with newly obtained TJO data.

KW - Planetary systems

KW - Planets and satellites: Detection

KW - Stars: Individual: GJ 3929

KW - Stars: Late-type

KW - Techniques: Photometric

KW - Techniques: Radial velocities

UR - http://www.scopus.com/inward/record.url?scp=85126122704&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85126122704&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/202142653

DO - 10.1051/0004-6361/202142653

M3 - Article

AN - SCOPUS:85126122704

SN - 0004-6361

VL - 659

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A17

ER -

Discovery and mass measurement of the hot, transiting, Earth-sized planet, GJ 3929 b

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All Science Journal Classification (ASJC) codes

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