TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune

Diana Dragomir; Johanna Teske; Maximilian N. Günther; Damien Ségransan; Jennifer A. Burt; Chelsea X. Huang; Andrew Vanderburg; Elisabeth Matthews; Xavier Dumusque; Keivan G. Stassun; Joshua Pepper; George R. Ricker; Roland Vanderspek; David W. Latham; Sara Seager; Joshua N. Winn; Jon M. Jenkins; Thomas Beatty; François Bouchy; Timothy M. Brown; R. Paul Butler; David R. Ciardi; Jeffrey D. Crane; Jason D. Eastman; Luca Fossati; Jim Francis; Benjamin J. Fulton; B. Scott Gaudi; Robert F. Goeke; David James; Todd C. Klaus; Rudolf B. Kuhn; Christophe Lovis; Michael B. Lund; Scott McDermott; Martin Paegert; Francesco Pepe; Joseph E. Rodriguez; Lizhou Sha; Stephen A. Shectman; Avi Shporer; Robert J. Siverd; Aylin Garcia Soto; Daniel J. Stevens; Joseph D. Twicken; Stéphane Udry; Steven Villanueva; Sharon X. Wang; Bill Wohler; Xinyu Yao; Zhuchang Zhan

doi:10.3847/2041-8213/ab12ed

TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune

Diana Dragomir, Johanna Teske, Maximilian N. Günther, Damien Ségransan, Jennifer A. Burt, Chelsea X. Huang, Andrew Vanderburg, Elisabeth Matthews, Xavier Dumusque, Keivan G. Stassun, Joshua Pepper, George R. Ricker, Roland Vanderspek, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins, Thomas Beatty, François Bouchy, Timothy M. BrownR. Paul Butler, David R. Ciardi, Jeffrey D. Crane, Jason D. Eastman, Luca Fossati, Jim Francis, Benjamin J. Fulton, B. Scott Gaudi, Robert F. Goeke, David James, Todd C. Klaus, Rudolf B. Kuhn, Christophe Lovis, Michael B. Lund, Scott McDermott, Martin Paegert, Francesco Pepe, Joseph E. Rodriguez, Lizhou Sha, Stephen A. Shectman, Avi Shporer, Robert J. Siverd, Aylin Garcia Soto, Daniel J. Stevens, Joseph D. Twicken, Stéphane Udry, Steven Villanueva, Sharon X. Wang, Bill Wohler, Xinyu Yao, Zhuchang Zhan

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

66 Scopus citations

Abstract

The future of exoplanet science is bright, as Transiting Exoplanet Survey Satellite (TESS) once again demonstrates with the discovery of its longest-period confirmed planet to date. We hereby present HD 21749b (TOI 186.01), a sub-Neptune in a 36 day orbit around a bright (V = 8.1) nearby (16 pc) K4.5 dwarf. TESS measures HD 21749b to be R _⊕, and combined archival and follow-up precision radial velocity data put the mass of the planet at M _⊕. HD 21749b contributes to the TESS Level 1 Science Requirement of providing 50 transiting planets smaller than 4 R _⊕ with measured masses. Furthermore, we report the discovery of HD 21749c (TOI 186.02), the first Earth-sized () planet from TESS. The HD 21749 system is a prime target for comparative studies of planetary composition and architecture in multi-planet systems.

Original language	English (US)
Article number	L7
Journal	Astrophysical Journal Letters
Volume	875
Issue number	2
DOIs	https://doi.org/10.3847/2041-8213/ab12ed
State	Published - Apr 20 2019
Externally published	Yes

Bibliographical note

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© 2019. The American Astronomical Society. All rights reserved..

Keywords

planetary systems
planets and satellites: detection
stars: individual (HD 21749, TIC 279741379)

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10.3847/2041-8213/ab12ed

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Dragomir, D., Teske, J., Günther, M. N., Ségransan, D., Burt, J. A., Huang, C. X., Vanderburg, A., Matthews, E., Dumusque, X., Stassun, K. G., Pepper, J., Ricker, G. R., Vanderspek, R., Latham, D. W., Seager, S., Winn, J. N., Jenkins, J. M., Beatty, T., Bouchy, F., ... Zhan, Z. (2019). TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune. Astrophysical Journal Letters, 875(2), Article L7. https://doi.org/10.3847/2041-8213/ab12ed

Dragomir, D, Teske, J, Günther, MN, Ségransan, D, Burt, JA, Huang, CX, Vanderburg, A, Matthews, E, Dumusque, X, Stassun, KG, Pepper, J, Ricker, GR, Vanderspek, R, Latham, DW, Seager, S, Winn, JN, Jenkins, JM, Beatty, T, Bouchy, F, Brown, TM, Butler, RP, Ciardi, DR, Crane, JD, Eastman, JD, Fossati, L, Francis, J, Fulton, BJ, Gaudi, BS, Goeke, RF, James, D, Klaus, TC, Kuhn, RB, Lovis, C, Lund, MB, McDermott, S, Paegert, M, Pepe, F, Rodriguez, JE, Sha, L, Shectman, SA, Shporer, A, Siverd, RJ, Soto, AG, Stevens, DJ, Twicken, JD, Udry, S, Villanueva, S, Wang, SX, Wohler, B, Yao, X & Zhan, Z 2019, 'TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune', Astrophysical Journal Letters, vol. 875, no. 2, L7. https://doi.org/10.3847/2041-8213/ab12ed

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abstract = "The future of exoplanet science is bright, as Transiting Exoplanet Survey Satellite (TESS) once again demonstrates with the discovery of its longest-period confirmed planet to date. We hereby present HD 21749b (TOI 186.01), a sub-Neptune in a 36 day orbit around a bright (V = 8.1) nearby (16 pc) K4.5 dwarf. TESS measures HD 21749b to be R ⊕, and combined archival and follow-up precision radial velocity data put the mass of the planet at M ⊕. HD 21749b contributes to the TESS Level 1 Science Requirement of providing 50 transiting planets smaller than 4 R ⊕ with measured masses. Furthermore, we report the discovery of HD 21749c (TOI 186.02), the first Earth-sized () planet from TESS. The HD 21749 system is a prime target for comparative studies of planetary composition and architecture in multi-planet systems.",

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AU - Dragomir, Diana

AU - Teske, Johanna

AU - Günther, Maximilian N.

AU - Ségransan, Damien

AU - Burt, Jennifer A.

AU - Huang, Chelsea X.

AU - Vanderburg, Andrew

AU - Matthews, Elisabeth

AU - Dumusque, Xavier

AU - Stassun, Keivan G.

AU - Pepper, Joshua

AU - Ricker, George R.

AU - Vanderspek, Roland

AU - Latham, David W.

AU - Seager, Sara

AU - Winn, Joshua N.

AU - Jenkins, Jon M.

AU - Beatty, Thomas

AU - Bouchy, François

AU - Brown, Timothy M.

AU - Butler, R. Paul

AU - Ciardi, David R.

AU - Crane, Jeffrey D.

AU - Eastman, Jason D.

AU - Fossati, Luca

AU - Francis, Jim

AU - Fulton, Benjamin J.

AU - Gaudi, B. Scott

AU - Goeke, Robert F.

AU - James, David

AU - Klaus, Todd C.

AU - Kuhn, Rudolf B.

AU - Lovis, Christophe

AU - Lund, Michael B.

AU - McDermott, Scott

AU - Paegert, Martin

AU - Pepe, Francesco

AU - Rodriguez, Joseph E.

AU - Sha, Lizhou

AU - Shectman, Stephen A.

AU - Shporer, Avi

AU - Siverd, Robert J.

AU - Soto, Aylin Garcia

AU - Stevens, Daniel J.

AU - Twicken, Joseph D.

AU - Udry, Stéphane

AU - Villanueva, Steven

AU - Wang, Sharon X.

AU - Wohler, Bill

AU - Yao, Xinyu

AU - Zhan, Zhuchang

PY - 2019/4/20

Y1 - 2019/4/20

N2 - The future of exoplanet science is bright, as Transiting Exoplanet Survey Satellite (TESS) once again demonstrates with the discovery of its longest-period confirmed planet to date. We hereby present HD 21749b (TOI 186.01), a sub-Neptune in a 36 day orbit around a bright (V = 8.1) nearby (16 pc) K4.5 dwarf. TESS measures HD 21749b to be R ⊕, and combined archival and follow-up precision radial velocity data put the mass of the planet at M ⊕. HD 21749b contributes to the TESS Level 1 Science Requirement of providing 50 transiting planets smaller than 4 R ⊕ with measured masses. Furthermore, we report the discovery of HD 21749c (TOI 186.02), the first Earth-sized () planet from TESS. The HD 21749 system is a prime target for comparative studies of planetary composition and architecture in multi-planet systems.

AB - The future of exoplanet science is bright, as Transiting Exoplanet Survey Satellite (TESS) once again demonstrates with the discovery of its longest-period confirmed planet to date. We hereby present HD 21749b (TOI 186.01), a sub-Neptune in a 36 day orbit around a bright (V = 8.1) nearby (16 pc) K4.5 dwarf. TESS measures HD 21749b to be R ⊕, and combined archival and follow-up precision radial velocity data put the mass of the planet at M ⊕. HD 21749b contributes to the TESS Level 1 Science Requirement of providing 50 transiting planets smaller than 4 R ⊕ with measured masses. Furthermore, we report the discovery of HD 21749c (TOI 186.02), the first Earth-sized () planet from TESS. The HD 21749 system is a prime target for comparative studies of planetary composition and architecture in multi-planet systems.

KW - planetary systems

KW - planets and satellites: detection

KW - stars: individual (HD 21749, TIC 279741379)

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JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

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ER -

TESS Delivers Its First Earth-sized Planet and a Warm Sub-Neptune

Abstract

Bibliographical note

Keywords

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