GJ 1252 b: a 1.2 R⊕ planet transiting an M-dwarf at 20.4 pc

Avi Shporer; Karen A. Collins; Nicola Astudillo-Defru; Jonathan Irwin; Xavier Bonfils; Kevin I. Collins; Elisabeth Matthews; Jennifer G. Winters; David R. Anderson; James D. Armstrong; David Charbonneau; Ryan Cloutier; Tansu Daylan; Tianjun Gan; Maximilian N. Günther; Coel Hellier; Keith Horne; Chelsea X. Huang; Eric L. N. Jensen; John Kielkopf; Enric Palle; Ramotholo Sefako; Keivan G. Stassun; Thiam-Guan Tan; Andrew Vanderburg; George R. Ricker; David W. Latham; Roland Vanderspek; Sara Seager; Joshua N. Winn; Jon M. Jenkins; Knicole Colon; Courtney D. Dressing; Sébastien Lépine; Philip S. Muirhead; Mark E. Rose; Joseph D. Twicken; Jesus Noel Villasenor

doi:10.3847/2041-8213/ab7020

GJ 1252 b: a 1.2 R_⊕ planet transiting an M-dwarf at 20.4 pc

Avi Shporer
, Karen A. Collins
, Nicola Astudillo-Defru
, Jonathan Irwin
, Xavier Bonfils
, Kevin I. Collins
, Elisabeth Matthews
, Jennifer G. Winters
, David R. Anderson
, James D. Armstrong
, David Charbonneau
, Ryan Cloutier
, Tansu Daylan
, Tianjun Gan
, Maximilian N. Günther
, Coel Hellier
, Keith Horne
, Chelsea X. Huang
, Eric L. N. Jensen
, John Kielkopf

Enric Palle, Ramotholo Sefako, Keivan G. Stassun, Thiam-Guan Tan, Andrew Vanderburg, George R. Ricker, David W. Latham, Roland Vanderspek, Sara Seager, Joshua N. Winn, Jon M. Jenkins, Knicole Colon, Courtney D. Dressing, Sébastien Lépine, Philip S. Muirhead, Mark E. Rose, Joseph D. Twicken, Jesus Noel Villasenor

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

Abstract

We report the discovery of GJ 1252 b, a planet with a radius of 1.193 ± 0.074 and an orbital period of 0.52 days around an M3-type star (0.381 ± 0.019 , 0.391 ± 0.020 ) located 20.385 ± 0.019 pc away. We use Transiting Exoplanet Survey Satellite (TESS) data, ground-based photometry and spectroscopy, Gaia astrometry, and high angular resolution imaging to show that the transit signal seen in the TESS data must originate from a transiting planet. We do so by ruling out all false-positive scenarios that attempt to explain the transit signal as originating from an eclipsing stellar binary. Precise Doppler monitoring also leads to a tentative mass measurement of 2.09 ± 0.56 M _⊕. The host star proximity, brightness (V = 12.19 mag, K = 7.92 mag), low stellar activity, and the system's short orbital period make this planet an attractive target for detailed characterization, including precise mass measurement, looking for other objects in the system, and planet atmosphere characterization.

Original language	English
Journal	Astrophysical Journal
Volume	890
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/ab7020
Publication status	Published - 10 Feb 2020

Keywords

Exoplanet astronomy
M dwarf stars
Exoplanets

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10.3847/2041-8213/ab7020

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Copyright © 2020 American Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.3847/2041-8213/ab7020
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Astronomy at St Andrews 2018-2021: Astronomy at St Andrews 2018-2021
Jardine, M. (PI), Bonnell, I. (CoI), Cameron, A. (CoI), Cyganowski, C. (CoI), Dominik, M. (CoI), Helling, C. (CoI), Horne, K. (CoI), Scholz, A. (CoI), Tojeiro, R. (CoI), Weijmans, A.-M. (CoI), Wild, V. (CoI), Woitke, P. (CoI), Wood, K. (CoI) & Zhao, H. (CoI)
1/04/18 → 31/03/22
Project: Standard

Cite this

Shporer, A., Collins, K. A., Astudillo-Defru, N., Irwin, J., Bonfils, X., Collins, K. I., Matthews, E., Winters, J. G., Anderson, D. R., Armstrong, J. D., Charbonneau, D., Cloutier, R., Daylan, T., Gan, T., Günther, M. N., Hellier, C., Horne, K., Huang, C. X., Jensen, E. L. N., ... Villasenor, J. N. (2020). GJ 1252 b: a 1.2 R_⊕ planet transiting an M-dwarf at 20.4 pc. Astrophysical Journal, 890(1). https://doi.org/10.3847/2041-8213/ab7020

@article{31ea55a424764e29a7bca81099e712c1,

title = "GJ 1252 b: a 1.2 R⊕ planet transiting an M-dwarf at 20.4 pc",

abstract = "We report the discovery of GJ 1252 b, a planet with a radius of 1.193 ± 0.074 and an orbital period of 0.52 days around an M3-type star (0.381 ± 0.019 , 0.391 ± 0.020 ) located 20.385 ± 0.019 pc away. We use Transiting Exoplanet Survey Satellite (TESS) data, ground-based photometry and spectroscopy, Gaia astrometry, and high angular resolution imaging to show that the transit signal seen in the TESS data must originate from a transiting planet. We do so by ruling out all false-positive scenarios that attempt to explain the transit signal as originating from an eclipsing stellar binary. Precise Doppler monitoring also leads to a tentative mass measurement of 2.09 ± 0.56 M ⊕. The host star proximity, brightness (V = 12.19 mag, K = 7.92 mag), low stellar activity, and the system's short orbital period make this planet an attractive target for detailed characterization, including precise mass measurement, looking for other objects in the system, and planet atmosphere characterization.",

keywords = "Exoplanet astronomy, M dwarf stars, Exoplanets",

author = "Avi Shporer and Collins, \{Karen A.\} and Nicola Astudillo-Defru and Jonathan Irwin and Xavier Bonfils and Collins, \{Kevin I.\} and Elisabeth Matthews and Winters, \{Jennifer G.\} and Anderson, \{David R.\} and Armstrong, \{James D.\} and David Charbonneau and Ryan Cloutier and Tansu Daylan and Tianjun Gan and G{\"u}nther, \{Maximilian N.\} and Coel Hellier and Keith Horne and Huang, \{Chelsea X.\} and Jensen, \{Eric L. N.\} and John Kielkopf and Enric Palle and Ramotholo Sefako and Stassun, \{Keivan G.\} and Thiam-Guan Tan and Andrew Vanderburg and Ricker, \{George R.\} and Latham, \{David W.\} and Roland Vanderspek and Sara Seager and Winn, \{Joshua N.\} and Jenkins, \{Jon M.\} and Knicole Colon and Dressing, \{Courtney D.\} and S{\'e}bastien L{\'e}pine and Muirhead, \{Philip S.\} and Rose, \{Mark E.\} and Twicken, \{Joseph D.\} and Villasenor, \{Jesus Noel\}",

note = "Funding: UK STFC grant ST/R000824/1 (K.H.).",

year = "2020",

month = feb,

day = "10",

doi = "10.3847/2041-8213/ab7020",

language = "English",

volume = "890",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

Shporer, A, Collins, KA, Astudillo-Defru, N, Irwin, J, Bonfils, X, Collins, KI, Matthews, E, Winters, JG, Anderson, DR, Armstrong, JD, Charbonneau, D, Cloutier, R, Daylan, T, Gan, T, Günther, MN, Hellier, C, Horne, K, Huang, CX, Jensen, ELN, Kielkopf, J, Palle, E, Sefako, R, Stassun, KG, Tan, T-G, Vanderburg, A, Ricker, GR, Latham, DW, Vanderspek, R, Seager, S, Winn, JN, Jenkins, JM, Colon, K, Dressing, CD, Lépine, S, Muirhead, PS, Rose, ME, Twicken, JD & Villasenor, JN 2020, 'GJ 1252 b: a 1.2 R_⊕ planet transiting an M-dwarf at 20.4 pc', Astrophysical Journal, vol. 890, no. 1. https://doi.org/10.3847/2041-8213/ab7020

TY - JOUR

T1 - GJ 1252 b

T2 - a 1.2 R⊕ planet transiting an M-dwarf at 20.4 pc

AU - Shporer, Avi

AU - Collins, Karen A.

AU - Astudillo-Defru, Nicola

AU - Irwin, Jonathan

AU - Bonfils, Xavier

AU - Collins, Kevin I.

AU - Matthews, Elisabeth

AU - Winters, Jennifer G.

AU - Anderson, David R.

AU - Armstrong, James D.

AU - Charbonneau, David

AU - Cloutier, Ryan

AU - Daylan, Tansu

AU - Gan, Tianjun

AU - Günther, Maximilian N.

AU - Hellier, Coel

AU - Horne, Keith

AU - Huang, Chelsea X.

AU - Jensen, Eric L. N.

AU - Kielkopf, John

AU - Palle, Enric

AU - Sefako, Ramotholo

AU - Stassun, Keivan G.

AU - Tan, Thiam-Guan

AU - Vanderburg, Andrew

AU - Ricker, George R.

AU - Latham, David W.

AU - Vanderspek, Roland

AU - Seager, Sara

AU - Winn, Joshua N.

AU - Jenkins, Jon M.

AU - Colon, Knicole

AU - Dressing, Courtney D.

AU - Lépine, Sébastien

AU - Muirhead, Philip S.

AU - Rose, Mark E.

AU - Twicken, Joseph D.

AU - Villasenor, Jesus Noel

N1 - Funding: UK STFC grant ST/R000824/1 (K.H.).

PY - 2020/2/10

Y1 - 2020/2/10

N2 - We report the discovery of GJ 1252 b, a planet with a radius of 1.193 ± 0.074 and an orbital period of 0.52 days around an M3-type star (0.381 ± 0.019 , 0.391 ± 0.020 ) located 20.385 ± 0.019 pc away. We use Transiting Exoplanet Survey Satellite (TESS) data, ground-based photometry and spectroscopy, Gaia astrometry, and high angular resolution imaging to show that the transit signal seen in the TESS data must originate from a transiting planet. We do so by ruling out all false-positive scenarios that attempt to explain the transit signal as originating from an eclipsing stellar binary. Precise Doppler monitoring also leads to a tentative mass measurement of 2.09 ± 0.56 M ⊕. The host star proximity, brightness (V = 12.19 mag, K = 7.92 mag), low stellar activity, and the system's short orbital period make this planet an attractive target for detailed characterization, including precise mass measurement, looking for other objects in the system, and planet atmosphere characterization.

AB - We report the discovery of GJ 1252 b, a planet with a radius of 1.193 ± 0.074 and an orbital period of 0.52 days around an M3-type star (0.381 ± 0.019 , 0.391 ± 0.020 ) located 20.385 ± 0.019 pc away. We use Transiting Exoplanet Survey Satellite (TESS) data, ground-based photometry and spectroscopy, Gaia astrometry, and high angular resolution imaging to show that the transit signal seen in the TESS data must originate from a transiting planet. We do so by ruling out all false-positive scenarios that attempt to explain the transit signal as originating from an eclipsing stellar binary. Precise Doppler monitoring also leads to a tentative mass measurement of 2.09 ± 0.56 M ⊕. The host star proximity, brightness (V = 12.19 mag, K = 7.92 mag), low stellar activity, and the system's short orbital period make this planet an attractive target for detailed characterization, including precise mass measurement, looking for other objects in the system, and planet atmosphere characterization.

KW - Exoplanet astronomy

KW - M dwarf stars

KW - Exoplanets

U2 - 10.3847/2041-8213/ab7020

DO - 10.3847/2041-8213/ab7020

M3 - Article

SN - 0004-637X

VL - 890

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -