GJ 1252 b: A 1.2 R ⊕ Planet Transiting an M3 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 Leépine; 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 M3 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 KielkopfEnric 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 Leépine, Philip S. Muirhead, Mark E. Rose, Joseph D. Twicken, Jesus Noel Villasenor

Astrophysical Sciences

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33 Scopus citations

Abstract

We report the discovery of GJ 1252 b, a planet with a radius of 1.193 ± 0.074 R and an orbital period of 0.52 days around an M3-type star (0.381 ± 0.019 M, 0.391 ± 0.020 R) 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 (US)
Article number	L7
Journal	Astrophysical Journal Letters
Volume	890
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/ab7020
State	Published - Feb 10 2020

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/2041-8213/ab7020

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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 M3 Dwarf at 20.4 pc. Astrophysical Journal Letters, 890(1), Article L7. https://doi.org/10.3847/2041-8213/ab7020

@article{a85af1f6f9cd4dfeaac35d85b1eb8c3c,

title = "GJ 1252 b: A 1.2 R ⊕ Planet Transiting an M3 Dwarf at 20.4 pc",

abstract = "We report the discovery of GJ 1252 b, a planet with a radius of 1.193 ± 0.074 R and an orbital period of 0.52 days around an M3-type star (0.381 ± 0.019 M, 0.391 ± 0.020 R) 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.",

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 Tan, {Thiam Guan} 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 Le{\'e}pine and Muirhead, {Philip S.} and Rose, {Mark E.} and Twicken, {Joseph D.} and Villasenor, {Jesus Noel}",

year = "2020",

month = feb,

day = "10",

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

language = "English (US)",

volume = "890",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

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, TG, Vanderburg, A, Ricker, GR, Latham, DW, Vanderspek, R, Seager, S, Winn, JN, Jenkins, JM, Colon, K, Dressing, CD, Leépine, S, Muirhead, PS, Rose, ME, Twicken, JD & Villasenor, JN 2020, 'GJ 1252 b: A 1.2 R _⊕ Planet Transiting an M3 Dwarf at 20.4 pc', Astrophysical Journal Letters, vol. 890, no. 1, L7. https://doi.org/10.3847/2041-8213/ab7020

TY - JOUR

T1 - GJ 1252 b

T2 - A 1.2 R ⊕ Planet Transiting an M3 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 - Leépine, Sébastien

AU - Muirhead, Philip S.

AU - Rose, Mark E.

AU - Twicken, Joseph D.

AU - Villasenor, Jesus Noel

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 R and an orbital period of 0.52 days around an M3-type star (0.381 ± 0.019 M, 0.391 ± 0.020 R) 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 R and an orbital period of 0.52 days around an M3-type star (0.381 ± 0.019 M, 0.391 ± 0.020 R) 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.

UR - http://www.scopus.com/inward/record.url?scp=85081399626&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85081399626&partnerID=8YFLogxK

U2 - 10.3847/2041-8213/ab7020

DO - 10.3847/2041-8213/ab7020

M3 - Article

AN - SCOPUS:85081399626

SN - 2041-8205

VL - 890

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L7

ER -

GJ 1252 b: A 1.2 R _⊕ Planet Transiting an M3 Dwarf at 20.4 pc

Abstract

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