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
N1 - Publisher Copyright:
© 2020. The American Astronomical Society. All rights reserved.
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 -