TY - JOUR
T1 - A Second Earth-sized Planet in the Habitable Zone of the M Dwarf, TOI-700
AU - Gilbert, Emily A.
AU - Vanderburg, Andrew
AU - Rodriguez, Joseph E.
AU - Hord, Benjamin J.
AU - Clement, Matthew S.
AU - Barclay, Thomas
AU - Quintana, Elisa V.
AU - Schlieder, Joshua E.
AU - Kane, Stephen R.
AU - Jenkins, Jon M.
AU - Twicken, Joseph D.
AU - Kunimoto, Michelle
AU - Vanderspek, Roland
AU - Arney, Giada N.
AU - Charbonneau, David
AU - Günther, Maximilian N.
AU - Huang, Chelsea X.
AU - Isopi, Giovanni
AU - Kostov, Veselin B.
AU - Kristiansen, Martti H.
AU - Latham, David W.
AU - Mallia, Franco
AU - Mamajek, Eric E.
AU - Mireles, Ismael
AU - Quinn, Samuel N.
AU - Ricker, George R.
AU - Schulte, Jack
AU - Seager, S.
AU - Suissa, Gabrielle
AU - Winn, Joshua N.
AU - Youngblood, Allison
AU - Zapparata, Aldo
N1 - Funding Information:
B.J.H. acknowledges support from the Future Investigators in NASA Earth and Space Science and Technology (FINESST) program grant 80NSSC20K1551.
Funding Information:
M.N.G. acknowledges support from the European Space Agency (ESA) as an ESA Research Fellow.
Funding Information:
Funding for the TESS mission is provided by NASA’s Science Mission directorate. We acknowledge the use of public TESS Alert data from pipelines at the TESS Science Office and at the TESS Science Processing Operations Center.
Funding Information:
E.A.G. thanks the LSSTC Data Science Fellowship Program, which is funded by LSSTC, NSF Cybertraining Grant #1829740, the Brinson Foundation, and the Moore Foundation; her participation in the program has benefited this work. E.A.G. is thankful for support from GSFC Sellers Exoplanet Environments Collaboration (SEEC), which is funded by the NASA Planetary Science Division's Internal Scientist Funding Model. The material is based upon work supported by NASA under award number 80GSFC21M0002. This work was also supported by NASA awards 80NSSC19K0104 and 80NSSC19K0315.
Funding Information:
C.H. thanks the support of the ARC DECRA program DE210101893.
Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/2/1
Y1 - 2023/2/1
N2 - We report the discovery of TOI-700 e, a 0.95 R ⊕ planet residing in the Optimistic Habitable Zone (HZ) of its host star. This discovery was enabled by multiple years of monitoring from NASA’s Transiting Exoplanet Survey Satellite (TESS) mission. The host star, TOI-700 (TIC 150428135), is a nearby (31.1 pc), inactive, M2.5 dwarf (V mag = 13.15). TOI-700 is already known to host three planets, including the small, HZ planet, TOI-700 d. The new planet has an orbital period of 27.8 days, and based on its radius (0.95 R ⊕), it is likely rocky. TOI-700 was observed for 21 sectors over Years 1 and 3 of the TESS mission, including 10 sectors at 20 s cadence in Year 3. Using this full set of TESS data and additional follow-up observations, we identify, validate, and characterize TOI-700 e. This discovery adds another world to the short list of small, HZ planets transiting nearby and bright host stars. Such systems, where the stars are bright enough that follow-up observations are possible to constrain planet masses and atmospheres using current and future facilities, are incredibly valuable. The presence of multiple small, HZ planets makes this system even more enticing for follow-up observations.
AB - We report the discovery of TOI-700 e, a 0.95 R ⊕ planet residing in the Optimistic Habitable Zone (HZ) of its host star. This discovery was enabled by multiple years of monitoring from NASA’s Transiting Exoplanet Survey Satellite (TESS) mission. The host star, TOI-700 (TIC 150428135), is a nearby (31.1 pc), inactive, M2.5 dwarf (V mag = 13.15). TOI-700 is already known to host three planets, including the small, HZ planet, TOI-700 d. The new planet has an orbital period of 27.8 days, and based on its radius (0.95 R ⊕), it is likely rocky. TOI-700 was observed for 21 sectors over Years 1 and 3 of the TESS mission, including 10 sectors at 20 s cadence in Year 3. Using this full set of TESS data and additional follow-up observations, we identify, validate, and characterize TOI-700 e. This discovery adds another world to the short list of small, HZ planets transiting nearby and bright host stars. Such systems, where the stars are bright enough that follow-up observations are possible to constrain planet masses and atmospheres using current and future facilities, are incredibly valuable. The presence of multiple small, HZ planets makes this system even more enticing for follow-up observations.
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U2 - 10.3847/2041-8213/acb599
DO - 10.3847/2041-8213/acb599
M3 - Article
AN - SCOPUS:85148742574
SN - 2041-8205
VL - 944
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 2
M1 - L35
ER -