The first habitable-zone Earth-sized planet from TESS. II. Spitzer confirms TOI-700 d
Files
Accepted manuscript
Date
2020-08-14
Authors
Rodriguez, Joseph E.
Vanderburg, Andrew
Zieba, Sebastian
Kreidberg, Laura
Morley, Caroline V.
Eastman, Jason D.
Kane, Stephen R.
Spencer, Alton
Quinn, Samuel N.
Cloutier, Ryan
Version
Accepted manuscript
OA Version
Citation
Joseph E Rodriguez, Andrew Vanderburg, Sebastian Zieba, Laura Kreidberg, Caroline V Morley, Jason D Eastman, Stephen R Kane, Alton Spencer, Samuel N Quinn, Ryan Cloutier, Chelsea X Huang, Karen A Collins, Andrew W Mann, Emily Gilbert, Joshua E Schlieder, Elisa V Quintana, Thomas Barclay, Gabrielle Suissa, Ravi kumar Kopparapu, Courtney D Dressing, George R Ricker, Roland K Vanderspek, David W Latham, Sara Seager, Joshua N Winn, Jon M Jenkins, Zachory Berta-Thompson, Patricia T Boyd, David Charbonneau, Douglas A Caldwell, Eugene Chiang, Jessie L Christiansen, David R Ciardi, Knicole D Colón, John Doty, Tianjun Gan, Natalia Guerrero, Maximilian N Günther, Eve J Lee, Alan M Levine, Eric Lopez, Philip S Muirhead, Elisabeth Newton, Mark E Rose, Joseph D Twicken, Jesus Noel Villaseñor. "The First Habitable-zone Earth-sized Planet from TESS. II. Spitzer Confirms TOI-700 d." The Astronomical Journal, Volume 160, Issue 3, pp. 117 - 117. https://doi.org/10.3847/1538-3881/aba4b3
Abstract
We present Spitzer 4.5 μm observations of the transit of TOI-700 d, a habitable-zone Earth-sized planet in a multiplanet system transiting a nearby M-dwarf star (TIC 150428135, 2MASS J06282325–6534456). TOI-700 d has a radius of 1.144_-0.061^+0.062R_⨁ and orbits within its host star's conservative habitable zone with a period of 37.42 days (T eq ~ 269 K). TOI-700 also hosts two small inner planets (R b = 1.037_-0.064^+0.065R_⨁ and R c = 2.65_-0.15^+0.16R_⨁) with periods of 9.98 and 16.05 days, respectively. Our Spitzer observations confirm the Transiting Exoplanet Survey Satellite (TESS) detection of TOI-700 d and remove any remaining doubt that it is a genuine planet. We analyze the Spitzer light curve combined with the 11 sectors of TESS observations and a transit of TOI-700 c from the LCOGT network to determine the full system parameters. Although studying the atmosphere of TOI-700 d is not likely feasible with upcoming facilities, it may be possible to measure the mass of TOI-700 d using state-of-the-art radial velocity (RV) instruments (expected RV semiamplitude of ~70 cm s^−1).
Description
License
© 2020. The American Astronomical Society. All rights reserved.