TOI-1842b: A Transiting Warm Saturn Undergoing Reinflation around an Evolving Subgiant
Name
Wittenmyer_2022_AJ_163_82.pdf
Description
Published version
Size
2.13 MB
Format
Adobe PDF
Checksum (MD5)
d46c9dd20425019c1c237874598514df
Author(s)
Seager, Sara
Date Issued
2022
Journal
Astronomical Journal
Publisher
American Astronomical Society
Citation
Seager, Sara. 2022. "TOI-1842b: A Transiting Warm Saturn Undergoing Reinflation around an Evolving Subgiant." Astronomical Journal, 163 (2).
Version
Final published version
Abstract
The imminent launch of space telescopes designed to probe the atmospheres of exoplanets has prompted new efforts to prioritize the thousands of transiting planet candidates for follow-up characterization. We report the detection and confirmation of TOI-1842b, a warm Saturn identified by TESS and confirmed with ground-based observations from Minerva-Australis, NRES, and the Las Cumbres Observatory Global Telescope. This planet has a radius of ${1.04}_{-0.05}^{+0.06}$ RJ, a mass of ${0.214}_{-0.038}^{+0.040}$ MJ, an orbital period of ${9.5739}_{-0.0001}^{+0.0002}$ days, and an extremely low density (ρ = 0.252 ± 0.091 g cm−3). TOI-1842b has among the best known combinations of large atmospheric scale height (893 km) and host-star brightness (J = 8.747 mag), making it an attractive target for atmospheric characterization. As the host star is beginning to evolve off the main sequence, TOI-1842b presents an excellent opportunity to test models of gas giant reinflation. The primary transit duration of only 4.3 hr also makes TOI-1842b an easily-schedulable target for further ground-based atmospheric characterization.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.3847/1538-3881/AC3F39
